This paper describes the formation of magnetic and fluorescent nanocomposite particles which consist of superparamagnetic Fe_3O_4 core,SiO_2 shell and organic dye(FITC) coating layer on their surface.The obtained nanocomposites possess typical superparamagnetism and exhibit clear green fluorescence image.And their fluorescence emission is pH-dependent,which would be applied to pH sensing.
Yu ZhangShang Wen Yan GongLu JinShuang Man LiZhong Ping ChenMing MaNing Gu
