Simple Method for Preparing Controllably Aggregated Silver Particle Films Used as Surface-Enhanced Raman Scattering Active Substrates
Simple Method for Preparing Controllably Aggregated Silver Particle Films Used as Surface-Enhanced Raman Scattering Active Substrates
复制标题
制备用作表面增强拉曼散射活性基底的可控聚集银粒子薄膜的简单方法
DOI：
10.1021/la020151a
复制
发表时间：
2002-08
期刊：
影响因子：
3.9
通讯作者：
Ozaki Yukihiro
中科院分区：
文献类型：
--
作者：
Hu Jiawen;Zhao Bing;Xu Weiqing;Fan Yuguo;Li Bofu;Ozaki Yukihiro
银胶体是广泛使用的表面增强拉曼散射（SERS）活性基质之一。为了获得 SERS 效果，它们在添加分析物时聚集是必要的。然而，信号幅度的不稳定和不可再现性问题是由聚集体的形成引起的。考虑到银胶体的聚集对于诱导小银簇至关重要，在本研究中，我们开发了一种干燥工艺来制备直接支撑在载玻片上的银颗粒膜（银簇）。这些银颗粒膜是通过固体基质上支撑的薄水膜中银胶体的聚集而产生的。随着水的蒸发，银簇留在固体基质上。因此，该组装体完全满足银胶体聚集的要求，同时具有固体SERS活性基底的稳定性。我们可以轻松地从这些银中获得出色的 SERS 光谱......
Silver colloids are one of the extensively employed surface-enhanced Raman scattering (SERS) active substrates. To obtain the SERS effect, their aggregation upon addition of analyte is necessary. However, problems of instability and irreproducibility in the magnitude of the signal are caused by the formation of aggregates. Considering that the aggregation of silver colloids is essential to induce small silver clusters, in the present study, we develop a drying process to prepare silver particle films (silver clusters) that are supported directly on a glass slide. These silver particle films arise through the aggregation of silver colloids occurring in thin water films supported on a solid substrate. With the evaporation of water, silver clusters are left on the solid substrate. Thus, the assembly meets perfectly the requirement of aggregation of silver colloids and, at the same time, possesses the stability of solidlike SERS-active substrates. We can easily obtain excellent SERS spectra from these silver ...