Swathi R S, Sebastian K L
Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
J Chem Phys. 2007 Jun 21;126(23):234701. doi: 10.1063/1.2735584.
The authors study the distance dependence of the rate of electronic excitation energy transfer from a dye molecule to a metal nanoparticle. Using the spherical jellium model, they evaluate the rates corresponding to the excitation of l=1, 2, and 3 modes of the nanoparticle. The calculation takes into account both the electron-hole pair and the plasmon excitations of the nanoparticle. The rate follows conventional R(-6) dependence at large distances while small deviations from this behavior are observed at shorter distances. Within the framework of the jellium model, it is not possible to attribute the experimentally observed d(-4) dependence of the rate to energy transfer to plasmons or electron-hole pair excitations.
作者研究了从染料分子到金属纳米颗粒的电子激发能量转移速率的距离依赖性。他们使用球形电子气模型，评估了与纳米颗粒的l = 1、2和3模式激发相对应的速率。该计算同时考虑了纳米颗粒的电子-空穴对和等离子体激元激发。在远距离时，速率遵循传统的R(-6)依赖性，而在较短距离时观察到与这种行为的小偏差。在电子气模型的框架内，不可能将实验观察到的速率的d(-4)依赖性归因于向等离子体激元或电子-空穴对激发的能量转移。
