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  • 1. Generaloy, Alexander V.
    et al.
    Simonov, Konstantin A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Vinogradov, Nikolay A.
    Zagrebina, Elena M.
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Preobrajenski, Alexei B.
    Vinogradoy, Alexander S.
    Evolution of CuI/Graphene/Ni(111) System during Vacuum Annealing2015In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 119, no 22, p. 12434-12444Article in journal (Refereed)
    Abstract [en]

    We present a combined core-level spectroscopy and low-energy electron diffraction study of the evolution of thin CuI layers on graphene/Ni(111) during annealing. It has been found that the annealing of the CuI/graphene/Ni(111) system up to 160 degrees C results in the formation of an ordered CuI overlayer with a (root 3 x root 3) R30 degrees structure on top of the graphene surface. At annealing temperatures of about 180 degrees C or higher, the CuI overlayer decomposes with a simultaneous intercalation of Cu and I atoms underneath the graphene monolayer on Ni(111). Nearly complete intercalation of graphene by Cu and I atoms can be achieved by deposition of about 20 angstrom of CuI, followed by annealing at 200 degrees C. The intercalated graphene layer is p-doped due to interfacial iodine atoms.

  • 2.
    Jacobse, Peter H.
    et al.
    Univ Utrecht, Debye Inst Nanomat Sci, POB 80000, NL-3508 TA Utrecht, Netherlands.
    Simonov, Konstantin A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Mangnus, Mark J. J.
    Univ Utrecht, Debye Inst Nanomat Sci, POB 80000, NL-3508 TA Utrecht, Netherlands.
    Svirskiy, Gleb I.
    St Petersburg State Univ, VA Fock Inst Phys, St Petersburg 198504, Russia.
    Generalov, Alexander V.
    Lund Univ, MAX Lab 4, Box 118, S-22100 Lund, Sweden.
    Vinogradov, Alexander S.
    St Petersburg State Univ, VA Fock Inst Phys, St Petersburg 198504, Russia.
    Sandell, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Preobrajenski, Alexei B.
    Lund Univ, MAX Lab 4, Box 118, S-22100 Lund, Sweden.
    Swart, Ingmar
    Univ Utrecht, Debye Inst Nanomat Sci, POB 80000, NL-3508 TA Utrecht, Netherlands.
    One Precursor but Two Types of Graphene Nanoribbons: On-Surface Transformations of 10,10'-Dichloro-9,9'-bianthryl on Ag(111)2019In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 123, no 14, p. 8892-8901Article in journal (Refereed)
    Abstract [en]

    On-surface synthesis has emerged in the last decade as a method to create graphene nanoribbons (GNRs) with atomic precision. The underlying premise of this bottom-up strategy is that precursor molecules undergo a well-defined sequence of inter- and intramolecular reactions, leading to the formation of a single product. As such, the structure of the GNR is encoded in the precursors. However, recent examples have shown that not only the molecule, but also the coinage metal surface on which the reaction takes place, plays a decisive role in dictating the nanoribbon structure. In this work, we use scanning probe microscopy and X-ray photoelectron spectroscopy to investigate the behavior of 10,10'-dichloro-9,9'-bianthryl (DCBA) on Ag(111). Our study shows that Ag(111) can induce the formation of both seven-atom wide armchair GNRs (7-acGNRs) and 3,1-chiral GNRs (3,1-cGNRs), demonstrating that a single molecule on a single surface can react to different nanoribbon products. We additionally show that coadsorbed dibromoperylene can promote surface-assisted dehydrogenative coupling in DCBA, leading to the exclusive formation of 3,1-cGNRs.

  • 3.
    Lanzilotto, Valeria
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Silva, Jose Luis
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Zhang, Teng
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Stredansky, Matus
    Univ Trieste, Dept Phys, Via A Valerio 2, I-34127 Trieste, Italy;CNR, IOM, Lab TASC, Basovizza SS-14,Km 163-5, I-34149 Trieste, Italy.
    Grazioli, Cesare
    CNR, ISM, Unit LD2, Basovizza SS-14,Km 163-5, I-34149 Trieste, Italy.
    Simonov, Konstantin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Giangrisostomi, Erika
    Helmholtz Zentrum Berlin GmbH, Inst Methods & Instrumentat Synchrotron Radiat Re, Albert Einstein Str 15, D-12489 Berlin, Germany.
    Ovsyannikov, Ruslan
    Helmholtz Zentrum Berlin GmbH, Inst Methods & Instrumentat Synchrotron Radiat Re, Albert Einstein Str 15, D-12489 Berlin, Germany.
    De Simone, Monica
    CNR, IOM, Lab TASC, Basovizza SS-14,Km 163-5, I-34149 Trieste, Italy.
    Coreno, Marcello
    CNR, ISM, Unit LD2, Basovizza SS-14,Km 163-5, I-34149 Trieste, Italy.
    Araujo, Carlos Moyses
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Brena, Barbara
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Puglia, Carla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Spectroscopic Fingerprints of Intermolecular H-Bonding Interactions in Carbon Nitride Model Compounds2018In: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 24, no 53, p. 14198-14206Article in journal (Refereed)
    Abstract [en]

