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An in situ study of reconstructed gold electrode surfaces by second harmonic generation

✍ Scribed by A. Friedrich; B. Pettinger; D.M. Kolb; G. Lüpke; R. Steinhoff; G. Marowsky

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
513 KB
Volume
163
Category
Article
ISSN
0009-2614

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✦ Synopsis

Second harmonic generation (SHG) was employed to monitor in situ the potential-induced reconstruction of Au( 111) and Au( 100) electrodes. Rotating the sample by 360" about the surface normal yields for the unreconstructed Au( 1 I1 )-( 1 x 1) SWface the well-known threefold symmetry pattern in the SHG intensity, while Au( lOO)-(1 X 1) shows no rotational anisotropy, as expected for C, symmetry. For the reconstructed Au( 1 I I )-( 1 X 23) surface, however, an additional onefold symmetry pattern is observed, which allows in situ monitoring of the structural transition between ( I X 1) and (1 X23). For the reconstructed Au( lOO)-( 5x20) surface, a threefold symmetry pattern was found.

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