Citation: Bin Liu, Feng-kai Yang, Guang-yu Liu, Xin-lin Yang. SYNTHESIS OF CdS/SiO2/POLYMER TRI-LAYER FLUORESCENT NANOSPHERES WITH FUNCTIONAL POLYMER SHELLS[J]. Chinese Journal of Polymer Science, ;2012, 30(3): 359-369. doi: 10.1007/s10118-012-1134-2 shu

SYNTHESIS OF CdS/SiO2/POLYMER TRI-LAYER FLUORESCENT NANOSPHERES WITH FUNCTIONAL POLYMER SHELLS

Received Date: 5 May 2011
Revised Date: 8 September 2011

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 20874049 and 21174065) and the Natural Science Foundation of Tianjin (No. 11JCYBC02100).

Tri-layer CdS/SiO2/polymer hybrid nanospheres were synthesized by distillation precipitation polymerization of either ethyleneglycol dimethacrylate (EGDMA) or EGDMA together with comonomers having different functional groups, such as methacrylic acid, 4-vinylpyridine and 2-hydroxyethylmethacrylate, in the presence of 3-(methacryloxy)propyl trimethoxysilane (MPS)-modified CdS/SiO2 nanoparticles as seeds in acetonitrile with 2,2?-azobisisobutyronitrile (AIBN) as initiator. In this approach, MPS-modified inorganic seeds were prepared by the modification of CdS/SiO2 nanoparticles via the self-condensation reaction between the hydroxyl groups of sinaols, in which the CdS/SiO2 nanoparticles were afforded by a reverse microemulsion technique for the synthesis of CdS core nanoparticles with the subsequent coating of silica layer. The polymer shell-layers encapsulated over the MPS-modified CdS/SiO2 inorganic seeds via the efficient capture of the monomers and oligomers from the solution with the aid of the vinyl groups incorporated by the MPS modification, in which the polymer shell-thickness and functional groups including carboxyl, pyridyl and hydroxyl, were facilely controlled by the feed of EGDMA as well as the types of comonomers used for the polymerization. These nanospheres were characterized by transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), fluorescence spectroscopy and zeta potential.
- Fluorescent nanosphere
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