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Electronically Tunable Properties of Nanocrystalline Metals

Harald Drings ,  Joerg Weissmueller 

Forschungszentrum Karlsruhe, Institut für Nanotechnologie, Herrmann-von-Helmholtz-Platz 1, Karlsruhe 76344, Germany


Drings1, Raghavan Nadar Viswanath1, Roland Würschum2, Jörg
Weissmüller1 and Herbert Gleiter1 - 1 Forschungszentrum Karlsruhe,
Institute for Nanotechnology Postfach 3640 76021 Karlsruhe,Germany,Tel
+49-7247-82-6378, Fax +49-7247-82-6368 - 2 Technical University of
Graz, Institute for Technical Physics, Petersgasse 16, A-8010 Graz,

The surface charge density of materials can be influenced by an
externally applied field [1]. Due to the large fraction of surface
atoms in nanocrystalline (n-) materials, a field-induced variation in
the surface charge density should lead to a reversible change of
structural and physical properties. To verify this assumption, in-situ
measurements of the lattice parameter d of n-Pt and the magnetic
susceptibility of n-Pd, in dependence of charging, were performed.
Electrochemical double layer formation in an electrochemical cell was
used for charging. Reversible changes of the lattice parameter and the
magnetic susceptibility were observed.


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Presentation: oral at E-MRS Fall Meeting 2002, by Harald Drings
See On-line Journal of E-MRS Fall Meeting 2002

Submitted: 2003-02-16 17:33
Revised:   2009-06-08 12:55