Galvanic Exchange in Colloidal Metal/Metal-Oxide Core/Shell Nanocrystals

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10327278" target="_blank" >RIV/00216208:11320/16:10327278 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/acs.jpcc.6b06405" target="_blank" >http://dx.doi.org/10.1021/acs.jpcc.6b06405</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpcc.6b06405" target="_blank" >10.1021/acs.jpcc.6b06405</a>

Result language
angličtina
Original language name
Galvanic Exchange in Colloidal Metal/Metal-Oxide Core/Shell Nanocrystals
Original language description
While galvanic exchange is commonly applied to metallic nanoparticles, recently its applicability was expanded to metal-oxides. Here the galvanic exchange is studied in metal/metal-oxide core/shell nanocrystals. In particular Sn/SnO2 is treated by Ag+, Pt2+, Pt4+, and Pd2+. The conversion dynamics is monitored by in situ synchrotron X-ray diffraction. The Ag+ treatment converts the Sn cores to the intermetallic AgxSn (x similar to 4) phase, by changing the core's crystal structure. For the analogous treatment by Pt2+, Pt4+, and Pd2+, such a galvanic exchange is not observed. This different behavior is caused by the semipermeability of the naturally formed SnO2 shell; which allows diffusion of Ag+ but protects the nanocrystal cores from oxidation by Pt and Pd ions.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
<a href="/en/project/GA14-08124S" target="_blank" >GA14-08124S: High-resolution x-ray diffraction from random layered systems</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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