Porous and Pillar Structures Formed by Anodization for Vertical Alignment of Nematic Liquid Crystal

Lazarouk, S. K.; Muravski, Anatoli A.; Sasinovich, D. A.; Chigrinov, Vladimir G.; Kwok, Hoi Sing

doi:10.1143/jjap.46.6889

Cited by 19 publications

(12 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A high aspect ratio (length/diameter, h/D p > 2) of the AAO nanochannel is reported to be necessary for inducing a stable homeotropic LC orientation at high P. 33,[40][41][42] For the prepared AAO, h was found to be 5 µm and h/D p was calculated to be 62.5 and 50 at P = 0.65 and 0.73, respectively, which were found to be sufficient for achieving a stable to favor homeotropic anchoring. 43 In the N phase, the birefringence in the DRLM images is decreased as increasing P because the ratio of homeotropic-aligned LC molecules increases ( Figure S5).…”

Section: Resultsmentioning

confidence: 99%

“…Although the LC molecules preferred a particular orientation on the AAO film under specific pore dimensions, examining the anchoring conditions of the AAO film was difficult as only little differences in the optical textures were observed with changes in the orientation of the nematic (N) LC phase. 33 The relationship between the anchoring conditions and the porous AAO has not yet been systematically investigated due to the complex behavior of the LC phases.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Molecular Orientation of Liquid Crystals on Topographic Nanopatterns

Ryu

Yoon

2016

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Controlling the orientation of building blocks in soft matter on the substrate has been a big challenge in material sciences. We have controlled the molecular orientation of liquid crystal (LC) materials on the porous anodic aluminum oxide (AAO) film having hexagonal pore arrays on the top surface. In our method, anchoring conditions can be varied by changing the pore size (Dp) and the porosity (P). As a proof-of-concept, the orientation of smectic A (SmA) structure at different anchoring conditions was successfully controlled in a sandwich cell consisting of AAO and a glass substrate, which has not been successfully controlled by conventional methods.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Molecular Orientation of Liquid Crystals on Topographic Nanopatterns

Ryu

Yoon

2016

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Трубчатый оксид титана, формируемый электрохимическим анодным окислением титана, интенсивно исследуется последние годы из-за широких возможностей его применения при фотокатализе, в биомедицине, в качестве формозадающих матриц при синтезе композитных наноструктурированных материалов, в электронно-оптических приборах [1][2][3][4][5][6].…”

Section: Introductionunclassified

Механизм Формирования Трубчатого Оксида Титана Электрохимическим Анодированием

Лазарук¹,

Купреева²,

Циркунов³

et al. 2020

Журнал Технической Физики

View full text Add to dashboard Cite

The conditions for the formation of anodic titanium oxide with a tubular structure were studied. The mechanism for the formation of tubular titanium oxide based on the localization of the electrochemical oxidation of titanium in the places of the barrier layer at the bottom of the pore, where the density of the flowing anodic current is increased, as a result of which the temperature of these regions increases. With an increase in the temperature of the barrier layer above the threshold value, a transition from the traditional «honeycomb-like» porous structure to the tubular structure takes place. The proposed mechanism is confirmed by the results of experimental research.

show abstract

“…Tech Summary (1) Objective and Background An opportunity of LC alignment by substrates with porous surface has been demonstrated in [1][2][3][4][5]. There are high-purity aluminum layers subjected by anodic oxidation process and forming porous structure of aluminum oxide Al 2 O 3 .…”

mentioning

confidence: 99%

“…The type of the LC orientation depends on the pores' size and LC anchoring [7,10]. Design and fabrication of LCD elements with nanomesh alumina structure are presented in [3,4,10,11]. In [7] optical properties and surface resistance have been simulated for nanomesh alumina films by using FDTD Solutions LUMERICAl and COMSOL Multiphysics software.…”

mentioning

confidence: 99%

Nanomesh Aluminum Films for LC Alignment. Theoretical and Experimental Modeling

Dadivanyan

Belyaev

Чаусов

et al. 2015

Molecular Crystals and Liquid Crystals

View full text Add to dashboard Cite

This version is available at https://strathprints.strath.ac.uk/55796/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. Methods of fabrication of nanomesh aluminum films for LC alignment and their structure are described. A dependence of the pores' diameter vs. their fabrication conditions is found. A dependence of the alumina nanomesh on the pores' performances is simulated too.A theory of LC alignment in such system is proposed that allows prediction of the alignment type and explain experimental data. The LC orientation type is determined by the free anchoring energy and the micropore diameter. The difference of both planar and homeotropic anchoring energy is lower than the interaction energy by two orders of magnitude.

show abstract

Porous and Pillar Structures Formed by Anodization for Vertical Alignment of Nematic Liquid Crystal

Cited by 19 publications

References 12 publications

Molecular Orientation of Liquid Crystals on Topographic Nanopatterns

Molecular Orientation of Liquid Crystals on Topographic Nanopatterns

Механизм Формирования Трубчатого Оксида Титана Электрохимическим Анодированием

Nanomesh Aluminum Films for LC Alignment. Theoretical and Experimental Modeling

Contact Info

Product

Resources

About