Ag-polymer composite microspheres with patterned surface structures

摘要

Novel silver-poly(acrylamide-co-methacrylic acid) [Ag-P(AM-co-MAA)] composite microspheres,in tens of micrometer size range,with patterned surface and core/ shell structures were prepared by chemical reduction of Ag2_CrO4-P(AM-co-MAA) composite microspheres in eth-anol.Characterization with various techniques revealed that the chemical composition of the "shell" is dominated by Ag,but the "core" is dominated by the template,P(AM-co-MAA).It was also demonstrated that the surface morphology of the Ag-polymer composite microspheres is similar to that of their precursors and can be controlled to a certain extent by varying the composition of template copolymer,approaches,and amount of Ag2CrO4 deposited.This morphology transfer technique is also applicable for other silver salts-polymer composite microspheres.The same silver-polymer composite microspheres with very different morphology have also been prepared by utilizing this technique,but the different precursor microspheres,Ag3PO4-P(AM-co-MAA),were used.