Document Detail

Synthesis of metallic nanoparticles protected with N,N,N-trimethyl chitosan chloride via a relatively weak affinity.
MedLine Citation:
PMID:  21727553     Owner:  NLM     Status:  In-Data-Review    
A water-soluble cationic chitosan derivative, N,N,N-trimethyl chitosan chloride (TMC), was synthesized and used as a stabilizing reagent for the synthesis of highly stable Au, Ag and Pt nanoparticles in a single-phase of neutral aqueous solution. The morphology and stability of metallic nanoparticles were evaluated by transmission electron microscopy and UV-vis spectroscopy. The results showed that well-dispersed metallic nanoparticles have a spherical morphology with diameters of about 3 ± 0.5 nm. The prepared gold nanoparticles are stable in the aqueous solution (no significant changes in their morphology and size within 10 months) due to repulsion between the charged polymer shell coatings around the metallic nanoparticles. The relatively low affinity of TMC on gold nanoparticles was confirmed by using a ligand exchange experiment. The mechanism stabilizing the chitosan derivative and the neighbouring gold nanoparticles was identified by FTIR, (1)H NMR and (13)C NMR measurements.
Ya Ding; Xing-Hua Xia; Can Zhang
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Publication Detail:
Type:  Journal Article     Date:  2006-07-28
Journal Detail:
Title:  Nanotechnology     Volume:  17     ISSN:  0957-4484     ISO Abbreviation:  Nanotechnology     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2011-07-05     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101241272     Medline TA:  Nanotechnology     Country:  England    
Other Details:
Languages:  eng     Pagination:  4156-62     Citation Subset:  -    
Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China.
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