Nanoporous Copper with Tunable Nanoporosity for SERS Applications
Nanoporous Copper with Tunable Nanoporosity for SERS Applications
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DOI：
10.1002/adfm.200801239
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发表时间：
2009-04-23
影响因子：
19
通讯作者：
Chen, Ming-Wei
中科院分区：
文献类型：
--
作者：
Chen, Lu-Yang;Yu, Jin-Shan;Chen, Ming-Wei
纳米技术的实际应用非常需要具有可设计的微观结构和可控的物理和化学性质的纳米结构材料。在这篇文章中，据报道，可以通过控制脱合金过程来制造具有可调纳米孔径的纳米孔铜。系统地研究了酸浓度和蚀刻电位对纳米孔隙形成的影响。在最佳蚀刻条件下，通过控制脱合金时间，可以将纳米孔尺寸从大约 15 纳米调整到大约 120 纳米。研究发现，可调节的纳米孔隙率导致纳米多孔铜的表面增强拉曼散射（SERS）显着改善，并且在孔径约为 30-50 nm 时观察到罗丹明 6G 和结晶紫 1 OB 分子的 SERS 增强峰值。这项研究强调了复杂的三维纳米结构对物理和化学性质的影响，有助于开发用于分子诊断敏感仪器的廉价 SERS 基底。
Nanostructured materials with designable microstructure and controllable physical and chemical properties are highly desired for practical applications in nanotechnology. In this article, it is reported that nanoporous copper with a tunable nanopore size can be fabricated by controlling the dealloying process. The influence of acid concentration and etching potential on the formation of nanoprosity is systematically investigated. With optimal etching conditions, the nanopore sizes can be tailored from similar to 15 to similar to 120 nm by controlling the dealloying time. It is found that the tunable nanoporosity leads to significant improvements in surface-enhanced Raman scattering (SERS) of nanoporous copper and peak values of SERS enhancements for both rhodamine 6G and crystal violet l OB molecules are observed at a pore size of similar to 30-50 nm. This study underscores the effect of complex three-dimensional nanostructures on physical and chemical properties and is helpful in developing inexpensive SERS substrates for sensitive instrumentations in molecular diagnostics.