【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。更多还原

【Abstract】 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.更多还原