A class of core-shell-type fluorescent nanospheres with a particle diameter less than 40 nm,which emit orange,yellow,green and cyan light,respectively,were prepared.In fabricating strategy,the water-insoluble,photo-th...A class of core-shell-type fluorescent nanospheres with a particle diameter less than 40 nm,which emit orange,yellow,green and cyan light,respectively,were prepared.In fabricating strategy,the water-insoluble,photo-thermostable fluorescent dye molecules are molecularly dispersed and embedded in the nanoscale crosslinked polymeric matrix via a modified miniemulsion polymerization process,and then the biocompatible shells are achieved by a seeded polymerization technique.These obtained nanospheres are uniform in size,highly photostable,of high chemical resistance and high fluorescence quantum-yield.展开更多
Polyaniline(PAn)doped with multiple sulfonic acid system of dodecylbenzenesulfonic acid(DBSA)and sulfosalicylic acid(SSA)was synthesized by emulsion polymerization using ammonium persulfate(APS)as an oxidizing agent i...Polyaniline(PAn)doped with multiple sulfonic acid system of dodecylbenzenesulfonic acid(DBSA)and sulfosalicylic acid(SSA)was synthesized by emulsion polymerization using ammonium persulfate(APS)as an oxidizing agent in the presence and the absence of a constant magnetic field(MF)of 0.8 T.The structure and properties of the PAn were characterized by X-ray diffractometer(XRD),thermogravimetric apparatus(TGA),FT-IR spectroscope(FT-IR)and four probe digital multimeter.The results indicate that,when the molar ratio of DBSA to SSA is 1/3,that of dopant to An is 3/2,that of APS to An is 4/5 in the synthesizing media,and the doping time is 3 h,the conductivity of the PAn synthesized in the presence of the MF of 0.8 T reaches 5.88 S/cm,which is higher than that of the PAn synthesized in the absence of the MF.The thermal stability,the crystallinity and the doping degree of the PAn synthesized in the presence of the MF are also improved.MF not only enhances the conductivity,but also reduces the doping time,the dosage of the dopant and the oxidizing agent when the conductivity reaches the maximum.展开更多
文摘A class of core-shell-type fluorescent nanospheres with a particle diameter less than 40 nm,which emit orange,yellow,green and cyan light,respectively,were prepared.In fabricating strategy,the water-insoluble,photo-thermostable fluorescent dye molecules are molecularly dispersed and embedded in the nanoscale crosslinked polymeric matrix via a modified miniemulsion polymerization process,and then the biocompatible shells are achieved by a seeded polymerization technique.These obtained nanospheres are uniform in size,highly photostable,of high chemical resistance and high fluorescence quantum-yield.
基金Project(20176066)supported by the National Natural Science Foundation of China
文摘Polyaniline(PAn)doped with multiple sulfonic acid system of dodecylbenzenesulfonic acid(DBSA)and sulfosalicylic acid(SSA)was synthesized by emulsion polymerization using ammonium persulfate(APS)as an oxidizing agent in the presence and the absence of a constant magnetic field(MF)of 0.8 T.The structure and properties of the PAn were characterized by X-ray diffractometer(XRD),thermogravimetric apparatus(TGA),FT-IR spectroscope(FT-IR)and four probe digital multimeter.The results indicate that,when the molar ratio of DBSA to SSA is 1/3,that of dopant to An is 3/2,that of APS to An is 4/5 in the synthesizing media,and the doping time is 3 h,the conductivity of the PAn synthesized in the presence of the MF of 0.8 T reaches 5.88 S/cm,which is higher than that of the PAn synthesized in the absence of the MF.The thermal stability,the crystallinity and the doping degree of the PAn synthesized in the presence of the MF are also improved.MF not only enhances the conductivity,but also reduces the doping time,the dosage of the dopant and the oxidizing agent when the conductivity reaches the maximum.
