title: Degradation behavior of chitosan chains in the 'green' synthesis of gold nanoparticles.
abstract: The degradation behavior of chitosan chains in the synthesis of Au nanoparticles by a 'green' method was investigated in this paper for the first time. UV-vis absorption spectra suggested the formation of Au nanoparticles and TEM images showed that their sizes were between 10 and 50nm. During the process of synthesis, the intrinsic viscosity [eta] of chitosan was observed to decrease gradually, implying that the chitosan chains degraded under the reaction conditions. Further studies showed that the degree of degradation of the chitosan chains was changed with different reaction temperatures, reactant ratios, and the molecular weights of chitosan.
authors.affiliation: School of Chemistry and Materials Science, Ludong University, Yantai 264025, People's Republic of China.
authors.forename: Changmei
authors.initials: C
authors.lastname: Sun
authors.forename: Rongjun
authors.initials: R
authors.lastname: Qu
authors.forename: Hou
authors.initials: H
authors.lastname: Chen
authors.forename: Chunnuan
authors.initials: C
authors.lastname: Ji
authors.forename: Chunhua
authors.initials: C
authors.lastname: Wang
authors.forename: Yanzhi
authors.initials: Y
authors.lastname: Sun
authors.forename: Benhong
authors.initials: B
authors.lastname: Wang
mesh_terms: D002236:Carbohydrate Conformation; D048271:Chitosan / Q000737:chemistry*; D004337:Drug Carriers / Q000737:chemistry; D005947:Glucose / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D008956:Models, Chemical; D008970:Molecular Weight; D036103:Nanotechnology / Q000379:methods; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors; D014783:Viscosity
chemical_list: D004337:Drug Carriers; D006046:Gold; D048271:Chitosan; D005947:Glucose