title: [Studies on the resonance nonlinear scattering of aqueous CoFe2O4 nanoparticle].
abstract: There are five resonance scattering peaks at 400, 470, 510, 800 and 940 nm for aqueous CoFe2O4 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 CoFe2O4 nanoparticle system.
authors.affiliation: Institute of Environmental Chemistry, Southwest-China Normal University, Chongqiang 400715, China.
authors.forename: Zhi-liang
authors.initials: ZL
authors.lastname: Jiang
authors.forename: Shao-pu
authors.initials: SP
authors.lastname: Liu
authors.forename: Bao-gang
authors.initials: BG
authors.lastname: Zhao
authors.forename: Sa
authors.initials: S
authors.lastname: Chen
authors.forename: Jian
authors.initials: J
authors.lastname: Li
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D004563:Electrochemistry; D005296:Ferrous Compounds / Q000737:chemistry*; D036103:Nanotechnology; D010316:Particle Size; D012542:Scattering, Radiation; D012834:Silver / Q000737:chemistry*; D018030:Silver Compounds / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
chemical_list: D005296:Ferrous Compounds; D018030:Silver Compounds; D003035:Cobalt; D012834:Silver; C037548:silver chloride