Self-formation and -organization of Metal Nanoparticles on Particles

2014 Fiscal Year Final Research Report

• Project/Area Number: 24510176
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Microdevices/Nanodevices
• Research Institution: Shinshu University
• Principal Investigator: SAKAI Toshio 信州大学, 学術研究院工学系, 准教授 (30468706)
• Co-Investigator(Renkei-kenkyūsha): OKADA Tomohiko 信州大学, 学術研究院工学系, 准教授 (30386552)
• Research Collaborator: ALEXANDRIDIS Paschalis The State University of New York, Department of Chemical and Biological Engineering, University at Buffalo, Professor
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 金属ナノ粒子 / シリカ粒子 / 両親媒性高分子 / 自己形成 / 自己集積 / パターニング / 次元制御 / 触媒活性

Outline of Final Research Achievements

In this work, we examined the self-formation and -organization of gold nanoparticles on silica spheres using poly(ethylene oxide)-poly(propylene oxide) (PEO-PPO) block copolymers in solutions. The PEO-PPO block copolymers are expected to form the self-assembly on silica spheres due to the interfacial activity and amphiphilic characters of PEO-PPO block copolymers. In addition, gold nanoparticles would be formed in the self-assembled layers on silica spheres due to the reducing function of PEO-PPO block copolymers for tetrachloride gold(III) ions ([AuCl4]-) [Sakai et al., Langmuir, 2004; J. Colloid Interface Sci., 2012]. Indeed, gold nanoparticles were formed and organized on silica spheres by mixing of an aqueous [AuCl4]- solution with an aqueous PEO-PPO solution containing silica spheres. Furthermore, the formation and organization of gold nanoparticles on the silica sphere were controlled by reaction temperature, polymer type, solvent type and solvent quality.

Free Research Field

コロイド・界面化学