有序金纳米阵列的可控制备及其表面增强拉曼光谱

doi:10.3969/j.issn.1007-2861.2013.05.008

上海大学学报(自然科学版) ›› 2013, Vol. 13 ›› Issue (5): 479-484.doi: 10.3969/j.issn.1007-2861.2013.05.008

有序金纳米阵列的可控制备及其表面增强拉曼光谱

周懿, 付群, 王沙沙, 张鸿超, 雷波, 雷勇, 吴明红

上海大学环境与化学工程学院, 上海 200444

收稿日期:2013-04-09 出版日期:2013-10-28 发布日期:2013-10-28
通讯作者: 吴明红(1968–), 女, 教授, 博士生导师, 研究方向为辐射化学和纳米器件研究. E-mail: mhwu@staff.shu.edu.cn E-mail:mhwu@staff.shu.edu.cn
作者简介:吴明红(1968–), 女, 教授, 博士生导师, 研究方向为辐射化学和纳米器件研究. E-mail: mhwu@staff.shu.edu.cn
基金资助:
国家自然科学基金资助项目(41073073); 国家杰出青年科学基金资助项目(11025526)

Controlled Fabrication of Highly Ordered Au Nanoarrays as SERS Active Substrates

ZHOU Yi, FU Qun, WANG Sha-sha, ZHANG Hong-chao, LEI Bo, LEI Yong, WU Ming-hong

School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

Received:2013-04-09 Online:2013-10-28 Published:2013-10-28

摘要/Abstract

摘要： 介绍了一种大面积规则有序、结构可控、灵敏度高、稳定性良好、制备方法简单且易操作的表面增强拉曼散射(surface-enhanced Raman scattering, SERS) 活性基底. 以阳极氧化铝(anodic aluminum oxide, AAO) 模板一次氧化后形成的有序凹坑阵列为模板, 采用真空镀膜技术, 制备了有序的金纳米帽阵列SERS 活性基底, 并以罗丹明6G (Rhodamine 6G , R6G) 为探针分子, 测试和分析了该SERS 活性基底的表面增强拉曼光谱的特性. 结果表明, 这种SERS 活性基底对罗丹明6G 的拉曼散射信号可达到10⁷, 具有较好的增强作用. 该纳米帽阵列结构在1 363 cm⁻¹处的增强效果是相同厚度的普通金膜的7 倍, 且稳定性良好, 并且在放置6 个月之后, 其增强效果基本不变, 可用于化学物质和生物分子的痕量分析.

关键词: 表面增强拉曼散射, 稳定性, 有序金纳米帽, 增强因子, AAO 模板

Abstract: A simple and versatile method for fabricating surface-enhanced Raman scattering (SERS) active substrate with high uniformity, structural controllability, high sensitivity and great stability is reported. The ordered aluminum template formed during the synthesis of anodic aluminum oxide (AAO) film was used as the
concaved matrix. Au nanocap arrays as SERS active substrates were prepared through thermally evaporation. Taking Rhodamine 6G (R6G) as probing molecules, SERS spectra were investigated. The results indicates that these SERS active substrates displayed very strong SERS performances (Raman enhancement factor >1×10⁷). Comparing with the ordinary Au film, the SERS enhancement effect of the Au nanocap array is about seven times stronger at 1 363 cm⁻¹. A 6-month-old sample almost kept the same SERS activity with the newly prepared sample. Such ordered Au nanocap arrays allows application in the detection of chemical and biological molecules with trace amounts.

Key words: enhancement factor, ordered Au nanocap array, surface-enhanced Raman scattering (SERS), anodic aluminum oxide (AAO) template, stability

中图分类号:

TU 411

周懿, 付群, 王沙沙, 张鸿超, 雷波, 雷勇, 吴明红. 有序金纳米阵列的可控制备及其表面增强拉曼光谱[J]. 上海大学学报(自然科学版), 2013, 13(5): 479-484.

ZHOU Yi, FU Qun, WANG Sha-sha, ZHANG Hong-chao, LEI Bo, LEI Yong, WU Ming-hong. Controlled Fabrication of Highly Ordered Au Nanoarrays as SERS Active Substrates[J]. Journal of Shanghai University（Natural Science Edition）, 2013, 13(5): 479-484.

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有序金纳米阵列的可控制备及其表面增强拉曼光谱

Controlled Fabrication of Highly Ordered Au Nanoarrays as SERS Active Substrates

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