Le Ru E C, Etchegoin P G
The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand.
J Chem Phys. 2009 May 14;130(18):181101. doi: 10.1063/1.3138784.
We propose a general phenomenological description of the enhancement factor distribution for surface-enhanced Raman scattering (SERS) and other related phenomena exploiting large local field enhancements at hot spots. This description extends naturally the particular case of a single (fixed) hot spot, and it is expected to be "universal" for many classes of common SERS substrates containing a collection of electromagnetic hot spots with varying geometrical parameters. We further justify it from calculations with generalized Mie theory. The description studied here provides a useful starting point for a qualitative (and semiquantitative) understanding of experimental data and, in particular, the analysis of the statistics of single-molecule SERS events.
我们提出了一种针对表面增强拉曼散射（SERS）以及利用热点处大局部场增强的其他相关现象的增强因子分布的通用唯象描述。这种描述自然地扩展了单个（固定）热点的特殊情况，并且对于许多包含具有不同几何参数的电磁热点集合的常见SERS基底类别而言，有望是“通用的”。我们通过广义米氏理论的计算进一步证明了这一点。这里所研究的描述为定性（和半定量）理解实验数据，特别是对单分子SERS事件的统计分析，提供了一个有用的起点。
