Liquid crystal alignment induced by controllable surface wettability of BiFeO3 bumps thin layer

被引：5

作者：

Liu, Yang ^{[1
]}

Liu, Kaihua ^{[2
]}

Wen, Pushan ^{[3
]}

Oh, Byeong-Yun ^{[4
]}

Park, Hong-Gyu ^{[1
]}

Seo, Dae-Shik ^{[1
]}

机构：

[1] Yonsei Univ, Dept Elect & Elect Engn, Informat Display Device Lab, Seoul 120749, South Korea

[2] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea

[3] Zunyi Normal Coll, Dept Chem & Chem Engn, Zunyi, Peoples R China

[4] Gwangju Inst Sci & Technol, Business Incubator, ZeSHTech Co Ltd, Gwangju, South Korea

来源：

LIQUID CRYSTALS | 2016年 / 43卷 / 03期

关键词：

BFO; alignment; thermal annealing; surface wettability; Liquid crystals; ZINC-OXIDE FILMS; POLYIMIDE SURFACES; COMMAND SURFACES; TRANSPARENT; DISPLAYS; POLYMER; ANGLES; GROWTH;

D O I：

10.1080/02678292.2015.1108465

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The alignment of liquid crystals (LCs) in LC-based optical devices determines the visual quality of devices, and a simple pretreatment is necessary for LC alignment. Here, we present a BiFeO3 (BFO) thin layer working as an alignment layer, homogeneously aligning LCs after a pre-thermal annealing treatment. Dramatic BFO bumps were observed during the thermal annealing process, and a corresponding enhancement in wettability was detected from measurement of tunable contact angles. LCs in the BFO bump thin layer sandwiched TN cell were found to be perfectly homogeneously aligned due to the enhanced anisotropy and wettability caused by the morphology change of the thin layer.

引用

页码：320 / 326

页数：7

共 37 条

[1] Liquid crystal pretilt angle control using adjustable wetting properties of alignment layers
Ahn, Han Jin
Kim, Jong Bok
Kim, Kyung Chan
Hwang, Byoung Har
Kim, Jong Tae
Baik, Hong Koo
Park, Jin Seol
Kang, Daeseung
[J]. APPLIED PHYSICS LETTERS, 2007, 90 (25)
[2] Ban BS, 1999, J APPL POLYM SCI, V74, P267, DOI 10.1002/(SICI)1097-4628(19991010)74:2<267::AID-APP5>3.0.CO
[3] 2-#
[4] SOLID SURFACE SHAPE AND ALIGNMENT OF AN ADJACENT NEMATIC LIQUID-CRYSTAL
BERREMAN, DW
[J]. PHYSICAL REVIEW LETTERS, 1972, 28 (26) : 1683 - &
[5] Wettability of porous surfaces.
Cassie, ABD
Baxter, S
[J]. TRANSACTIONS OF THE FARADAY SOCIETY, 1944, 40 : 0546 - 0550
[6] Chatrlain P, 1941, CR HEBD ACAD SCI, V213, P875
[7] Atomic-beam alignment of inorganic materials for liquid-crystal displays
Chaudhari, P
Lacey, J
Doyle, J
Galligan, E
Lien, SCA
Callegari, A
Hougham, G
Lang, ND
Andry, PS
John, R
Yang, KH
Lu, MH
Cai, C
Speidell, J
Purushothaman, S
Ritsko, J
Samant, M
Stöhr, J
Nakagawa, Y
Katoh, Y
Saitoh, Y
Sakai, K
Satoh, H
Odahara, S
Nakano, H
Nakagaki, J
Shiota, Y
[J]. NATURE, 2001, 411 (6833) : 56 - 59
[8] Tunable Surface Wettability of ZnO Nanoparticle Arrays for Controlling the Alignment of Liquid Crystals
Chung, Yueh-Feng
Chen, Mu-Zhe
Yang, Sheng-Hsiung
Jeng, Shie-Chang
[J]. ACS APPLIED MATERIALS & INTERFACES, 2015, 7 (18) : 9619 - 9624
[9] Cognard J., 1982, Alignment of nematic liquid crystals and their mixtures
[10] Reversible super-hydrophobicity to super-hydrophilicity transition of aligned ZnO nanorod films
Feng, XJ
Feng, L
Jin, MH
Zhai, J
Jiang, L
Zhu, DB
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (01) : 62 - 63

← 1 2 3 4 →