Nishikawa Hiroyuki, Morita Tomoyuki, Sugiyama Junji, Kimura Shunsaku
Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
J Colloid Interface Sci. 2004 Dec 15;280(2):506-10. doi: 10.1016/j.jcis.2004.08.013.
A novel microreactor was prepared by self-assembly of an amphiphilic block copolymer composed of a hydrophobic helical peptide unit with a naphthyl group at the C terminal and a hydrophilic poly(ethylene glycol) unit. The copolymer formed a self-assembly in water, taking a vesicular structure. Noticeably, when the copolymer was dispersed in an Au(3+) aqueous solution, gold nanoparticles were formed without addition of any reducing reagent. The naphthyl groups, which are located at the inner surface of the vesicular assembly, promoted the reduction of Au(3+) ions with accompanying pH decrease.
通过自组装由C端带有萘基的疏水性螺旋肽单元和亲水性聚乙二醇单元组成的两亲性嵌段共聚物制备了一种新型微反应器。该共聚物在水中形成自组装体，呈囊泡结构。值得注意的是，当该共聚物分散在Au(3+)水溶液中时，无需添加任何还原剂即可形成金纳米颗粒。位于囊泡组装体内表面的萘基促进了Au(3+)离子的还原，同时伴随pH值降低。
