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Polycation stabilization of graphene suspensions
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
Acreo AB.
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-6235-7038
2011 (English)In: Nanoscale Research Letters, ISSN 1931-7573, Vol. 6, no 493Article in journal (Refereed) Published
Abstract [en]

Graphene is a leading contender for the next-generation electronic devices. We report a method to produce graphene membranes in the solution phase using polymeric imidazolium salts as a transferring medium. Graphene membranes were reduced from graphene oxides by hydrazine in the presence of the polyelectrolyte which is found to be a stable and homogeneous dispersion for the resulting graphene in the aqueous solution. A simple device with gold contacts on both sides was fabricated in order to observe the electronic properties.

Place, publisher, year, edition, pages
SpringerOpen , 2011. Vol. 6, no 493
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-72038DOI: 10.1186/1556-276X-6-493ISI: 000296254800001OAI: diva2:455965
Available from: 2011-11-11 Created: 2011-11-11 Last updated: 2014-01-15Bibliographically approved
In thesis
1. Graphene and ZnO Nanostructures for Nano- Optoelectronic & Biosensing Applications
Open this publication in new window or tab >>Graphene and ZnO Nanostructures for Nano- Optoelectronic & Biosensing Applications
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

There has been a remarkable excitement in graphene research since the famous discovery in 2004 by isolating a monolayer with the help of scotch tape. Graphene, merely a single layer of carbon atoms, is progressively making inroads into a wide range of applications, from ballistic electronics to biosensors to flexible/transparent displays. Graphene is a matchless material that is strong, light, transparent, and an excellent conductor of heat and electricity. On the other hand, zinc oxide (ZnO) is a wide band semiconductor that demonstrates excellent electrical, optical, catalytic and sensing properties and has numerous applications in various fields. ZnO is a natural n-type semiconductor due to the presence of intrinsic defects such as Zn interstitials and O vacancies that also contribute strongly to optical emissions in the visible region.

The amalgamation of the exceptional properties of graphene with good semiconducting properties of ZnO can pave the way towards the realization of future devices (LED, biosensors, photovoltaics etc.).

In this thesis, graphene nanosheets and zinc oxide (ZnO) nanostructures have beensuccessfully synthesized by using chemical vapor deposition (CVD), vapor liquidsolid (VLS) or wet chemistry routines. These nanostructures were used to fabricatenano and optoelectronic devices, including field effect transistors (FETs), lightemitting diodes (LEDs), UV detectors and biosensors. Both nanomaterial’s propertiesand performances of the devices have been characterized and reported.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2012. 80 p.
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1458
National Category
Natural Sciences
urn:nbn:se:liu:diva-78697 (URN)978-91-7519-869-9 (ISBN)
Public defence
2012-05-29, K3, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 10:15 (English)
Available from: 2012-06-18 Created: 2012-06-18 Last updated: 2014-01-15Bibliographically approved

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