    The effect of intermolecular H-bonding interactions on the local electronic structure of N-containing functional groups (amino group and pyridine-like N) that are characteristic of polymeric carbon nitride materials p-CN(H), a new class of metal-free organophotocatalysts, was investigated. Specifically, the melamine molecule, a building block of p-CN(H), was characterized by X-ray photoelectron (XPS) and near edge X-ray absorption fine structure (NEXAFS) spectroscopy. The molecule was studied as a noninteracting system in the gas phase and in the solid state within a H-bonded network. With the support of DFT simulations of the spectra, it was found that the H-bonds mainly affect the N1s level of the amino group, leaving the N1s level of the pyridine-like N mostly unperturbed. This is responsible for a reduction of the chemical shift between the two XPS N1s levels relative to free melamine. Consequently, N K-edge NEXAFS resonances involving the amino N1s level also shift to lower photon energies. Moreover, the solid-state absorption spectra showed significant modification/quenching of resonances related to transitions from the amino N1s level to sigma* orbitals involving the NH2 termini.

  • 4.
    Lanzilotto, Valeria
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Silva, Jose Luis
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Zhang, Teng
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Stredansky, Matuš
    Department of Physics University of Trieste.
    Grazioli, Cesare
    CNR-ISM, Istituto di Struttura della Materia (LD2 Unit).
    Simonov, Konstantin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Giangrisostomi, Erika
    Institute Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin GmbH.
    Ovsyannikov, Ruslan
    Institute Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin GmbH.
    de Simone, Monica
    CNR-IOM, Istituto Officina dei Materiali (Laboratorio TASC).
    Coreno, Marcello
    CNR-ISM, Istituto di Struttura della Materia (LD2 Unit).
    Araujo, Carlos Moyses
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Brena, Barbara
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
    Puglia, Carla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Spectroscopic Fingerprints of Carbon Nitride Functional Groups Locked-up in Intermolecular H-bonding InteractionsIn: Chemistry: A European Journal, ISSN 0947-6539Article in journal (Refereed)
    Abstract [en]

    We have investigated the effect of intermolecular H- bonding interactions on the local electronic structure of N- functionalities, amino group and pyridine-like N, which are characteristic of a new class of metal-free polymeric photo-catalysts named graphitic carbon nitrides, g-C3N4. Specifically, we have performed a characterization of the melamine molecule, a building block of g-C3N4, combining X-ray photoemission (XPS) and near edge X-ray absorption fine structure (NEXAFS) spectroscopy. The molecule has been studied in the gas phase, as non-interacting system, and in the solid state within a hydrogen bonded network. With the support of density functional theory (DFT) simulations of the spectra, we have found that the H-bonds mainly affect the N 1s level of the amino group, leaving the N 1s level of the pyridine-like N mostly unperturbed. This fact is responsible for a reduction of the chemical shift between the two XPS N 1s levels, compared to the free melamine. Consequently, N K-edge NEXAFS resonances involving the amino N 1s level also shift to lower photon energies. Moreover, the solid state absorption spectra have shown strong modification/quenching of resonances related with transitions from the amino N 1s level towards σ*orbitals involving the -NH2 terminations. 

  • 5.
    Marks, Kess
    et al.
    Stockholm Univ, Fysikum, Dept Phys, S-10691 Stockholm, Sweden.
    Yazdi, Milad Ghadami
    KTH Royal Inst Technol, Mat & Nanophys, SCI, S-16440 Kista, Sweden.
    Piskorz, Witold
    Jagiellonian Univ Krakow, Fac Chem, Gronostajowa 2, PL-31387 Krakow, Poland.
    Simonov, Konstantin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Stefanuik, Robert
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Sostina, Daria
    Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
    Guarnaccio, Ambra
    CNR, ISM, Tito Scalo Unit, I-85050 Potenza, Italy.
    Ovsyannikov, Ruslan
    Helmholtz Zentrum Berlin Mat & Energie, Inst Methods & Instrumentat Synchrotron Radiat Re, ISRR, D-12489 Berlin, Germany.
    Giangrisostomi, Erika
    Helmholtz Zentrum Berlin Mat & Energie, Inst Methods & Instrumentat Synchrotron Radiat Re, ISRR, D-12489 Berlin, Germany.
    Sassa, Yasmine
    Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden.
    Bachellier, Nicolas
    Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
    Muntwiler, Matthias
    Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
    Johansson, Fredrik O. L.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Lindblad, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Hansson, Tony
    Stockholm Univ, Fysikum, Dept Phys, S-10691 Stockholm, Sweden.
    Kotarba, Andrzej
    Jagiellonian Univ Krakow, Fac Chem, Gronostajowa 2, PL-31387 Krakow, Poland.
    Engvall, Klas
    KTH Royal Inst Technol, Dept Chem Engn, S-10044 Stockholm, Sweden.
    Gothelid, Mats
    KTH Royal Inst Technol, Mat & Nanophys, SCI, S-16440 Kista, Sweden.
    Harding, Dan J.
    KTH Royal Inst Technol, Dept Chem Engn, S-10044 Stockholm, Sweden.
    Ostrom, Henrik
    Stockholm Univ, Fysikum, Dept Phys, S-10691 Stockholm, Sweden.
    Investigation of the surface species during temperature dependent dehydrogenation of naphthalene on Ni(111)2019In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 150, no 24, article id 244704Article in journal (Refereed)
    Abstract [en]

