关键字：magnetic nanoparticle; gamma-Fe(2)O(3); ZnS; in vitro cytotoxicity
摘要：The magnetic-fluorescent gamma-Fe(2)O(3)/ZnS multifunctional nanoparticles were currently prepared with in situ process and their properties and applications were investigated and discussed. Nanosized magnetic Fe(3)O(4) particles with average size of about 5-10 nm were firstly prepared by coprecipitation method and oxidized to gamma-Fe(2)O(3), which were surface modified with sodium citrate. Zn and S sources were then added to obtain gamma-Fe(2)O(3)/ZnS composite nanoparticles. The average size of the composite nanoparticles was about 100-200 nm. The obtained magnetic fluorescent gamma-Fe(2)O(3)/ZnS composite nanoparticles were characterized by TEM, SEM, magnetometer and fluorescence spectrum (FL), respectively, and in vitro cytotoxicity towards human cervical carcinoma Hela cells were determined by MTT assay.
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