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Low molecular weight chitosan was purchased from Sigma Aldrich, Glycerol (about 98% purified), hydrochloric acid and sodium hydroxide pellets (purified) were purchased from Merck. Acetic acid glacial was purchased from Qualigens Fine Chemicals. All other materials used were of analytical reagent grade from commercial sources. Experimental Procedure The Chitosan/Ag or Au nanocomposites were prepared using the same procedure as used for the preparation of chitosan hydrogels. The nanocompositesdoi:10.1039/c2ra21705h fatcat:ihedpctuwza2vpz7aua7scjzl4