    The temperature dependent dehydrogenation of naphthalene on Ni(111) has been investigated using vibrational sum-frequency generation spectroscopy, X-ray photoelectron spectroscopy, scanning tunneling microscopy, and density functional theory with the aim of discerning the reaction mechanism and the intermediates on the surface. At 110 K, multiple layers of naphthalene adsorb on Ni(111); the first layer is a flat lying chemisorbed monolayer, whereas the next layer(s) consist of physisorbed naphthalene. The aromaticity of the carbon rings in the first layer is reduced due to bonding to the surface Ni-atoms. Heating at 200 K causes desorption of the multilayers. At 360 K, the chemisorbed naphthalene monolayer starts dehydrogenating and the geometry of the molecules changes as the dehydrogenated carbon atoms coordinate to the nickel surface; thus, the molecule tilts with respect to the surface, recovering some of its original aromaticity. This effect peaks at 400 K and coincides with hydrogen desorption. Increasing the temperature leads to further dehydrogenation and production of H-2 gas, as well as the formation of carbidic and graphitic surface carbon. Published under license by AIP Publishing.

    The full text will be freely available from 2020-06-27 00:00
  • 6.
    Senkovskiy, B. V.
    et al.
    Physikalisches Institut, Universitat zu Koln, Zulpicher Strasse 77, 50937 Koln.
    Fedorov, A.
    Physikalisches Institut, Universitat zu Koln, Zulpicher Strasse 77, 50937 Koln.
    Haberer, D.
    Department of Chemistry, University of California at Berkeley, 699 Tan Hall, Berkeley, CA 94720, U.S.A..
    Farjam, M.
    School of Nano Science, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran, Iran.
    Simonov, Konstantin A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Preobrajenski, Alexei B.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Atodiresei, N.
    Peter Grunberg Institute and Institute for Advanced Simulation, Julich, Germany.
    Caciuc, V.
    Peter Grunberg Institute and Institute for Advanced Simulation, Julich, Germany.
    Blugel, S.
    Peter Grunberg Institute and Institute for Advanced Simulation, Julich, Germany.
    Rosch, A.
    Institute for Theoretical Physics, Universitat zu Koln, Zulpicher Strasse 77, 50937 Koln, Germany.
    Verbitskiy, N.I.
    Physikalisches Institut, Universitat zu Koln, Zulpicher Strasse 77, 50937 Koln.
    Hell, M.
    Physikalisches Institut, Universitat zu Koln, Zulpicher Strasse 77, 50937 Koln.
    Evtushinsky, D.V.
    Helmholtz-Zentrum Berlin fur Materialien und Energie, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin.
    German, R.
    Physikalisches Institut, Universitat zu Koln, Zulpicher Strasse 77, 50937 Koln.
    Marangoni, T.
    Department of Chemistry, University of California at Berkeley, 699 Tan Hall, Berkeley, CA 94720, U.S.A..
    van Loosdrecht, P.H.M.
    Physikalisches Institut, Universitat zu Koln, Zulpicher Strasse 77, 50937 Koln.
    Fischer, F.R.
    Department of Chemistry, University of California at Berkeley, 699 Tan Hall, Berkeley, CA 94720, U.S.A..
    Gruneis, A.
    Physikalisches Institut, Universitat zu Koln, Zulpicher Strasse 77, 50937 Koln.
    Giant Renormalization of the Quasiparticle Dispersion in Degenerately Doped Graphene NanoribbonsManuscript (preprint) (Other academic)
  • 7.
    Senkovskiy, Boris V.
    et al.
    Univ Cologne, Phys Inst 2, Zulpicher Str 77, D-50937 Cologne, Germany..
    Fedorov, Alexander V.
    Univ Cologne, Phys Inst 2, Zulpicher Str 77, D-50937 Cologne, Germany.;St Petersburg State Univ, Ulyanovskaya Ul 1, St Petersburg 198504, Russia.;IFW Dresden, Helmholtzstr 20, D-01069 Dresden, Germany..
