CdSe和CdTe量子点荧光共振能量转移的荧光场三维数值分析  

Three-Dimensional Numerical Simulation of Fluorescent in CdSe and CdTe Quantum Dot Fluorescence Resonance Energy Transfer

作　　者：李文翰[1] 赵丽辉[2] 韩德明[2] 李超[1] 张喜和[1] 

机构地区：[1]长春理工大学理学院,长春130022 [2]长春理工大学生命科学技术学院,长春30022

出　　处：《光散射学报》2013年第3期281-290,共10页The Journal of Light Scattering

基　　金：国家自然科学基金面上项目(41174108)

摘　　要：量子点虽然广泛应用于生物荧光标记,但仍停留在实验阶段,目前还不能通过实验的办法得到量子点的荧光分布特征。利用有限元的方法对量子点的荧光场分布特征进行了数值模拟计算,选取几种不同材料球形量子点进行电磁散射分析,论述了量子点的荧光场分布规律。通过对单个量子点进行荧光场分析,确定了CdSe量子点、CdTe量子点荧光共振能量转移模型,计算结果表明:量子点的荧光场的分布规律可以由量子点的电磁散射场给出,对量子点散射场的分析有助于我们更细致地了解量子点荧光共振能量转移的过程,对于探知一般实验无法得到的量子点荧光场分布规律是可行的。该结果对控制量子点的荧光分布,提高量子点荧光效率具有重要的实际意义。Although quantum dots have been widely used in biological fluorescent labeling,it still stays in the experimental stage,At present,the distribution characteristics of quantum dot fluorescence still cannot be obtained from experiments.The finite element method is adopted to carry out the three-dimensional numerical simulation of the distribution characteristics of quantum dot fluorescence,several spherical quantum dots of different materials are selected for electromagnetic scattering analysis,after that the distribution regularity of the quantum dot fluorescence is discussed.The fluorescence resonance energy transfer model of CdSe quantum dot-CdTe quantum dot is determined from single quantum dot fluorescence field analysis.The result indicatesthat the distribution of quantum dot fluorescence field can be given by the electromagnetic scattering field.it is feasible to get the distribution regularity of the quantum dot fluorescence,which is impossible for experiments,from finite element analysis of the quantum dot fluorescence field by means of the electromagnetic scattering theory.The calculation results also carry great practical importance for both the control of the fluorescence distribution of the quantum dots and the improvement of the efficiency of quantum dot fluorescence.

关 键 词：量子点 荧光共振能量转移 有限元 生物分子 

分 类 号：O433.4[机械工程—光学工程] O632[理学—光学]