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Interference second harmonic anisotropy at single crystalline silver-electrodes

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Pettinger,  Bruno
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Bilger,  Christoph
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Pettinger, B., Bilger, C., Beltramo, G., Santos, E., & Schmickler, W. (1998). Interference second harmonic anisotropy at single crystalline silver-electrodes. Electrochimica Acta, 44(44), 897-901. doi:10.1016/S0013-4686(98)00192-3.


Cite as: https://hdl.handle.net/21.11116/0000-0006-F6A6-9
Abstract
Using a new approach, the interference SHG anisotropy, it is possible to unambiguously evaluate the nonlinear susceptibility coefficients, which describe the isotropic and anisotropic response of a metal electrode. We report on a first application of this method to single crystalline silver electrodes in a 50 mM aqueous solution of NaClO4. The isotropic coefficient a shows the strongest dependence on the electrode potential. Theory predicts that the real part ar=Re(a) should have a minimum near the potential of zero charge. A normalized plot of ar vs. the surface charge density σ shows a good agreement between experiment and theory in the range −20 μC cm−2<σ<20 μC cm−2.