    Haberer, Danny
    Univ Calif Berkeley, 699 Tan Hall, Berkeley, CA 94720 USA..
    Farjam, Mani
    Inst Res Fundamental Sci IPM, Sch Nano Sci, POB 19395-5531, Tehran, Iran..
    Simonov, Konstantin A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics. Lund Univ, MAX 4, Box 118, S-22100 Lund, Sweden..
    Preobrajenski, Alexei B.
    Lund Univ, MAX 4, Box 118, S-22100 Lund, Sweden..
    Mårtensson, Niels
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Atodiresei, Nicolae
    Forschungszentrum Julich, Peter Grunberg Inst PGI 1, D-52425 Julich, Germany.;Forschungszentrum Julich, Inst Adv Simulat IAS 1, D-52425 Julich, Germany.;JARA, D-52425 Julich, Germany..
    Caciuc, Vasile
    Forschungszentrum Julich, Peter Grunberg Inst PGI 1, D-52425 Julich, Germany.;Forschungszentrum Julich, Inst Adv Simulat IAS 1, D-52425 Julich, Germany.;JARA, D-52425 Julich, Germany..
    Bluegel, Stefan
    Forschungszentrum Julich, Peter Grunberg Inst PGI 1, D-52425 Julich, Germany.;Forschungszentrum Julich, Inst Adv Simulat IAS 1, D-52425 Julich, Germany.;JARA, D-52425 Julich, Germany..
    Rosch, Achim
    Univ Cologne, Inst Theoret Phys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Verbitskiy, Nikolay I.
    Univ Cologne, Phys Inst 2, Zulpicher Str 77, D-50937 Cologne, Germany.;Univ Vienna, Fac Phys, Strudlhofgasse 4, A-1090 Vienna, Austria.;Moscow MV Lomonosov State Univ, Dept Mat Sci, Leninskiye Gory 1-3, Moscow 119992, Russia..
    Hell, Martin
    Univ Cologne, Phys Inst 2, Zulpicher Str 77, D-50937 Cologne, Germany..
    Evtushinsky, Daniil V.
    Helmholtz Zentrum Berlin Mat & Energie Elektronen, Albert Einstein Str 15, D-12489 Berlin, Germany..
    German, Raphael
    Univ Cologne, Phys Inst 2, Zulpicher Str 77, D-50937 Cologne, Germany..
    Marangoni, Tomas
    Univ Calif Berkeley, 699 Tan Hall, Berkeley, CA 94720 USA..
    van Loosdrecht, Paul H. M.
    Univ Cologne, Phys Inst 2, Zulpicher Str 77, D-50937 Cologne, Germany..
    Fischer, Felix R.
    Univ Calif Berkeley, 699 Tan Hall, Berkeley, CA 94720 USA..
    Grueneis, Alexander
    Univ Cologne, Phys Inst 2, Zulpicher Str 77, D-50937 Cologne, Germany..
    Semiconductor-to-Metal Transition and Quasiparticle Renormalization in Doped Graphene Nanoribbons2017In: ADVANCED ELECTRONIC MATERIALS, ISSN 2199-160X, Vol. 3, no 4, article id 1600490Article in journal (Refereed)
    Abstract [en]

    A semiconductor-to-metal transition in N = 7 armchair graphene nanoribbons causes drastic changes in its electron and phonon system. By using angle-resolved photoemission spectroscopy of lithium-doped graphene nanoribbons, a quasiparticle band gap renormalization from 2.4 to 2.1 eV is observed. Reaching high doping levels (0.05 electrons per atom), it is found that the effective mass of the conduction band carriers increases to a value equal to the free electron mass. This giant increase in the effective mass by doping is a means to enhance the density of states at the Fermi level which can have palpable impact on the transport and optical properties. Electron doping also reduces the Raman intensity by one order of magnitude, and results in relatively small (4 cm(-1)) hardening of the G phonon and softening of the D phonon. This suggests the importance of both lattice expansion and dynamic effects. The present work highlights that doping of a semiconducting 1D system is strikingly different from its 2D or 3D counterparts and introduces doped graphene nanoribbons as a new tunable quantum material with high potential for basic research and applications.

