CoFe2O4纳米粒子的共振散射光谱研究

液相纳米粒子CoFe2O4在400，470，510，800和940nm产生五个共振散射峰。它是一种非线性光散射介质。当激发波长为330nm时，CoFe2O4纳米粒子分别在于330，660和990nm产生一个共振散射峰、一个1/2频散射峰和一个1/3分频散射峰；当激发波长为800nm时，在800nm产生一个共振散射峰，而在400nm产生一个较该共振散射峰更强的2倍频散射峰。分频散射和倍频散射与共振散射有相似的散射行为。根据建立的灰白粒子体系共振散射光谱原理定性解析了CoFe2O4纳米粒子体系的共振散射光谱。

Studies on the Resonance Nonlinear Scattering of Aqueous CoFe2O4 Nanoparticle

There are five resonance scattering peaks at 400,470,510,800 and 940 nm for aqueous CoFe 2O 4 nanoparticles It is a nonlinear scattering medium When excited wavelength is at 330 nm, there are a Rayleigh scattering peak at 330 nm ,a 1/2 fraction frequency peak at 660 nm and a 1/3 fraction frequency peak at 990 nm It exhibits a strongest double frequency peak at 400 nm and a Rayleigh scattering peak at 800 nm as the excited wavelength is at 800 nm The double frequency peak and the 1/2 fraction frequency peak have similar scattering property as the Rayleigh scattering peak A new concept including gray particle and white particle has been proposed, and applied to analysis of the resonance scattering spectra of CoFe 2O 4 nanoparticle system