Journal article
(Original article)

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

Publication Details
Author(s): Kriegner D, Sytnyk M, Groiss H, Yarema M, Grafeneder W, Walter P, Dippel AC, Meffert M, Gerthsen D, Stangl J, Heiß W, Heiß W
Publication year: 2016
Volume: 120
Journal issue: 35
Pages range: 19848-19855
ISSN: 1932-7455
Language: English


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/SnO is treated by Ag, Pt, Pt, and Pd. The conversion dynamics is monitored by in situ synchrotron X-ray diffraction. The Ag treatment converts the Sn cores to the intermetallic AgSn (x ∼ 4) phase, by changing the core's crystal structure. For the analogous treatment by Pt, Pt, and Pd, such a galvanic exchange is not observed. This different behavior is caused by the semipermeability of the naturally formed SnO shell, which allows diffusion of Ag but protects the nanocrystal cores from oxidation by Pt and Pd ions.

How to cite
APA: Kriegner, D., Sytnyk, M., Groiss, H., Yarema, M., Grafeneder, W., Walter, P.,... Heiß, W. (2016). Galvanic Exchange in Colloidal Metal/Metal-Oxide Core/Shell Nanocrystals. Journal of Physical Chemistry C, 120(35), 19848-19855.

MLA: Kriegner, Dominik, et al. "Galvanic Exchange in Colloidal Metal/Metal-Oxide Core/Shell Nanocrystals." Journal of Physical Chemistry C 120.35 (2016): 19848-19855.

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