  • 8.
    Simonov, Konstantin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Effect of Substrate on Bottom-Up Fabrication and Electronic Properties of Graphene Nanoribbons2016Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Taking into account the technological demand for the controlled preparation of atomically precise graphene nanoribbons (GNRs) with well-defined properties, the present thesis is focused on the investigation of the role of the underlying metal substrate in the process of building GNRs using bottom-up strategy and on the changes in the electronic structure of GNRs induced by the GNR-metal interaction. The combination of surface sensitive synchrotron-radiation-based spectroscopic techniques and scanning tunneling microscopy with in situ sample preparation allowed to trace evolution of the structural and electronic properties of the investigated systems.

    Significant impact of the substrate activity on the growth dynamics of armchair GNRs of width N = 7 (7-AGNRs) prepared on inert Au(111) and active Cu(111) was demonstrated. It was shown that unlike inert Au(111) substrate, the mechanism of GNRs formation on Ag(111) and Cu(111) includes the formation of organometallic intermediates based on the carbon-metal-carbon bonds. Experiments performed on Cu(111) and Cu(110), showed that a change of the balance between molecular diffusion and intermolecular interaction significantly affects the on-surface reaction mechanism making it impossible to grow GNRs on Cu(110).

    It was demonstrated that deposition of metals on spatially aligned GNRs prepared on stepped Au(788) substrate allows to investigate GNR-metal interaction using angle-resolved photoelectron spectroscopy. In particular intercalation of one monolayer of copper beneath 7-AGNRs leads to significant electron injection into the nanoribbons, indicating that charge doping by metal contacts must be taken into account when designing GNR/electrode systems. Alloying of intercalated copper with gold substrate upon post-annealing at 200°C leads to a recovery of the initial position of GNR-related bands with respect to the Fermi level, thus proving tunability of the induced n-doping. Contrary, changes in the electronic structure of 7-AGNRs induced by the deposition of Li are not reversible.  It is demonstrated that via lithium doping 7-AGNRs can be transformed from a semiconductor into a metal state due to the partial filling of the conduction band. The band gap of Li-doped GNRs is reduced and the effective mass of the conduction band carriers is increased.

  • 9.
    Simonov, Konstantin A.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Generalov, Alexander V.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Vinogradov, Alexander S.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Svirskiy, Gleb I.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Cafolla, Attilio A.
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Preobrajenski, Alexei B.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    On-Surface Growth of Graphene Nanoribbons via Organometallic IntermediatesManuscript (preprint) (Other academic)
  • 10.
    Simonov, Konstantin A.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics. MAX IV, Lund University, Box 118, 22100 Lund, Sweden.; St Petersburg State Univ, VA Fock Inst Phys, St Petersburg 198504, Russia.
    Vinogradov, Nikolay A.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.; St Petersburg State Univ, VA Fock Inst Phys, St Petersburg 198504, Russia.
    Vinogradov, Alexander S.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Generalov, Alexander V.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.; St Petersburg State Univ, VA Fock Inst Phys, St Petersburg 198504, Russia.
    Svirskiy, Gleb I.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Cafolla, Attilio A.
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Preobrajenski, Alexei B.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Effect of Electron Injection in Copper-Contacted Graphene Nanoribbons2016In: Nano Reseach, ISSN 1998-0124, E-ISSN 1998-0000, Vol. 9, no 9, p. 2735-2746Article in journal (Refereed)
    Abstract [en]

    For practical electronic device applications of graphene nanoribbons (GNRs), it is essential to have abrupt and well-defined contacts between the ribbon and the adjacent metal lead. By analogy with graphene, these contacts can induce electron or hole doping, which may significantly affect the I/V characteristics of the device. Cu is among the most popular metals of choice for contact materials. In this study, we investigate the effect of in situ intercalation of Cu on the electronic structure of atomically precise, spatially aligned armchair GNRs of width N = 7 (7-AGNRs) fabricated via a bottom-up method on the Au(788) surface. Scanning tunneling microscopy data reveal that the complete intercalation of about one monolayer of Cu under 7-AGNRs can be facilitated by gentle annealing of the sample at 80 A degrees C. Angle-resolved photoemission spectroscopy (ARPES) data clearly reflect the one-dimensional character of the 7-AGNR band dispersion before and after intercalation. Moreover, ARPES and core-level photoemission results show that intercalation of Cu leads to significant electron injection into the nanoribbons, which causes a pronounced downshift of the valence and conduction bands of the GNR with respect to the Fermi energy (Delta E similar to 0.5 eV). As demonstrated by ARPES and X-ray absorption spectroscopy measurements, the effect of Cu intercalation is restricted to n-doping only, without considerable modification of the band structure of the GNRs. Post-annealing of the 7-AGNRs/Cu/Au(788) system at 200 A degrees C activates the diffusion of Cu into Au and the formation of a Cu-rich surface Au layer. Alloying of intercalated Cu leads to the recovery of the initial position of GNR-related bands with respect to the Fermi energy (E (F)), thus, proving the tunability of the induced n-doping.

