Translating 2D director profile to 3D topography in a liquid crystal polymer

Pengrong Lv, Yuxin You, Junyu Li, Yang Zhang, Dirk J. Broer, Jiawen Chen, Guofu Zhou, Wei Zhao, Danqing Liu

Translating 2D director profile to 3D topography in a liquid crystal polymer

ABSTRACT

Morphological properties of surfaces play a key role in natural and man-madeobjects. The development of robust methods to fabricate micro/nano surfacestructures has been a long pursuit. Herein, an approach based on molecularself-assembling of liquid crystal polymers (LCPs) is presented to directlytranslate D molecular director profiles obtained by a photoalignmentprocedure into D topographies, without involving further multi-steplithographic processes. The principle of surface deformation from a flatmorphology into complex topographies is based on the coupling betweenelectrostatic interactions and the anisotropic flow in LCPs. When activated byan electric field, the LCP melts and is driven by electrohydrodynamicinstabilities to connect the electrode plates of a capacitor, inducingtopographies governed by the director profile of the LCP. Upon switching othe electric field, the formed structures vitrify as the temperature decreasesbelow the glass transition. When heated, the process is reversible as theformed topographies disappear. By pre-programming the molecular director avariety of structures could be made with increasing complexity. The height,pitch, and the aspect ratio of the textures are further regulated by theconditions of the applied electric field. The proposed approach will open newopportunities for optical and electrical applications

 

Language English
Journal Advanced Science
Year
2021
Article number
2004749
Status

published


KEYWORDS

dielectric structuring, dynamic surface topographies, imprinted polymer flow pattern, liquid crystal polymer


DOI: 10.1002/advs.202004749

Fingerprint

  • smart coating

    smart coating


  • switchable topology

    switchable topology


  • liquid crystal polymer

    liquid crystal polymer


  • thermoresponsive

    thermoresponsive

  • dynamic surface

    dynamic surface

Cite this

  • APA
Pengrong Lv, Yuxin You, Junyu Li, Yang Zhang, Dirk J. Broer, Jiawen Chen, Guofu Zhou, Wei Zhao, Danqing Liu. Translating 2D director profile to 3D topography in a liquid crystal polymer. Advanced Science. 2021, 2004749.

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