Fabrication of Core鈥揝hell Polymer Nanospheres in the Nanopores of Anodic Aluminum Oxide Templates Using Polymer Blend Solutions

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• 作者：Hao-Wen Ko ; Mu-Huan Chi ; Chun-Wei Chang ; Chien-Wei Chu ; Ke-Hsuan Luo ; Jiun-Tai Chen
• 刊名：ACS Macro Letters
• 出版年：2015
• 出版时间：July 21, 2015
• 年：2015
• 卷：4
• 期：7
• 页码：717-720
• 全文大小：320K
• ISSN：2161-1653

文摘

Spherical core鈥搒hell structures have been widely investigated in recent years, and they can be used for various applications, such as drug delivery, biological labeling, and batteries. Although many methods have been developed to prepare core鈥搒hell structures, it is still a great challenge to fabricate core鈥搒hell structures in the nanoscale with well-controlled morphologies and sizes. In this work, we present a simple method to fabricate core鈥搒hell polymer nanospheres consisting of polystyrene (PS) cores and poly(methyl methacrylate) (PMMA) shells. The nanostructures are prepared by a solution-based template wetting method. After the nanopores of anodic aluminum oxide (AAO) templates are wetted sequentially by PS/PMMA blend solutions and water, the core鈥搒hell nanostructures can be formed. The formation process is related to the Rayleigh-instability-type transformation. Selective removal techniques are also used to confirm the morphologies of the core鈥搒hell nanostructures.