ICCAS OpenIR
A combined method based on rubbing and UV-irradiation for preparing stable alignment-layers with high pretilt angles
Cui, L; Jin, W; Liu, YB; Xie, P; Zhang, RB; Zhu, CF; Wang, C
1999
Source PublicationMOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS
ISSN1058-725X
Volume333Pages:135-+
AbstractA novel two-step method combining rubbing and UV-irradiation based on ladderlike polysilsesquioxanes (LPS) containing cinnamate and azobenzene side chains was developed to obtain alignment layers which features a high surface pretilt angle and goad stability. At the first step, a low pretilt angle of 1-3 degrees was generated by rubbing and at the second step, an increased pretilt angle of about 11 degrees was obtained through further UV-irradiation. The polarized optical micrograph and the conoscopic picture prove that good LC alignment state with a stable high pretilt angle can be obtained by in situ photo-crosslinking of the cinnamate side-chains through proper UV-irradiation. The high pretilt angle arises from the photo-induced tautomerization of azobenzene side chains and that is confirmed by AFM study. In particular, the annealing test near the clearing point indicates the high stability of the high pretilt state, which heralds their potential application in LCD such as producing a patterned alignment layer for improving view angle.
KeywordPolysilsesquioxanes Alignment Layer High Pretilt Angle
Indexed BySCI
Language英语
WOS IDWOS:000083046200010
PublisherGORDON BREACH SCI PUBL LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/75014
Collection中国科学院化学研究所
Corresponding AuthorZhang, RB
Affiliation1.Chinese Acad Sci, Inst Chem, PCLCC, Polymer Chem Lab, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Inst Chem, PCLCC, China Petrochem Corp, Beijing 100080, Peoples R China
3.Chinese Acad Sci, Youth Lab Nanosci & Technol, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Cui, L,Jin, W,Liu, YB,et al. A combined method based on rubbing and UV-irradiation for preparing stable alignment-layers with high pretilt angles[J]. MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS,1999,333:135-+.
APA Cui, L.,Jin, W.,Liu, YB.,Xie, P.,Zhang, RB.,...&Wang, C.(1999).A combined method based on rubbing and UV-irradiation for preparing stable alignment-layers with high pretilt angles.MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS,333,135-+.
MLA Cui, L,et al."A combined method based on rubbing and UV-irradiation for preparing stable alignment-layers with high pretilt angles".MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS 333(1999):135-+.
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