  • 11.
    Simonov, Konstantin A.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Vinogradov, Nikolay A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Vinogradov, Alexander S.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Generalov, Alexander V.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Zagrebina, Elena M.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Cafolla, Attilio A.
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Carpy, Thomas
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Cunniffe, John P.
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Preobrajenski, Alexei B.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Comment on "Bottom-Up Graphene-Nanoribbon Fabrication Reveals Chiral Edges and Enantioselectivity"2015In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 9, no 4, p. 3399-3403Article in journal (Refereed)
  • 12.
    Simonov, Konstantin A.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Vinogradov, Nikolay A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Vinogradov, Alexander S.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Generalov, Alexander V.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Zagrebina, Elena M.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Cafolla, Attilio A.
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Carpy, Tomas
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Cunniffe, John P.
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Preobrajenski, Alexei B.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Effect of Substrate Chemistry on the Bottom-Up Fabrication of Graphene Nanoribbons: Combined Core-Level Spectroscopy and STM Study2014In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 118, no 23, p. 12532-12540Article in journal (Refereed)
    Abstract [en]

    Atomically precise graphene nanoribbons (GNRs) can be fabricated via thermally induced polymerization of halogen containing molecular precursors on metal surfaces. In this paper the effect of substrate reactivity on the growth and structure of armchair GNRs (AGNRs) grown on inert Au(111) and active Cu(111) surfaces has been systematically studied by a combination of core-level X-ray spectroscopies and scanning tunneling microscopy. It is demonstrated that the activation threshold for the dehalogenation process decreases with increasing catalytic activity of the substrate. At room temperature the 10,10'-dibromo-9,9'-bianthracene (DBBA) precursor molecules on Au(111) remain intact, while on Cu(111) a complete surface-assisted dehalogenation takes place. Dehalogenation of precursor molecules on Au(111) only starts at around 80 degrees C and completes at 200 degrees C, leading to the formation of linear polymer chains. On Cu(111) tilted polymer chains appear readily at room temperature or slightly elevated temperatures. Annealing of the DBBA/Cu(111) above 100 degrees C leads to intramolecular cyclodehydrogenation and formation of flat AGNRs at 200 degrees C, while on the Au(111) surface the formation of GNRs takes place only at around 400 degrees C. In STM, nanoribbons have significantly reduced apparent height on Cu(111) as compared to Au(111), 70 +/- 11 pm versus 172 +/- 14 pm, independently of the bias voltage. Moreover, an alignment of GNRs along low-index crystallographic directions of the substrate is evident for Cu(111), while on Au(111) it is more random. Elevating the Cu(111) substrate temperature above 400 degrees C results in a dehydrogenation and subsequent decomposition of GNRs; at 750 degrees C the dehydrogenated carbon species self-organize in graphene islands. In general, our data provide evidence for a significant influence of substrate reactivity on the growth dynamics of GNRs.

  • 13.
    Simonov, Konstantin A.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Vinogradov, Nikolay A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Vinogradov, Alexander S.
    St Petersburg State Univ, VA Fock Inst Phys, St Petersburg 198504, Russia..
    Generalov, Alexander V.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Zagrebina, Elena M.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Svirskiy, Gleb I.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Cafolla, Attilio A.
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Carpy, Thomas
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Cunniffe, John P.
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Taketsugu, Tetsuya
    Hokkaido University, Faculty of Science, Deptaprtment of Chemistry, Sapporo, Hokkaido 0600810, Japan.
    Lyalin, Andrey
    Global Research Center for Environmental & Energy Based Nanomaterials Science, Tsukuba, Ibaraki 3050044, Japan..
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Preobrajenski, Alexei B.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    From Graphene Nanoribbons on Cu(111) to Nanographene on Cu(110): Critical Role of Substrate Structure in the Bottom-Up Fabrication Strategy2015In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 9, no 9, p. 8997-9011Article in journal (Refereed)
    Abstract [en]

