Multipetal-Structured and Dumbbell-Structured Gold鈥揚olymer Composite Particles with Self-Modulated Catalytic Activity

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• 作者：Mingmeng Zhang ; Todd P. Otanicar ; Patrick E. Phelan ; Lenore L. Dai
• 刊名：Langmuir
• 出版年：2015
• 出版时间：December 8, 2015
• 年：2015
• 卷：31
• 期：48
• 页码：13191-13200
• 全文大小：648K
• ISSN：1520-5827

文摘

A simple synthesis route for gold鈥損olymer composite particles with controlled structure (multipetal structure and dumbbell structure) is developed. It is intriguing to observe that by controlling the reaction time and size of gold nanoparticles (AuNPs), tetrapetal-, tripetal-, and dumbbell-structured gold鈥損olystyrene composite are obtained via seeded polymerization. The average number of petals on a single AuNP increases with the AuNP diameter. These particles show potential applications as building blocks for advanced ordered and hierarchical supracolloidal materials. Further, with the incorporation of poly(N-isopropylacrylamide) (PNIPAm), 鈥渟mart鈥?thermoresponsive dumbbell-structured gold鈥揚NIPAm/polystyrene composite particles are formed. Significant size variation is validated for particles with 83 and 91 wt % PNIPAm content around lower critical solution temperature (LCST), which results in self-modulated catalytic activity.