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
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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). |
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