Influence of Substrate Surface Properties on Spin Dewetting, Texture, and Phase Transitions of 5CB Liquid-Crystal Thin Films

Thermally induced nematic to isotropic (N–I) phase transition and dewetting of 5CB liquid crystal thin films on flat and topographically patterned substrates.

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Effects of surface-extended inorganic particles on phase transitions and luminescence properties of 5CB liquid crystal

Molecular Crystals and Liquid Crystals ◽

10.1080/15421406.2020.1731093 ◽

2020 ◽

Vol 696 (1) ◽

pp. 55-64

Author(s):

Tamara Bezrodna ◽

Georgyi Klishevich ◽

Volodymyr Melnyk ◽

Vira Nesprava ◽

Olexandr Roshchin ◽

...

Keyword(s):

Phase Transitions ◽

Liquid Crystal ◽

Luminescence Properties ◽

Inorganic Particles ◽

5Cb Liquid Crystal

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Thin Films of a Main-Chain Columnar Liquid Crystal: Studies of Structure, Phase Transitions, and Alignment

Macromolecules ◽

10.1021/ma802666a ◽

2009 ◽

Vol 42 (10) ◽

pp. 3500-3509 ◽

Cited By ~ 13

Author(s):

Matthieu Defaux ◽

Loïc Vidal ◽

Martin Möller ◽

Raluca I. Gearba ◽

Elaine DiMasi ◽

...

Keyword(s):

Thin Films ◽

Phase Transitions ◽

Liquid Crystal ◽

Main Chain ◽

Structure Phase

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Enhancement of Spontaneous Polarization and Acid Vapor-Induced Polymerization in the Thin-Film States of Phenylterthiophene Derivative Bearing a Cyclotetrasiloxane Ring

Crystals ◽

10.3390/cryst10110983 ◽

2020 ◽

Vol 10 (11) ◽

pp. 983

Author(s):

Jumpei Nakagawa ◽

Atsushi Seki ◽

Masahiro Funahashi

Keyword(s):

Thin Film ◽

Thin Films ◽

Liquid Crystal ◽

Spontaneous Polarization ◽

Liquid Crystalline ◽

Substrate Surface ◽

Helical Structure ◽

Polymerization Process ◽

Ferroelectric Liquid Crystal ◽

Acid Vapor

We have achieved the measurement of spontaneous polarization of spin-coated thin films of a ferroelectric liquid crystal based on a phenylterthiophene skeleton. Uniaxially aligned spin-coated films with a thickness of 100 nm were prepared by the friction transfer method. The spontaneous polarization of the spin-coated films was measured by the Sawyer–Tower method and polarization inversion current technique under the application of triangular-wave bias. These measurements revealed the spontaneous polarization of 50 nC cm−2 in the thin-film state which is 1.5 times larger than the value of 35 nC cm−2 in the bulk state. This result should be attributed to the strong anchoring of the liquid-crystalline molecules on the substrate surface and the inhibition of polarization relaxation caused by the formation of the helical structure. Moreover, insolubilization of the thin films was carried out by an in situ ring-opening polymerization induced by acid vapors. The molecular alignment in the thin films of the ferroelectric liquid crystal was retained during the polymerization process.

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Effect of sputtering condition on the surface properties of silicon oxide thin films prepared for liquid crystal alignment layers

Displays ◽

10.1016/j.displa.2010.02.005 ◽

2010 ◽

Vol 31 (2) ◽

pp. 93-98

Author(s):

Shi-Joon Sung ◽

Eun Ae Jung ◽

Dae-Hwan Kim ◽

Jin-Kyu Kang ◽

Kee-Jeong Yang ◽

...

Keyword(s):

Thin Films ◽

Liquid Crystal ◽

Surface Properties ◽

Silicon Oxide ◽

Oxide Thin Films ◽

Liquid Crystal Alignment ◽

Crystal Alignment ◽

Alignment Layers

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Non-isothermal kinetics of melting and nematic to isotropic phase transitions of 5CB liquid crystal

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-010-0837-2 ◽

2010 ◽

Vol 102 (2) ◽

pp. 627-632 ◽

Cited By ~ 10

Author(s):

Dipti Sharma

Keyword(s):

Phase Transitions ◽

Liquid Crystal ◽

Isothermal Kinetics ◽

Isotropic Phase ◽

5Cb Liquid Crystal ◽

Kinetics Of

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Observations on the growth of YBa2Cu3O7-δ thin films on MgO by pulsed-laser ablation

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100089652 ◽

1991 ◽

Vol 49 ◽

pp. 1068-1069

Author(s):

M. Grant Norton ◽

C. Barry Carter

Keyword(s):

Thin Film ◽

Thin Films ◽

Laser Ablation ◽

Substrate Surface ◽

Pulsed Laser ◽

Pulsed Laser Ablation ◽

Thin Film Deposition ◽

Film Deposition ◽

Laser Ablation Process ◽

Deposition Parameters

Pulsed-laser ablation has been widely used to produce high-quality thin films of YBa2Cu3O7-δ on a range of substrate materials. The nonequilibrium nature of the process allows congruent deposition of oxides with complex stoichiometrics. In the high power density regime produced by the UV excimer lasers the ablated species includes a mixture of neutral atoms, molecules and ions. All these species play an important role in thin-film deposition. However, changes in the deposition parameters have been shown to affect the microstructure of thin YBa2Cu3O7-δ films. The formation of metastable configurations is possible because at the low substrate temperatures used, only shortrange rearrangement on the substrate surface can occur. The parameters associated directly with the laser ablation process, those determining the nature of the process, e g. thermal or nonthermal volatilization, have been classified as ‘primary parameters'. Other parameters may also affect the microstructure of the thin film. In this paper, the effects of these ‘secondary parameters' on the microstructure of YBa2Cu3O7-δ films will be discussed. Examples of 'secondary parameters' include the substrate temperature and the oxygen partial pressure during deposition.

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