کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
197005 | 459867 | 2005 | 13 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Second harmonic generation from Ag(1 1 1) electrochemical interfaces at the interband transition region: Effects of the presence of self-assembled monolayers Second harmonic generation from Ag(1 1 1) electrochemical interfaces at the interband transition region: Effects of the presence of self-assembled monolayers](/preview/png/197005.png)
We have investigated the wavelength and potential dependence of the second harmonic response from Ag(1 1 1) surfaces covered by self-assembled monolayers (SAMs) obtained from two different α-functionalised terthiophenes in comparison with bare surfaces in the spectral region where interband transitions can occur. We have analysed both isotropic and anisotropic components of the second harmonic signal at different directions of the polarisation. A strong dependence on the potential, the wavelength and the nature of the film has been observed. Our results are consistent with those of Bradley et al. for bare surfaces and give additional evidence that the enhancement of the second harmonic process observed is mainly caused by a resonance with some elements of the surface susceptibility tensor.
Journal: Electrochimica Acta - Volume 50, Issues 25–26, 5 September 2005, Pages 4837–4849