• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1989 Fiscal Year Final Research Report Summary

Quantitative measurement and control of surface orientation energy of liquid crystal molecule on solid surfaces

Research Project

Project/Area Number 63550225
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 電子材料工学
Research InstitutionTohoku University

Principal Investigator

UCHIDA Tatsuo  Tohoku Univ., Faculty of Eng., Professor, 工学部, 教授 (60091659)

Project Period (FY) 1988 – 1989
Keywordsliquid crystal / molecular orientation / surface alignment / surface anchoring / anchoring energy / ferroelectric liquid crystal
Research Abstract

It is important to clarify the surface alignment of liquid crystal on solid surfaces for physical problem as well as for application to devices, and various researches have been done. However, the surface alignment strength or anchoring energy have not yet been clarified. The research of this grant has focused on this problem and the following results have been obtained.
1. A method to measure the surface alignment strength (anchoring energy) has been clarified for substrates whose surface is coated with polymer and rubbed with cloth. 2. Effect of the rubbing strength on the anchoring energy has been investigated by using the newly developed method mentioned above. It was clarified from the results that the anchoring energy was directly depending on the rubbing density. In addition, a reliable and accurate method to control the surface energy was established. 3. Effect of surface anchoring energy, which was controlled by the above mentioned method, on molecular alignment of ferroelectric liquid crystal is investigated. From the results, it was succeeded to form the ideal uniform alignment (bookshelf structure) of the ferroelectric liquid crystal by decreasing the anchoring energy lower than a critical value, which enables to realize electro-optical devices with fast response of microsecond order and excellent memory characteristics. 4. Detailed surface physics which dominate the anchoring energy has not yet been clarified. Clarification of this point is an important future subject.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] A.Uchida: "Director Orientation of a Ferroelectric Liquid Crystals on Substrates with Rubbing Treatment:The Effect of Surface Anchoring Strength" Liquid Crystals. 5. 1127-1137 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 酒井英明: "強誘電性液晶の分子配向に関する研究" 東北大学電通談話会記録. 57. 170-171 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Uchida: "Director Orientation of Ferroelectric Liquid Crystal on Substrates with Rubbing Treatment: The Effect of Surface Anchoring Strength" Liquid Crystals. 5-4. 1127-1137 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Sakai: "Molecular Orientation of Ferroelectric Liquid Crystal" The Record of Electrical and Communication Engineering Conversation Tohoku University. 57-4. 170-171 (1989)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1993-03-26  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi