A Two-Layer Gold Surface with Improved Surface Enhancement for Spectro-Electrochemistry Using Surface-Enhanced Infrared Absorption Spectroscopy
A Two-Layer Gold Surface with Improved Surface Enhancement for Spectro-Electrochemistry Using Surface-Enhanced Infrared Absorption Spectroscopy
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DOI：
10.1366/000370209789379330
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发表时间：
2009-09-01
影响因子：
3.5
通讯作者：
Naumann, R. L. C.
中科院分区：
文献类型：
--
作者：
Nowak, C.;Luening, C.;Naumann, R. L. C.
开发了一种用于表面增强红外吸收光谱(SEIRAS)的双层金表面，该表面由导电底层组成，在其上通过自催化化学沉积生长纳米颗粒(AuNPs)。在25 nm薄衬底的突出子结构上生长了AuNPs。双层金表面的增强因子受生长条件的控制。细胞色素c被吸附在硫醇的自组装单分子膜上作为参比体系。在最佳条件下，酰胺I带的吸光度比经典的SEIRAS表面增加了5倍。用循环伏安法研究了细胞色素c在双层金表面的可逆还原/氧化过程。
A two-layer gold surface is developed for use with surface-enhanced infrared absorption spectroscopy (SEIRAS) consisting of a conducting underlayer onto which An nanoparticles (AuNPs) are grown by self-catalyzed electroless deposition. AuNPs are grown on protruding substructures of the 25 nm thin underlayer. The enhancement factor of the two-layer gold surface is controlled by the growth conditions. Cytochrome c adsorbed to a self-assembled monolayer of mercaptoethanol is used as a reference system. Under optimum conditions the absorbance of the amide I band is increased by a factor of 5 versus the classical SEIRAS surface. Reversible reduction/oxidation of cytochrome c on the two-layer gold surface is shown to take place by cyclic voltammetry.