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Growth of semi-coherent Ni and NiO dual-phase nanoparticles using hollow cathode sputtering
Linköping University, Department of Physics, Chemistry and Biology, Plasma and Coating Physics. Linköping University, Faculty of Science & Engineering.
Tokyo Metropolitan Univ, Japan.
Linköping University, Department of Physics, Chemistry and Biology, Plasma and Coating Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-6602-7981
Tokyo Metropolitan Univ, Japan.
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2019 (English)In: Journal of nanoparticle research, ISSN 1388-0764, E-ISSN 1572-896X, Vol. 21, no 2, article id 37Article in journal (Refereed) Published
Abstract [en]

Anisotropic heterogenous Ni/NiO nanoparticles with controlled compositions are grown using a high-power pulsed hollow cathode process. These novel particles can be tuned to consist of single-phase Ni via two-phase Ni/NiO to fully oxidized NiO, with a size range of 5-25 nm for individual crystals. A novelty of this approach is the ability to assemble multiple particles of Ni and NiO into a single complex structure, increasing the Ni-NiO interface density. This type of particle growth is not seen before and is explained to be due to the fact that the process operates in a single-step approach, where both Ni and O can arrive at the formed nanoparticle nuclei and aid in the continuous particle growth. The finished particle will then be a consequence of the initially formed crystal, as well as the arrival rate ratio of the two species. These particles hold great potential for applications in fields, such as electro- and photocatalysis, where the ability to control the level of oxidation and/or interface density is of great importance.

Place, publisher, year, edition, pages
SPRINGER , 2019. Vol. 21, no 2, article id 37
Keywords [en]
Ni; NiO; Anisotropic; Nanoparticles; Hollow cathode; Nanoparticle assembly
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-154838DOI: 10.1007/s11051-019-4479-4ISI: 000458657800001OAI: oai:DiVA.org:liu-154838DiVA, id: diva2:1294592
Note

Funding Agencies|Knut and Alice Wallenberg Foundation [KAW 2014.0276]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]; Tokyo Metropolitan University; Linkoping University

Available from: 2019-03-07 Created: 2019-03-07 Last updated: 2019-09-06
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