Controllable embedding of silver nanoparticles on silica nanospheres using poly(acrylic acid) as a soft template

摘要

Silver nanoparticles embedded on silica nanospheres were prepared by using ion-exchangeable poly( acrylic acid) ( PAAc) grafted on the silica surface as a soft template followed by chemical reduction. The prepared hybrid nanospheres were characterized using x-ray photoelectron spectroscopy ( XPS), x-ray diffraction ( XRD), transmission electron microscopy ( TEM), ultraviolet-visible ( UV-vis) absorption spectroscopy, and bactericidal activity measurements. The results suggest that mono-dispersed Ag nanoparticles with controllable diameters can be obtained on the surface of silica nanospheres by varying the concentration of the silver nitrate and the pH value of the suspension, and the hybrid nanospheres have excellent bactericidal activity and potential applications as bactericidal agents in biomedical fields.