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

Journal article
(Original article)

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
Journal: Journal of Physical Chemistry C
Publication year: 2016
Volume: 120
Journal issue: 35
Pages range: 19848-19855
ISSN: 1932-7447
eISSN: 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.

FAU Authors / FAU Editors

Heiß, Wolfgang Prof. Dr.
Department Werkstoffwissenschaften
Heiß, Wolfgang Prof. Dr.
Professur für Werkstoffwissenschaften (lösungsprozessierte Halbleitermaterialien)

External institutions with authors

Deutsches Elektronen-Synchrotron DESY
Johannes Kepler Universität (JKU) Linz
Karlsruhe Institute of Technology (KIT)

How to cite

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.

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


Last updated on 2019-24-05 at 09:49