Exploring Rolled-up Au–Ag Bimetallic Microtubes for Surface-Enhanced Raman Scattering Sensor
Exploring Rolled-up Au–Ag Bimetallic Microtubes for Surface-Enhanced Raman Scattering Sensor
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DOI：
10.1021/jp308854t
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发表时间：
2012-11
影响因子：
3.7
通讯作者：
Yin Yin-Yin;T. Qiu;Libo Ma;Xianzhong Lang;Yan Zhang;Gaoshan Huang;Y. Mei;O. Schmidt
中科院分区：
文献类型：
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作者：
Yin Yin-Yin;T. Qiu;Libo Ma;Xianzhong Lang;Yan Zhang;Gaoshan Huang;Y. Mei;O. Schmidt
介绍了一种用于研究曲率相关的局域表面等离子体波的Au-Ag双金属微管的设计和制备技术。观察到了高度的表面增强拉曼散射(SERS)，它说明了导致电磁场增强的局域表面等离子激元的分布。采用了一种时域有限差分方法对金属表面的电磁场特性进行了数值模拟。这种贵重双金属微管增强的SERS性能可能会激发人们对集成高灵敏生物传感器进行快速、无损和定量生物分析的进一步兴趣，特别是在微流体分析中。
A technique to design and fabricate Au–Ag bimetal microtubes for the investigation of curvature-dependent localized surface plasmon modes is demonstrated. Highly surface-enhanced Raman scattering (SERS) is observed that illustrates the distribution of localized surface plasmon modes leading to an enhanced electromagnetic field. A finite-difference time-domain method is also employed to simulate the electromagnetic field properties on the metal surface. The enhanced SERS performance of such noble bimetal microtubes could spur further interest in the integration of highly sensitive biosensors for rapid, nondestructive, and quantitative bioanalysis, particularly in microfluidics.