Abstract
| Language | English |
|---|---|
| Pages | 1841-1844 |
| Number of pages | 3 |
| Journal | Journal of Applied Physics |
| Volume | 92 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2002 |
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Keywords
- liquid-crystal alignment
- photoalignment
- nematics
- liquid crystals
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Competitive effect of grooves and photoalignment on nematic liquid-crystal alignment using azobenzene polymer. / Chang, Doo-Han; Fukuda, Takashi; Takanishi, Yoichi; Ishikawa, Ken; Matsuda, Hiro; Takezoe, Hideo; Osipov, Mikhail A.
In: Journal of Applied Physics, Vol. 92, No. 4, 2002, p. 1841-1844.Research output: Contribution to journal › Article
TY - JOUR
T1 - Competitive effect of grooves and photoalignment on nematic liquid-crystal alignment using azobenzene polymer
AU - Chang, Doo-Han
AU - Fukuda, Takashi
AU - Takanishi, Yoichi
AU - Ishikawa, Ken
AU - Matsuda, Hiro
AU - Takezoe, Hideo
AU - Osipov, Mikhail A.
PY - 2002
Y1 - 2002
N2 - Effect of an anisotropic photoalignment layer and microgrooves on nematic liquid-crystal (LC) alignment was quantitatively examined using azobenzene polymer thin film with surface relief grating (SRG) of about 1 µm pitch. The SRG with various modulation depths was treated with polarized light irradiation to align molecules at 45° from the groove. Nematic LC molecules, 4-n-pentyl-4-cyanobiphenyl, orient to the photoaligned direction on the SRG being shallower than 200 nm. The orientation rather sharply deviates from the photoaligned direction toward the groove direction with increasing grating depth into the deeper region than 200 nm and finally becomes parallel to the grooves on the SRG of 400 nm deep. This behavior is successfully simulated by the consideration of anisotropic surface interaction and an elastic energy of LCs.
AB - Effect of an anisotropic photoalignment layer and microgrooves on nematic liquid-crystal (LC) alignment was quantitatively examined using azobenzene polymer thin film with surface relief grating (SRG) of about 1 µm pitch. The SRG with various modulation depths was treated with polarized light irradiation to align molecules at 45° from the groove. Nematic LC molecules, 4-n-pentyl-4-cyanobiphenyl, orient to the photoaligned direction on the SRG being shallower than 200 nm. The orientation rather sharply deviates from the photoaligned direction toward the groove direction with increasing grating depth into the deeper region than 200 nm and finally becomes parallel to the grooves on the SRG of 400 nm deep. This behavior is successfully simulated by the consideration of anisotropic surface interaction and an elastic energy of LCs.
KW - liquid-crystal alignment
KW - photoalignment
KW - nematics
KW - liquid crystals
UR - http://dx.doi.org/10.1063/1.1493658
U2 - 10.1063/1.1493658
DO - 10.1063/1.1493658
M3 - Article
VL - 92
SP - 1841
EP - 1844
JO - Journal of Applied Physics
T2 - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 4
ER -