Bistability in the surface dipole of silicon grafted with copper nanoparticles: An in-situ electrochemical MIR-FTIR study

作者：Kamiya Kazuhide; Tsuji Etsushi; Imanishi Akihito; Hashimoto Kazuhito; Nakanishi Shuji^*

来源：Electrochemistry Communications, 2011, 13(12): 1447-1450.

DOI：10.1016/j.elecom.2011.09.027

• Surface dipole
• Flatband potential
• Bistable
• Autocatalysis
• Copper nanoparticles

Bistable (hysteretic) behavior was observed in the current vs. potential relationship of p-type silicon grafted with copper nanoparticles in hydrofluoric acid. In-situ multiple-internal-reflectance FTIR spectroscopy indicated that the silicon surface is hydroxyl- (Si - OH) or partially fluorine-terminated (Si F) in response to the bistability. It is considered that autocatalytic chemical reactions in which the shift of flat-band potential of silicon coupled with the change of the surface termination plays a key role in the observed bistability.

• 出版日期2011-12