Abstract
A new type of smart composite microgels, which are able to control the catalytic activity of their loaded silver nanoparticles by light, was designed and fabricated based on the idea of function transfer between their constituent components. First, the surfaces of monodisperse gold nanorods (AuNRs) with strong photothermal effect were coated with poly(N-isopropylacrylamide) (PNIPAM) hydrogel by seed precipitation polymerization to prepare the two-component composite microgels with core–shell structure (AuNR@PNIPAM microgels). Then, Ag+ ions coordinated into the shell of AuNR@PNIPAM microgels were in situ reduced by sodium borohydride to produce silver nanoparticles (AgNPs) loaded three-component composite microgels (AuNR@(AgNPs/PNIPAM) microgels). The characterization results obtained by transmission electron microscopy show that the gold nanorod is located at the center of the three-component composite microgels and AgNPs with the average particle diameters of 6–10 nm are evenly distributed within its sh...
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