Orientational behavior of discotic nematic phase for a discotic liquid crystalline triphenylene on polyimide and alkylammoniumbromide coated substrates

Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals

Volumn 370, Issue , 2001, Pages 241-244

  Monobe, Hirosato ^a   Mima, Shoji ^a   Ukon, Masakatsu ^b   Sugino, Takushi ^a   Shimizu, Yo ^a  

^a NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY AIST   (Japan)

^b JAPAN CHEMICAL INNOVATION INSTITUTE   (Japan)

Author keywords

Alignment; Discotic liquid crystal; Discotic nematic phase; Order parameter, triphenylene

Indexed keywords

EID: 0012155195     PISSN: 1058725X     EISSN: None     Source Type: Journal    
DOI: 10.1080/10587250108030079     Document Type: Article

References (8)

1. S. Chandrasekhar, "Liquid Crystals." 2nd ed, Cambridge University Press, Cambridge (1992).
2. G. Kruk, A. Kocot, R. Wrzalik, J. K. Vij, O. Karthaus, H. Ringsdorf, Liq. Cryst., 14, 807 (1993).
3. T. S. Perova, J. K. Vij, Adv. Mater., 7, 919 (1995).
4. K. Sakamoto, R. Arafune, N. Ito, S. Ushioda, Y. Zuzuki, S. Morokawa, J. Appl. Phys., 80, 431 (1996).
5. S. Ikeda, Y. Takanishi, K. Ishikawa, H. Takezoe, Mol. Cryst. Liq. Cryst., 329, 1201 (1999).
6. C. D. Favre-Nicolin, J. L. Lub, P. van der Sluis, Mol Cryst. Liq. Cryst., 299, 157 (1997).
7. C. Destrade, N. H. Tinh, H. Gasparoux, J. Malthete, A. M. Levelut, Mol. Cryst., Liq, Cryst., 71, 111 (1981).
8. 2θ>, where a is the angle between the functional group and the normal to the substrate, and θ is the angle between the direction of the transition dipole moment and the direction of an incident IR light. The order parameter S is defined by S = 2(R - 1) (at α = 90°) and S = l - R (at α = 0°).