    Bottom-up strategies can be effectively implemented for the fabrication of atomically precise graphene nanoribbons. Recently, using 10,10'-dibromo-9,9'-bianthracene (DBBA) as a molecular precursor to grow armchair nanoribbons on Au(111) and Cu(111), we have shown that substrate activity considerably affects the dynamics of ribbon formation, nonetheless without significant modifications in the growth mechanism. In this paper we compare the on-surface reaction pathways for DBBA molecules on Cu(111) and Cu(110). Evolution of both systems has been studied via a combination of core-level X-ray spectroscopies, scanning tunneling microscopy, and theoretical calculations. Experimental and theoretical results reveal a significant increase in reactivity for the open and anisotropic Cu(110) surface in comparison with the close-packed Cu(111). This increased reactivity results in a predominance of the molecular substrate interaction over the intermolecular one, which has a critical impact on the transformations of DBBA on Cu(110). Unlike DBBA on Cu(111), the Ullmann coupling cannot be realized for DBBA/Cu(110) and the growth of nanoribbons via this mechanism is blocked. Instead, annealing of DBBA on Cu(110) at 250 degrees C results in the formation of a new structure: quasi-zero-dimensional flat nanographenes. Each nanographene unit has dehydrogenated zigzag edges bonded to the underlying Cu rows and oriented with the hydrogen-terminated armchair edge parallel to the [1-10] direction. Strong bonding of nanographene to the substrate manifests itself in a high adsorption energy of -12.7 eV and significant charge transfer of 3.46e from the copper surface. Nanographene units coordinated with bromine adatoms are able to arrange in highly regular arrays potentially suitable for nanotemplating.

  • 14.
    Simonov, Konstantin
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics. Lund Univ, MAX Lab 4, Box 118, S-22100 Lund, Sweden.;St Petersburg State Univ, VA Fock Inst Phys, St Petersburg 198504, Russia..
    Generalov, A. V.
    Lund Univ, MAX Lab 4, Box 118, S-22100 Lund, Sweden..
    Vinogradov, A. S.
    St Petersburg State Univ, VA Fock Inst Phys, St Petersburg 198504, Russia..
    Svirskiy, G. I.
    St Petersburg State Univ, VA Fock Inst Phys, St Petersburg 198504, Russia..
    Cafolla, A. A.
    Dublin City Univ, Sch Phys Sci, Dublin D09, Ireland..
    McGuinness, C.
    Trinity Coll Dublin, Sch Phys, Coll Green, Dublin D02, Ireland..
    Taketsugu, T.
    Hokkaido Univ, Fac Sci, Dept Chem, Sapporo, Hokkaido 0600810, Japan.;NIMS, Global Res Ctr Environm & Energy Based Nanomat Sc, Tsukuba, Ibaraki 3050044, Japan..
    Lyalin, A.
    NIMS, Global Res Ctr Environm & Energy Based Nanomat Sc, Tsukuba, Ibaraki 3050044, Japan..
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Preobrajenski, A. B.
    Lund Univ, MAX Lab 4, Box 118, S-22100 Lund, Sweden..
    Synthesis of armchair graphene nanoribbons from the 10,10 '-dibromo-9,9 '-bianthracene molecules on Ag(111): the role of organometallic intermediates2018In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 8, article id 3506Article in journal (Refereed)
    Abstract [en]

    We investigate the bottom-up growth of N = 7 armchair graphene nanoribbons (7-AGNRs) from the 10,10'-dibromo-9,9'-bianthracene (DBBA) molecules on Ag(111) with the focus on the role of the organometallic (OM) intermediates. It is demonstrated that DBBA molecules on Ag(111) are partially debrominated at room temperature and lose all bromine atoms at elevated temperatures. Similar to DBBA on Cu(111), debrominated molecules form OM chains on Ag(111). Nevertheless, in contrast with the Cu(111) substrate, formation of polyanthracene chains from OM intermediates via an Ullmann-type reaction is feasible on Ag(111). Cleavage of C-Ag bonds occurs before the thermal threshold for the surface-catalyzed activation of C-H bonds on Ag(111) is reached, while on Cu(111) activation of C-H bonds occurs in parallel with the cleavage of the stronger C-Cu bonds. Consequently, while OM intermediates obstruct the Ullmann reaction between DBBA molecules on the Cu(111) substrate, they are required for the formation of polyanthracene chains on Ag(111). If the Ullmann-type reaction on Ag(111) is inhibited, heating of the OM chains produces nanographenes instead. Heating of the polyanthracene chains produces 7-AGNRs, while heating of nanographenes causes the formation of the disordered structures with the possible admixture of short GNRs.

