摘要
利用离散偶极近似(Discrete Dipole Approximation,DDA)算法仿真分析了纯金,纯银以及金银核壳结构的纳米颗粒的LSPR(Localized Surface Plasmon Resonance)消光光谱以及其波峰随外部介质折射率的变化情况,与实验相符。发现光谱波峰位置的变化与折射率成线性关系,而且金银核-壳结构的折射率灵敏度大于银纳米颗粒的灵敏度;而银纳米颗粒的灵敏度大于金纳米颗粒的灵敏度。
The DDA（Discrete Dipole Approximation）method is used to simulate the LSPR（Localized Surface Plasmon Resonance）phenomenon of the pure gold,silver,and core-shell structure.The result is consistent with the known experimental results.There is a linear relationship between the spectrum peak and the surrounding refractive index.The refractive index sensitivity of core-shell structure nanoparticle is greater than that of pure silver structure,and the sensitivity of the pure silver is greater than that of pure gold structure.
出处
《传感技术学报》
CAS
CSCD
北大核心
2010年第5期630-634,共5页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金资助(60574091
60871028)
天津市科技攻关项目资助(06YFGPGX08700)
天津市自然科学基金资助(08JCYBJC12500)
天津市科技支撑计划资助(09ZCKFGX01200)
