UV-induced synthesis, characterization and formation mechanism of silver   nanoparticles in alkalic carboxymethylated chitosan solution

doi:10.1007/s11051-007-9353-0

CORC > 北京大学 > 化学与分子工程学院

	UV-induced synthesis, characterization and formation mechanism of silver nanoparticles in alkalic carboxymethylated chitosan solution
	Huang, Ling ; Zhai, Maolin L. ; Long, Dewu W. ; Peng, Jing ; Xu, Ling ; Wu, Guozhong Z. ; Li, Jiuqiang Q. ; Wei, Genshuan S.
刊名	journal of nanoparticle research
	2008
关键词	silver nanoparticle AgNPs/CMCTS composite UV light irradiation laser photolysis surface plasmon band colloids AQUEOUS-SOLUTION LASER PHOTOLYSIS METAL NANOPARTICLES OPTICAL-ABSORPTION CHITIN DERIVATIVES STABILIZED GOLD NANOCOMPOSITES GROWTH IRRADIATION ELECTRON
DOI	10.1007/s11051-007-9353-0
英文摘要	The silver nanoparticles (AgNPs) were synthesized in an alkalic aqueous solution of silver nitrate (AgNO(3))/carboxymethylated chitosan (CMCTS) with ultraviolet (UV) light irradiation. CMCTS, a water-soluble and biocompatible chitosan derivative, served simultaneously as a reducing agent for silver cation and a stabilizing agent for AgNPs in this method. UV-vis spectra and transmission electron microscopy (TEM) images analyses showed that the pH of AgNO(3)/CMCTS aqueous solutions, the concentrations of AgNO(3) and CMCTS can affect on the size, amount of synthesized AgNPs. Further by polarized optical microscopy it was found that the CMCTS with a high molecular weight leads to a branch-like AgNPs/CMCTS composite morphology. The diameter range of the AgNPs was 2-8 nm and they can be dispersed stably in the alkalic CMCTS solution for more than 6 months. XRD pattern indicated that the AgNPs has cubic crystal structure. The spectra of laser photolysis of AgNO(3)/CMCTS aqueous solutions identified the early reduction processes of silver cations ( Ag(+)) by hydrated electron (e(aq)(-)) formed by photoionization of CMCTS. The rate constant of corresponding reduction reaction was 5.0 x 10(9) M(-1) s(-1).; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; SCI(E); EI; 16; ARTICLE; 7; 1193-1202; 10
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/151467]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Huang, Ling,Zhai, Maolin L.,Long, Dewu W.,et al. UV-induced synthesis, characterization and formation mechanism of silver nanoparticles in alkalic carboxymethylated chitosan solution[J]. journal of nanoparticle research,2008.
APA	Huang, Ling.,Zhai, Maolin L..,Long, Dewu W..,Peng, Jing.,Xu, Ling.,...&Wei, Genshuan S..(2008).UV-induced synthesis, characterization and formation mechanism of silver nanoparticles in alkalic carboxymethylated chitosan solution.journal of nanoparticle research.
MLA	Huang, Ling,et al."UV-induced synthesis, characterization and formation mechanism of silver nanoparticles in alkalic carboxymethylated chitosan solution".journal of nanoparticle research (2008).