• KOUHEI TANAKA

      Articles written in Bulletin of Materials Science

    • Facile method to align crystalline needles composed of organic semiconducting materials using a balance between centrifugal and capillary forces

      MASASHI WATANABE KOUHEI TANAKA

      More Details Abstract Fulltext PDF

      Methods to align one-dimensional microstructures composed of organic materials have attracted much attentionbecause of their potential applications to devices such as field-effect transistors. Although dip coating is one of the methods(using self-assembly) used for the purpose, its disadvantage is that a larger amount of the material dissolves in the solutionthan what actually gets deposited on substrate. In this study, we developed a novel method that requires a small amountof precursor solution. By placing a polydimethylsiloxane block on a glass substrate and rotating the substrate using a spincoater, a small amount of the precursor solution was confined in a narrow region along the foot of the block.When we usedan organic semiconducting material, 9,10-dibromoanthracene, as a solute, aligned and roughly oriented crystalline needleswere precipitated. The thicknesses and lengths of the crystalline needles were controlled by the composition of the solventand the rotation speed.

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      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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