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Nano/microgroove zirconium‐doped lanthanum oxide film with self‐aligned molecules for liquid crystal device application.

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Title: Nano/microgroove zirconium‐doped lanthanum oxide film with self‐aligned molecules for liquid crystal device application.
Authors: Choi, Bo‐Kyeong1 (AUTHOR), Oh, Jin Young1 (AUTHOR), Kim, Dae‐Hyun2 (AUTHOR), Lee, Dong Wook3 (AUTHOR) dongwlee@jj.ac.kr, Seo, Dae‐Shik1 (AUTHOR) dsseo@yonsei.ac.kr
Source: Surface & Interface Analysis: SIA. Oct2024, Vol. 56 Issue 10, p743-750. 8p.
Subjects: Liquid crystal films, Substrates (Materials science), Liquid crystal devices, Lanthanum oxide, Atomic force microscopy
Abstract: Herein, we propose a brush‐coated zirconium‐doped lanthanum oxide (ZrLaO) film as a liquid crystal (LC) alignment layer. The film‐curing temperature was adjusted to 70, 150, and 230°C. Polarized optical microscopy and pre‐tilt angle analysis confirmed that there was uniform and homogeneous LC alignment on the 230°C cured ZrLaO film. Atomic force microscopy revealed that the surface had a nano/microgroove structure, which was caused by the shear stress generated by the brush‐coating process. This structure induced the uniform LC alignment. X‐ray photoelectron spectroscopy verified that the ZrLaO film was well‐formed on a glass substrate. The ZrLaO film displayed hydrophilic characteristics, and its surface energy increased as the film‐curing temperature increased. The ZrLaO alignment layer displayed suitable optical transmittance for LC device applications. The ZrLaO layer‐based twisted‐nematic LC cell exhibited more stable switching properties and better threshold voltage characteristics than conventional polyimide layers. Therefore, we expect that this brush‐coated ZrLaO layer will be a suitable LC alignment layer for LC device applications. [ABSTRACT FROM AUTHOR]
Copyright of Surface & Interface Analysis: SIA is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Header DbId: egs
DbLabel: Engineering Source
An: 180170615
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Nano/microgroove zirconium‐doped lanthanum oxide film with self‐aligned molecules for liquid crystal device application.
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  Data: <searchLink fieldCode="AR" term="%22Choi%2C+Bo‐Kyeong%22">Choi, Bo‐Kyeong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Oh%2C+Jin+Young%22">Oh, Jin Young</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Dae‐Hyun%22">Kim, Dae‐Hyun</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lee%2C+Dong+Wook%22">Lee, Dong Wook</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> dongwlee@jj.ac.kr</i><br /><searchLink fieldCode="AR" term="%22Seo%2C+Dae‐Shik%22">Seo, Dae‐Shik</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dsseo@yonsei.ac.kr</i>
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  Data: <searchLink fieldCode="JN" term="%22Surface+%26+Interface+Analysis%3A+SIA%22">Surface & Interface Analysis: SIA</searchLink>. Oct2024, Vol. 56 Issue 10, p743-750. 8p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Liquid+crystal+films%22">Liquid crystal films</searchLink><br /><searchLink fieldCode="DE" term="%22Substrates+%28Materials+science%29%22">Substrates (Materials science)</searchLink><br /><searchLink fieldCode="DE" term="%22Liquid+crystal+devices%22">Liquid crystal devices</searchLink><br /><searchLink fieldCode="DE" term="%22Lanthanum+oxide%22">Lanthanum oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Atomic+force+microscopy%22">Atomic force microscopy</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Herein, we propose a brush‐coated zirconium‐doped lanthanum oxide (ZrLaO) film as a liquid crystal (LC) alignment layer. The film‐curing temperature was adjusted to 70, 150, and 230°C. Polarized optical microscopy and pre‐tilt angle analysis confirmed that there was uniform and homogeneous LC alignment on the 230°C cured ZrLaO film. Atomic force microscopy revealed that the surface had a nano/microgroove structure, which was caused by the shear stress generated by the brush‐coating process. This structure induced the uniform LC alignment. X‐ray photoelectron spectroscopy verified that the ZrLaO film was well‐formed on a glass substrate. The ZrLaO film displayed hydrophilic characteristics, and its surface energy increased as the film‐curing temperature increased. The ZrLaO alignment layer displayed suitable optical transmittance for LC device applications. The ZrLaO layer‐based twisted‐nematic LC cell exhibited more stable switching properties and better threshold voltage characteristics than conventional polyimide layers. Therefore, we expect that this brush‐coated ZrLaO layer will be a suitable LC alignment layer for LC device applications. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Surface & Interface Analysis: SIA is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
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        Value: 10.1002/sia.7344
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 743
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      – SubjectFull: Liquid crystal films
        Type: general
      – SubjectFull: Substrates (Materials science)
        Type: general
      – SubjectFull: Liquid crystal devices
        Type: general
      – SubjectFull: Lanthanum oxide
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      – SubjectFull: Atomic force microscopy
        Type: general
    Titles:
      – TitleFull: Nano/microgroove zirconium‐doped lanthanum oxide film with self‐aligned molecules for liquid crystal device application.
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          Name:
            NameFull: Choi, Bo‐Kyeong
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            NameFull: Oh, Jin Young
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            NameFull: Kim, Dae‐Hyun
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            NameFull: Lee, Dong Wook
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            NameFull: Seo, Dae‐Shik
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            – D: 01
              M: 10
              Text: Oct2024
              Type: published
              Y: 2024
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              Value: 56
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              Value: 10
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            – TitleFull: Surface & Interface Analysis: SIA
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