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自组装的金属合体单层:SERS基质的方法

R G Freeman, K C Grabar, K J Allison

Science (New York, N.Y.)

|March 17, 1995

概括

研究人员使用自组装的黄金和银纳米粒子创建了高度活跃的表面增强拉曼散射 (SERS) 表面. 这些可重复的SERS基板很容易构建,并显示出广泛应用的前景.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
频谱学是一种光谱学.

背景情况:

表面增强拉曼散射 (SERS) 需要纳米结构的金属表面来放大弱的拉曼信号.
控制金属纳米颗粒的组装对于创建可复制和高度活跃的SERS基板至关重要.
聚合物涂层基板为纳米粒子功能化和受控组装提供了多功能平台.

研究的目的:

开发一种方法,通过金和银纳米颗粒的自组装来创建高度活跃的SERS表面.
研究合性金属颗粒与功能化聚合物基板之间的结合机制.
为了证明SERS应用程序的自组装过程的可重复性和可扩展性.

主要方法:

单分散黄金和银合物颗粒的自组装在聚合物涂层基板上.
聚合物涂层的功能化与化学组 (例如,化物,胺,硫醇) 结合纳米粒子.
使用紫外线可见光谱和SERS实时监测表面演变.
在导电基板上的合体单层的电化学表征.

主要成果:

通过将金和银纳米粒子自组装成单层,制造出宏观的,高度SERS活性的表面.
纳米粒子通过与聚合物功能组 (CN,NH2,SH) 的多重键有效地与基质结合.
自组装过程在纳米和厘米尺度上都表现出高的可重复性.
在导电基板上的合体单层表现出电化学定位性,作为微电极阵列.

结论:

自组装的纳米粒子单层为高度活跃和可重复的SERS基板提供了一个简单的途径.
纳米粒子和功能化聚合物之间的结合相互作用是稳定的单层形成的关键.
这些基质的电化学定位性为传感和电催化开辟了新的途径.
基于金属合体的基板有望在各种科学和技术领域广泛采用.

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