Preparation of Stable Silver Nanoparticles Having Wide Red-To-Near-Infrared Extinction.

ABSTRACT: The synthesis of silver nanoparticles (AgNPs) within the interlayer space of transparent layered titania nanosheet (TNS) films is investigated. A considerable number of silver ions (≈70% against the cation exchange capacity of the TNS) are intercalated in the TNS films using methyl-viologen-containing TNSs as a precursor. The silver ion (Ag⁺)-containing TNS films are treated with aqueous sodium tetrahydroborate (NaBH₄), resulting in a gradual color change to bright blue. Various structural analyses clearly show that crystalline AgNPs are generated within the interlayer space of the TNSs. The NaBH₄-treated films show intense and characteristic near-infrared (NIR) extinction spectra up to 1800 nm. The stability of the AgNPs within the TNS against oxygen and m

SUBMITTER: Kawamura S 

PROVIDER: S-EPMC6607257 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature