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Journal of Display Technology

Journal of Display Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 5, Iss. 9 — Sep. 1, 2009
  • pp: 350–354

Strong Vertical Alignment of Liquid Crystal on Porous Anodic Aluminum Oxide Film

Tsung-Ta Tang, Cheng-Ying Kuo, Ru-Pin Pan, Jia-Min Shieh, and Ci-Ling Pan

Journal of Display Technology, Vol. 5, Issue 9, pp. 350-354 (2009)


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Abstract

Properties of anodic aluminum oxide (AAO) film as a liquid crystal (LC) alignment material is studied. We deposit the transparent porous AAO film on glass with the diameter of the pores controlled between 17–65 nm. The liquid crystal can be aligned vertically against the substrate with the AAO film. The measured polar anchoring strength is about 1.5$\,\times 10 ^{-5} {\rm J/m} ^{2}$, which is comparable to that of N,N-dimethyl-N-octadecyl-3-aminopropyl -trimethoxysilyl chloride (DMOAP) layer. AAO films with smaller pore diameters exhibit higher anchoring strengths. On the other hand, the uniformity of the pore array in the AAO films does not affect the alignment quality significantly.

© 2009 IEEE

Citation
Tsung-Ta Tang, Cheng-Ying Kuo, Ru-Pin Pan, Jia-Min Shieh, and Ci-Ling Pan, "Strong Vertical Alignment of Liquid Crystal on Porous Anodic Aluminum Oxide Film," J. Display Technol. 5, 350-354 (2009)
http://www.opticsinfobase.org/jdt/abstract.cfm?URI=jdt-5-9-350

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