Homeotropic liquid crystal device employing vertically aligned carbon nanotube arrays as the alignment agent

Basu, Rajratan; Atwood, Lukas J.

doi:10.1103/physreve.102.022701

Cited by 13 publications

(8 citation statements)

References 34 publications

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“…Similarly, it was very recently demonstrated that also a vertically aligned liquid crystal device can be constructed with nanotube electrodes and alignment [116]. Nanotubes are (nearly) vertically grown on the substrate, and the liquid crystal orients perpendicular with its long molecular axis to the substrates on both sides.…”

Section: Single-wall and Multi-wall Carbon Nanotubesmentioning

confidence: 96%

“…The response is similar for the nanotube electrodes as compared to a commercial cell. (Reproduced by permission from [116]).…”

Section: Single-wall and Multi-wall Carbon Nanotubesmentioning

confidence: 99%

“…Several materials were shown to be candidates for a sufficiently transparent yet highly conductive ITO-free technology, including hybrid materials and composites. We will now specifically address some of the applications based on liquid crystals that incorporate these ITO-free electrodes, besides the already mentioned twisted nematic TN cells [103,136] or the vertically aligned switching devices with negative dielectric liquid crystal [116].…”

Section: Applications Of Carbon-based Ito-free Technologiesmentioning

confidence: 99%

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Carbon Allotropes as ITO Electrode Replacement Materials in Liquid Crystal Devices

Dierking

2020

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Indium tin oxide (ITO)-free optoelectronic devices have been discussed for a number of years in the light of a possible indium shortage as demand rises. In particular, this is due to the largely increased number of flat panel displays and especially liquid crystal displays (LCDs) being produced for home entertainment TV and mobile technologies. While a shortage of primary indium seems far on the horizon, nevertheless, recycling has become an important issue, as has the development of ITO-free electrode materials, especially for flexible liquid crystal devices. The main contenders for new electrode technologies are discussed with an emphasis placed on carbon-based materials for LCDs, including composite approaches. At present, these already fulfil the technical specifications demanded from ITO with respect to transmittance and sheet resistance, albeit not in relation to cost and large-scale production. Advantages and disadvantages of ITO-free technologies are discussed, with application examples given. An outlook into the future suggests no immediate transition to carbon-based electrodes in the area of LCDs, while this may change in the future once flexible displays and environmentally friendly smart window solutions or energy harvesting building coverings become available.

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Section: Single-wall and Multi-wall Carbon Nanotubesmentioning

confidence: 96%

“…The response is similar for the nanotube electrodes as compared to a commercial cell. (Reproduced by permission from [116]).…”

Section: Single-wall and Multi-wall Carbon Nanotubesmentioning

confidence: 99%

Section: Applications Of Carbon-based Ito-free Technologiesmentioning

confidence: 99%

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Carbon Allotropes as ITO Electrode Replacement Materials in Liquid Crystal Devices

Dierking

2020

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“…The major problems for the application of POSS are poor compatibility with LC media and weak interaction with LC molecules . Pristine POSS NPs highly aggregate themselves in the LC media and create macroscopic micron size domains resulting in severe light scatterings. , Addition of 1D nanomaterials to LC hosts in small quantities has shown betterment of the display parameters such as electro-optic switching time, contrast ratio, and threshold voltage as observed by various research groups. − Addition of various types of carbon nanotubes is widely studied and proven to show great potential as a doping material in LC for device applications. − However, VA with the addition of 1D nanomaterials is yet to be explored. Here, we present the alignment properties of host LC molecules with positive dielectric anisotropy by addition of zinc oxide nanorods capped with oleic acid (ZOR).…”

Section: Introductionmentioning

confidence: 99%

“… 30 − 33 Addition of various types of carbon nanotubes is widely studied and proven to show great potential as a doping material in LC for device applications. 34 − 36 However, VA with the addition of 1D nanomaterials is yet to be explored. Here, we present the alignment properties of host LC molecules with positive dielectric anisotropy by addition of zinc oxide nanorods capped with oleic acid (ZOR).…”

Section: Introductionmentioning

confidence: 99%

Zinc Oleate Nanorod-Induced Vertical Alignment of Nematic Liquid Crystal

2022

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Nanocomposite zinc oxide nanorods capped with oleic acid (ZOR) with positive dielectric anisotropy liquid crystal (LC) 4′-octyl-4biphenylcarbonitrile (8CB) filled in unaligned cells exhibit homeotropic alignment of host LC molecules. Further, systematic investigation of the textural, dielectric, and conductivity properties of nanocomposites filled in planar cells is performed with increasing concentration of nanorods. At a nanorod concentration ≤0.2 wt % in 8CB, the order parameter of nanocomposite samples is found to be increasing and ionic conductivity is found to be decreasing as compared to pure LC. Beyond 0.3 wt % concentration of nanorods in 8CB, vertical alignment (VA) of host LC is observed even in a planar aligned cell. The VA of LC molecules in ZOR nanocomposites is confirmed through attenuated total reflection−Fourier transform infrared absorption spectra studies.

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Nanoparticles-Induced Alignment of Nematic Liquid Crystals for Tunable Electro-Optical Devices

Kumar,

Singh

2024

Advances in Fabrication and Investigation of Nanomaterials for Industrial Applications

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Homeotropic liquid crystal device employing vertically aligned carbon nanotube arrays as the alignment agent

Cited by 13 publications

References 34 publications

Carbon Allotropes as ITO Electrode Replacement Materials in Liquid Crystal Devices

Carbon Allotropes as ITO Electrode Replacement Materials in Liquid Crystal Devices

Zinc Oleate Nanorod-Induced Vertical Alignment of Nematic Liquid Crystal

Nanoparticles-Induced Alignment of Nematic Liquid Crystals for Tunable Electro-Optical Devices

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