A simple way of preparing large compound vesicles loaded with and without silver nanoparticles based on polystyrene-block-polyacrylonitrile
writer：Lin Tang& Xiaoyan Ma& Ying Song& Jie Yu
keywords：Large compound vesicles.Hybrid large compound vesicles. Ag nanoparticles. Polystyreneblock-polyacrylonitrile
source：期刊
specific source：Colloid and Polymer Science, 2012, DOI:10.1007/s00396-012-2806-8
Issue time：2012年
By a simple method, large compound vesicles
(LCVs) and LCVs with silver nanoparticles (Ag@LCVs) are created from asymmetric
polystyrene-block-polyacrylonitrile (PS-b-PAN) and silver precursor. The
asymmetric PSb-PAN is polymerized by sequential reverse atom transfer radical
polymerization and atom transfer radical polymerization. Afterwards, by using
N,N′-dimethylformamide
as solvent and reductant for the silver precursor, LCVs and Ag@LCVs are
produced through simple drop casting and evaporation of solution on the
substrate. Transmission electron microscope images together with scanning
electron microscopy images show that both LCVs and Ag@LCVs are flowerlike and
of rough surfaces. Ultraviolet-visible spectrophotometer confirms the formation
of Ag nanoparticles (Ag NPs). Specifically, the distribution of Ag NPs in Ag@LCVs
is not uniform and they are principally in the center. Otherwise, adherence of
simple vesicles and small hybrid nanoparticles of Ag NPs encapsulated within
PS-bPAN are observed. Finally, formation mechanisms for LCVs and Ag@LCVs are
discussed.