writer：Tuanwei Liu, Bin Liu, Xiaomeng Fu, Shuxuan Sun, Wei Liu, Guomin Bian, Yonglin Qi, and Xinlin Yang*
keywords：Magnetic nanoparticles; Fluorescent nanoparticles; Surface-initiated ATRP; pH-responsive nanoparticles.
source：期刊
specific source：Colloid Polymer Science, 293 (3), 809-816 (2015). DOI: 10.1007/s00396-014-3469-4
Issue time：2015年
Multifuctional magnetite@silica-fluorescein isothioxylate-g-poly(dimethyl amino ethyl methacrylate) (Fe₃O₄@SiO₂-FITC-g-PDMAEMA) tri-layer microspheres with magnetism, fluorescence, and pH-responsive PDMAEMA shell were designed and prepared. The functional PDMAEMA brush was grafted from Fe₃O₄@SiO₂-FITC nanoparticles by the surface-induced atom transfer radical polymerization (SI-ATRP) onto the alkylbromide-modified Fe₃O₄@SiO₂-FITC fluorescent templates, which were synthesized by the co-precipitation of Fe(II) and Fe(III) under basic condition together with the subsequently modified St?ber sol-gel technique. These nanoparticles were characterized by transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), fluorescence spectrum, dynamic light scattering (DLS) and Zeta-potential.