Department of Chemistry, Rice University, Houston, Texas 77005, USA.
J Phys Chem A. 2009 Nov 26;113(47):13173-83. doi: 10.1021/jp9037232.
Surface-enhanced Raman optical activity (SEROA) is investigated theoretically for molecules near a metal nanoshell. For this purpose, induced molecular electric dipole, magnetic dipole, and electric quadrupole moments must all be included. The incident field and the induced multipole fields all scatter from the nanoshell, and the scattered waves can be calculated via extended Mie theory. It is straightforward in this framework to calculate the incident frequency dependence of SEROA intensities, i.e., SEROA excitation profiles. The differential Raman scattering is examined in detail for a simple chiroptical model that provides analytical forms for the relevant dynamical molecular response tensors. This allows a detailed investigation into circumstances that simultaneously provide strong enhancement of differential intensities and remain selective for molecules with chirality.
表面增强拉曼旋光活性（SEROA）在金属纳米壳附近的分子中进行了理论研究。为此，必须包括感应分子电偶极矩、磁偶极矩和电四极矩。入射场和感应多极场都会从纳米壳散射，并且可以通过扩展 Mie 理论来计算散射波。在这个框架中，很容易计算 SEROA 强度的入射频率依赖性，即 SEROA 激发谱。对于一个简单的手性模型，详细研究了差示拉曼散射，该模型为相关动态分子响应张量提供了分析形式。这允许详细研究同时提供差分强度的强烈增强并且对具有手性的分子具有选择性的情况。
