title: Preparation and characterization of metal-chitosan nanocomposites.
abstract: Various metal-chitosan nanocomposites were synthesized, including silver (Ag), gold (Au), platinum (Pt), and palladium (Pd) in aqueous solutions. Metal nanoparticles were formed by reduction of corresponding metal salts with NaBH4 in the presence of chitosan. And chitosan molecules adsorbing onto the surface of as-prepared metal nanoparticles formed the corresponding metal-chitosan nanocomposites. Transmission electron microscopy (TEM) images and UV-vis spectra of the nanocomposites revealed the presence of metal nanoparticles. Comparison of all the resulting particles size, it shows that silver nanoparticles are much larger than others (Au, Pt and Pd). In addition, the difference in particles size leads to develop different morphologies in the films cast from prepared metal-chitosan nanocomposites. Polarized optical microscopy (POM) images show a batonet-like structure for Ag-chitosan nanocomposites film, while for the films cast from other metal (Au, Pt, and Pd)-chitosan nanocomposites, some branched-like structures with a few differences among them were observed under POM observation.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, PR China.
authors.forename: Haizhen
authors.initials: H
authors.lastname: Huang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Yuan
authors.forename: Xiurong
authors.initials: X
authors.lastname: Yang
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D002686:Chitin / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry*; D003432:Cross-Linking Reagents / Q000494:pharmacology; D006046:Gold; D008670:Metals / Q000737:chemistry*; D008853:Microscopy; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology; D010165:Palladium; D010984:Platinum; D012834:Silver / Q000737:chemistry; D013053:Spectrophotometry; D013696:Temperature; D014466:Ultraviolet Rays
chemical_list: D001672:Biocompatible Materials; D003432:Cross-Linking Reagents; D008670:Metals; D002686:Chitin; D012834:Silver; D010984:Platinum; D010165:Palladium; D006046:Gold; D048271:Chitosan