Dynamic Surface Enhanced Raman Spectroscopy (SERS): Extracting SERS from Normal Raman Scattering
Dynamic Surface Enhanced Raman Spectroscopy (SERS): Extracting SERS from Normal Raman Scattering
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DOI：
10.1021/ac301914a
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发表时间：
2012-10-16
影响因子：
7.4
通讯作者：
Carron, K. T.
中科院分区：
文献类型：
--
作者：
Scott, B. L.;Carron, K. T.
我们已经证明了动态表面增强拉曼光谱（DSRS）测量的两个显着的好处：去除仪器和正常的拉曼干扰的表面增强拉曼光谱（Sers）光谱和表面增强拉曼光谱活性颗粒上的吸附物种群的位点选择性光谱。我们的第一个例子壳纳米粒子在非常低的浓度证实了DSRS的好处，消除了压倒性的强溶剂光谱干扰。第二个好处，位点选择，被证明与裸露的Au纳米粒子上的4-巯基吡啶，观察一个小群体的分子，从粒子上的大群体的分子光谱独特的。DSRS光谱起源于纳米粒子系综上的一小部分吸附物之间的过量方差。
We have demonstrated two significant benefits of dynamic surface enhanced rarnan spectroscopy (DSERS) measurements: removal of instrumental and normal Raman interferences in surface enhanced roman spectroscopy (SERS) spectroscopy and site-selective spectroscopy of adsorbate populations on SERS-active particles. Our first example of shelled nanoparticles at very low concentrations confirmed the benefit of DSERS for removal of an overwhelmingly strong solvent spectral interference. The second benefit, site selection, was demonstrated with 4-mercaptopyridine on bare Au nanoparticles to observe a small population of molecules that were spectroscopically unique from the large population of molecules on the particles. The DSERS spectrum originated from excess variance between a small population of adsorbates on the ensemble of nanoparticles.