Single Nanoparticle Localization in the Perforated Lamellar Phase of Self-Assembled Block Copolymer Driven by Entropy Minimization

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• 作者：Tae Won Nam ; Jae Won Jeong ; Min-Jae Choi ; Kwang Min Baek ; Jong Min Kim ; Yoon Hyung Hur ; YongJoo Kim ; Yeon Sik Jung
• 刊名：Macromolecules
• 出版年：2015
• 出版时间：November 10, 2015
• 年：2015
• 卷：48
• 期：21
• 页码：7938-7944
• 全文大小：525K
• ISSN：1520-5835

文摘

Although precisely controlled microdomains of block copolymers (BCP) provide an excellent guiding matrix for multiple nanoparticles (NPs) to be controllably segregated into a desired polymer block, localization and positioning of individual NPs have not been demonstrated. Here, we report a unique one-to-one positioning phenomenon of guest Au NPs in the host BCP microdomains; each of polystyrene-functionalized Au NPs is embedded within the perforation domain of hexagonally perforated lamellar (HPL) morphology of poly(dimethylsiloxane-b-styrene) BCP. The local minimization of free energy achieved by the placement of Au NPs into the center of the perforation domain is theoretically supported by the self-consistent field theory (SCFT) simulation. We propose a novel design principle for more precisely controllable nanocomposites by developing a new route of NP arrangement within a polymer matrix.