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Metallic Nanodot Patterns with Unique Symmetries Templated from ABC Triblock Terpolymer Networks
Karim Aissou1, Muhammad Mumtaz1, Alberto Alvarez-Fernandez1,2
1Laboratoire de Chimie des Polymères Organiques (LCPO), CNRS - ENSCPB - Université de Bordeaux, 16 Avenue Pey-Berland, F-33607, Pessac Cedex, France.
Abstract:
Nanotemplates derived from the self-assembly of AB-type block copolymers provide an elegant route to achieve well-defined metallic dot arrays, even if the variety of pattern symmetries is restricted due to the limited number of structures offered by microphase separated diblock copolymers. A strategy that relies on the use of complex network structures accessible through the self-assembly of linear ABC-type terpolymers is presented for the formation of metallic nanodots arrays with "outside-the-box" symmetries. Patterned templates formed by the cubic Q214 and orthorhombic O70 network structures are used as excellent platforms to build well-ordered gold nanodot arrays with unique p3m1 and p2 symmetries, respectively. A simple yet efficient blending strategy is used to tune the critical dimensions of the p3m1 pattern while laterally ordered gold nanodot arrays are also demonstrated through a directed self-assembly approach. Such highly ordered gold nanodots with tunable particle dimensions and array periods, enabling the control of their plasmonic responses, are attractive probes for biological imaging.
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