TY  - JOUR
AU  - García, S. G.
AU  - Salinas, D. R.
AU  - Mayer, C. E.
AU  - Lorenz, W. J.
AU  - Staikov, G.
TI  - STM Tip-Induced Local Electrochemical Dissolution of Silver
JO  - Electrochimica acta
VL  - 48
SN  - 0013-4686
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - PreJuSER-32207
SP  - 1279 - 1285
PY  - 2003
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000181814400018
DO  - DOI:10.1016/S0013-4686(02)00836-8
UR  - https://juser.fz-juelich.de/record/32207
ER  -