Journal Article

PreJuSER-32207

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png STM Tip-Induced Local Electrochemical Dissolution of Silver

García, S. G. ; Salinas, D. R. ; Mayer, C. E. ; Lorenz, W. J. ; Staikov, G.FZJ*

2003
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/S0013-4686(02)00836-8

Abstract: Local dissolution/deposition processes under in situ scanning tunneling microscopy (STM) imaging conditions are studied in the systems Ag(111)/Ag+, ClO4- and Ag(111)/Ag+, SO42-. The results show that in both systems the local kinetics of these processes strongly depend on the polarization conditions. At STM-tip potentials more positive than the Ag/Ag+ equilibrium potential, a local dissolution of the Ag(111) substrate is observed even at cathodic substrate overpotentials at which the overall substrate current density is cathodic. This tip-induced Ag dissolution is in agreement with results obtained recently in the system Cu((111))/Cu2+. The enhanced local Ag dissolution is explained by a reduced Ag+ concentration underneath the STM tip promoted by both an electrostatic repulsion of Ag+ and a reduction of the mass transport due to the shielding effect of the tip. The possibility for a preparation of negative Ag nanostructures by STM tip-induced electrochemical dissolution is demonstrated. (C) 2003 Elsevier Science Ltd. All rights reserved.

Keyword(s): J ; silver (auto) ; STM (auto) ; tip-induced dissolution (auto) ; local etching (auto) ; nanostructuring (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut für Grenzflächen und Vakuumtechnologien (ISG-3)

Research Program(s):

1. Materialien, Prozesse und Bauelemente für die Mikro- und Nanoelektronik (I01)

Appears in the scientific report 2003

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