  • 15.
    Simonov, Konstantin
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Vinogradov, Nikolay A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Vinogradov, Alexander S.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Generalov, Alexander V.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Zagrebina, Elena M.
    V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia.
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Cafolla, Attilio A.
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Carpy, Tomas
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Cunniffe, John P.
    School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
    Preobrajenski, Alexei B.
    MAX IV, Lund University, Box 118, 22100 Lund, Sweden.
    Correction to “Effect of Substrate Chemistry on the Bottom-Up Fabrication of Graphene Nanoribbons: Combined Core-Level Spectroscopy and STM Study”2015In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 119, no 1, p. 880-881Article in journal (Refereed)
  • 16.
    Svirskiy, G. I.
    et al.
    St Petersburg State Univ, St Petersburg, Russia.
    Generalov, A. V.
    St Petersburg State Univ, St Petersburg , Russia; Lund Univ, MAX Lab 4, Lund, Sweden.
    Klyushin, A. Yu
    St Petersburg State Univ, St Petersburg, Russia; Helmholtz Zentrum Berlin, Res Grp Catalysis Energy, Berlin, Germany; Max Planck Gesell, Dept Inorgan Chem, Fritz Haber Inst, Berlin, Germany.
    Simonov, Konstantin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics. St Petersburg State Univ, St Petersburg, Russia; Lund Univ, MAX Lab 4, Lund, Sweden.
    Krasnikov, S. A.
    St Petersburg State Univ, St Petersburg, Russia; Dublin City Univ, Sch Phys Sci, Dublin, Ireland.
    Vinogradov, N. A.
    St Petersburg State Univ, St Petersburg, Russia; Lund Univ, MAX Lab 4, Lund, Sweden.
    Trigub, A. L.
    Natl Res Ctr Kurchatov Inst, Moscow, Russia.
    Zubavichus, Ya V.
    Natl Res Ctr Kurchatov Inst, Moscow, Russia.
    Preobrazhenski, A. B.
    St Petersburg State Univ, St Petersburg, Russia; Lund Univ, MAX Lab 4, Lund, Sweden.
    Vinogradov, A. S.
    St Petersburg State Univ, St Petersburg, Russia.
    Comparative X-Ray Absorption Analysis of the Spectrum of Vacant Electronic States in Cobalt and Nickel Tetraphenylporphyrin Complexes2018In: Physics of the solid state, ISSN 1063-7834, E-ISSN 1090-6460, Vol. 60, no 3, p. 581-591Article in journal (Refereed)
    Abstract [en]

    The energy distributions and the properties of the lower vacant electronic states in cobalt and nickel tetraphenylporphyrin complexes CoTPP and NiTPP are studied by X-ray absorption spectroscopy. Quasimolecular analysis of the experimental absorption spectra measured in the region of the 2p and 1s ionization thresholds of complexing metal atoms, as well as the 1s thresholds of ligand atoms (nitrogen and carbon), is based on the comparison of the corresponding spectra with each other and with the spectra of the simplest nickel porphyrin NiP. It has been established that, despite a general similarity of the spectra of nitrogen and carbon in CoTPP and NiTPP, the fine structure of the 2p and 1s absorption spectra of cobalt and nickel atoms are radically different. The observed differences in the spectra of cobalt and nickel are associated with the features of the energy distribution of vacant 3d electron states. The presence in CoTPP of the partially filled valence 3db2g molecular orbital (MO) results in the appearance in the cobalt spectra of a low-energy band, which is absent in the spectrum of nickel in NiTPP and leads to a doublet structure of transitions to b1g and e g MOs due to the exchange interaction between 3d electrons in partially filled 3db2g and 3db1g or 3de g MOs. The spectrum of vacant states in CoTPP differs from that in NiTPP also due to the smaller energy distance between 3db1g and e g MOs and the different positions of nonbonding MOs with the C2p character of the porphine ligand.

  • 17.
    Vinogradov, Nikolay
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Simonov, Konstantin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Zakharov, Alexei
    MAX-Lab, Lund University.
    Wells, Justin
    MAX-Lab, Lund University.
    Generalov, Alexander
    Vinogradov, Alexander
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Preobrajenski, Alexei
    MAX-Lab, Lund University.
    Hole doping of graphene supported on Ir(111) by AlBr32013In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 102, no 6, p. 061601-Article in journal (Refereed)
    Abstract [en]

    In this Letter we report an easy and tenable way to tune the type of charge carriers in graphene, using a buried layer of AlBr3 and its derivatives on the graphene/Ir(111) interface. Upon the deposition of AlBr3 on graphene/Ir(111) and subsequent temperature-assisted intercalation of graphene/Ir(111) with atomic Br and AlBr3, pronounced hole doping of graphene is observed. The evolution of the graphene/Br-AlBr3/Ir(111) system at different stages of intercalation has been investigated by means of microbeam low-energy electron microscopy/electron diffraction, core-level photoelectron spectroscopy and angle-resolved photoelectron spectroscopy.

  • 18. Zagrebina, Elena M.
    et al.
    Generalov, Alexander V.
    Klyushin, Alexander Yu
    Simonov, Konstantin A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Vinogradov, Nikolay A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Dubois, Marc
    Frezet, Lawrence
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Preobrajenski, Alexei B.
    Vinogradov, Alexander S.
    Comparative NEXAFS, NMR, and FTIR Study of Various-Sized Nanodiamonds: As-Prepared and Fluorinated2015In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 119, no 1, p. 835-844Article in journal (Refereed)
1 - 18 of 18
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