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Relative kinetic stability of defect patterns in two-dimensional nematic liquid crystals with rectangular confinement.

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Názov: Relative kinetic stability of defect patterns in two-dimensional nematic liquid crystals with rectangular confinement.
Autori: Zhang, Xiao-Jie, Sun, Yu-Wei, Li, Zhan-Wei, Sun, Zhao-Yan
Zdroj: Journal of Chemical Physics; 8/21/2024, Vol. 161 Issue 7, p1-13, 13p
Predmety: LIQUID crystals, UNIFORMITY, NEMATIC liquid crystals, ENGINEERING
Abstrakt: Guiding and dynamically modulating topological defects are critical challenges in defect engineering of liquid crystals. Here, we employ molecular dynamics simulations to investigate the transition dynamics and relative kinetic stability of defect patterns in two-dimensional nematic Gay–Berne liquid crystals confined within rectangular geometries. We observe the formation of various defect patterns including long-axis, diagonal, X-shaped, composite, and bend configurations under different confinement conditions. The competition between boundary effects and the uniformity of nematic orientation induces the continuous realignment of liquid crystal molecules, facilitating the spatially continuous transformation of defect patterns over time. This transition involves changes in both defect types and their locations, typically initiating from defect regions. Furthermore, we demonstrate that the relative stability of these defect patterns can be effectively controlled by adjusting confinement parameters and external field conditions. Our findings provide fundamental insights into the transition kinetics of defect patterns in confined nematic liquid crystals, thereby enhancing our ability to manipulate topological defects for advanced applications. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Chemical Physics is the property of American Institute of Physics 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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  Label: Title
  Group: Ti
  Data: Relative kinetic stability of defect patterns in two-dimensional nematic liquid crystals with rectangular confinement.
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  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Xiao-Jie%22">Zhang, Xiao-Jie</searchLink><br /><searchLink fieldCode="AR" term="%22Sun%2C+Yu-Wei%22">Sun, Yu-Wei</searchLink><br /><searchLink fieldCode="AR" term="%22Li%2C+Zhan-Wei%22">Li, Zhan-Wei</searchLink><br /><searchLink fieldCode="AR" term="%22Sun%2C+Zhao-Yan%22">Sun, Zhao-Yan</searchLink>
– Name: TitleSource
  Label: Source
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  Data: Journal of Chemical Physics; 8/21/2024, Vol. 161 Issue 7, p1-13, 13p
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  Data: <searchLink fieldCode="DE" term="%22LIQUID+crystals%22">LIQUID crystals</searchLink><br /><searchLink fieldCode="DE" term="%22UNIFORMITY%22">UNIFORMITY</searchLink><br /><searchLink fieldCode="DE" term="%22NEMATIC+liquid+crystals%22">NEMATIC liquid crystals</searchLink><br /><searchLink fieldCode="DE" term="%22ENGINEERING%22">ENGINEERING</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Guiding and dynamically modulating topological defects are critical challenges in defect engineering of liquid crystals. Here, we employ molecular dynamics simulations to investigate the transition dynamics and relative kinetic stability of defect patterns in two-dimensional nematic Gay–Berne liquid crystals confined within rectangular geometries. We observe the formation of various defect patterns including long-axis, diagonal, X-shaped, composite, and bend configurations under different confinement conditions. The competition between boundary effects and the uniformity of nematic orientation induces the continuous realignment of liquid crystal molecules, facilitating the spatially continuous transformation of defect patterns over time. This transition involves changes in both defect types and their locations, typically initiating from defect regions. Furthermore, we demonstrate that the relative stability of these defect patterns can be effectively controlled by adjusting confinement parameters and external field conditions. Our findings provide fundamental insights into the transition kinetics of defect patterns in confined nematic liquid crystals, thereby enhancing our ability to manipulate topological defects for advanced applications. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Chemical Physics is the property of American Institute of Physics 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:
      – Type: doi
        Value: 10.1063/5.0224224
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      – Code: eng
        Text: English
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        PageCount: 13
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        Type: general
      – SubjectFull: UNIFORMITY
        Type: general
      – SubjectFull: NEMATIC liquid crystals
        Type: general
      – SubjectFull: ENGINEERING
        Type: general
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      – TitleFull: Relative kinetic stability of defect patterns in two-dimensional nematic liquid crystals with rectangular confinement.
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            NameFull: Zhang, Xiao-Jie
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            NameFull: Sun, Yu-Wei
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            NameFull: Li, Zhan-Wei
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            – D: 21
              M: 08
              Text: 8/21/2024
              Type: published
              Y: 2024
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              Value: 7
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            – TitleFull: Journal of Chemical Physics
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