Effects of Surface Free Energy on Orientational Assembly of Hexaazatrinaphtalene-Based Discotic Mesogen in Sandwich-Type Structure

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概要

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• The molecular stacking of a hexaazatrinaphtalene-based discogen sandwiched between two flat glass substrates has been studied. The surface free energy of the substrates was found to significantly influence the way the discotic molecules anchor on the surface. The surface free energy of the substrates was changed by means of O2 plasma buffing. The discotic molecules tend to anchor with their disc-face toward the substrates with high surface free energy, and the other molecules stack on to form the homeotropically aligned columnar phase. A decrease in the surface free energy of the substrate leads to the discotic columns tilting away from the normal to the substrate.

• 2011-02-25

著者

• Ong Chi

  Department Of Chemistry National Sun Yat Sen University

• Zheng Wenjun

  Department Of Material Chemistry College Of Chemistry Nankai University

• Hu Ya-Ting

  Department of Photonics, National Sun Yat-Sen University, 70 Lien-Hai Road, Kaohsiung 804, Taiwan, R.O.C.

• Chiang Cheng-Yan

  Department of Photonics, National Sun Yat-Sen University, 70 Lien-Hai Road, Kaohsiung 804, Taiwan, R.O.C.

• Ong Chi

  Department of Chemistry, National Sun Yat-Sen University, 70 Lien-Hai Road, Kaohsiung 804, Taiwan, R.O.C.

• Zheng Wenjun

  Department of Photonics, National Sun Yat-Sen University, 70 Lien-Hai Road, Kaohsiung 804, Taiwan, R.O.C.

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• Effects of Surface Free Energy on Orientational Assembly of Hexaazatrinaphtalene-Based Discotic Mesogen in Sandwich-Type Structure

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