Tunable Polymer Brush/Au NPs Hybrid Plasmonic Arrays Based on Host鈥揼uest Interaction

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• 作者：Liping Fang ; Yunfeng Li ; Zhaolai Chen ; Wendong Liu ; Junhu Zhang ; Siyuan Xiang ; Huaizhong Shen ; Zibo Li ; Bai Yang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：November 26, 2014
• 年：2014
• 卷：6
• 期：22
• 页码：19951-19957
• 全文大小：412K
• ISSN：1944-8252

文摘

The fabrication of versatile gold nanoparticle (Au NP) arrays with tunable optical properties by a novel host鈥揼uest interaction are presented. The gold nanoparticles were incorporated into polymer brushes by host鈥揼uest interaction between 尾-cyclodextrin (尾-CD) ligand of gold nanoparticles and dimethylamino group of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA). The gold nanoparticle arrays were prepared through the template of PDMAEMA brush patterns which were fabricated combining colloidal lithography and surface-initiated atom-transfer radical polymerization (SI-ATRP). The structure parameters of gold nanoparticle patterns mediated by polymer brushes such as height, diameters, periods and distances, could be easily tuned by tailoring the etching time or size of colloidal spheres in the process of colloidal lithography. The change of optical properties induced by different gold nanoparticle structures was demonstrated. The direct utilization of PDMAEMA brushes as guest avoids a series of complicated modification process and the PDMAEMA brushes can be grafted on various substrates, which broaden its applications. The prepared gold naoparticle arrays are promising in applications of nanosensors, memory storage and surface enhanced spectroscopy.

Keywords:

gold nanoparticle arrays; host鈭抔uest interaction; tunable optical properties; hybrid; colloid lithography; polymer brush