Orientational and electro-optical properties of liquid crystal aligned with a directly spinnable carbon nanotube web

Lee, Hyojin; Lee, Jihoon; Huynh, Chi; Hawkins, Stephen C.; Musameh, Mustafa; Kim, Dae Hyung; Lee, Seung Hee; Choi, Jonghyun

doi:10.1080/02678292.2014.986233

Cited by 5 publications

(7 citation statements)

References 16 publications

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“…13 ), showing CNT arrays can successfully control the orientation of LC molecules and at the same time also act as a conductive layer. 32,114 This can also be seen from the literature, 110 where CNT arrays can function both as the alignment layer and electrode, thus reducing the production cost.…”

Section: Liquid-crystalline Applications Of Cntsmentioning

confidence: 74%

“… 109,110 Such CNT arrays can show good modulation of the transmittance by the electric field and less residual direct current (DC) property. 110 In addition, the electrodes of horizontal aligned nanotubes will further reduce the path lengths and improve the carrier mobility. 32,111,112 Also they can be used as the heating electrode which will extend the working temperature range of the LCDs.…”

Section: Liquid-crystalline Applications Of Cntsmentioning

confidence: 99%

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Liquid crystallinity of carbon nanotubes

et al. 2018

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Section: Liquid-crystalline Applications Of Cntsmentioning

confidence: 74%

Section: Liquid-crystalline Applications Of Cntsmentioning

confidence: 99%

Liquid crystallinity of carbon nanotubes

et al. 2018

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“…Later, Lee et al rubbed the aligned CNT film on glass drawn from an aligned MWCNT (diameter = 10 nm; length = 0.4 mm) array in the same manner as the conventional rubbing of the polymeric materials. 454 The CNT film became more uniformly oriented to the rubbing direction, although the majority of the CNTs were aligned to the drawing direction before rubbing. Unfortunately, the optical and electrical properties of the films were not published in their research.…”

Section: Liquid Crystal Displaysmentioning

confidence: 99%

mentioning

confidence: 99%

Recent Development of Carbon Nanotube Transparent Conductive Films

2016

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Transparent conducting films (TCFs) are a critical component in many personal electronic devices. Transparent and conductive doped metal oxides are widely used in industry due to their excellent optoelectronic properties as well as the mature understanding of their production and handling. However, they are not compatible with future flexible electronics developments where large-scale production will likely involve roll-to-roll manufacturing. Recent studies have shown that carbon nanotubes provide unique chemical, physical, and optoelectronic properties, making them an important alternative to doped metal oxides. This Review provides a comprehensive analysis of carbon nanotube transparent conductive films covering detailed fabrication methods including patterning of the films, chemical doping effects, and hybridization with other materials. There is a focus on optoelectronic properties of the films and potential in applications such as photovoltaics, touch panels, liquid crystal displays, and organic light-emitting diodes in conjunction with a critical analysis of both the merits and shortcomings of carbon nanotube transparent conductive films.

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“…Compared to the traditional ITO electrodes, which are suffering from difficulties such as the brittleness of ITO, the rising cost of indium, and the high vacuum and temperature processing during the production, CNT electrodes have great advantages in terms of their flexibility, low cost, safe fabrication process and special conductivity anisotropy, which make them a good substitute for ITO in the LCD industries [360,361]. CNT films can also act as alignment layers to orient LC molecules via the CNT substrates due to the orientational structure and the π-π interaction between them [212,[362][363][364] (Figure 14e,f). Apart from that, CNTs also show anisotropic optical responses due to the anisotropy and the graphite π electrons.…”

Section: Lc-aided-assembly and Self-assembly Of Nanomaterialsmentioning

confidence: 99%

Perspectives in Liquid-Crystal-Aided Nanotechnology and Nanoscience

2019

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The research field of liquid crystals and their applications is recently changing from being largely focused on display applications and optical shutter elements in various fields, to quite novel and diverse applications in the area of nanotechnology and nanoscience. Functional nanoparticles have recently been used to a significant extent to modify the physical properties of liquid crystals by the addition of ferroelectric and magnetic particles of different shapes, such as arbitrary and spherical, rods, wires and discs. Also, particles influencing optical properties are increasingly popular, such as quantum dots, plasmonic, semiconductors and metamaterials. The self-organization of liquid crystals is exploited to order templates and orient nanoparticles. Similarly, nanoparticles such as rods, nanotubes and graphene oxide are shown to form lyotropic liquid crystal phases in the presence of isotropic host solvents. These effects lead to a wealth of novel applications, many of which will be reviewed in this publication. the observation of chirality from achiral molecules, resulting from sterically induced packing of the bent-core mesogens [10], such as ferroelectricity or the formation of helical superstructures in the B7 phase [14]. Thermotropic LCs are commonly constituted by single organic entities or mixtures thereof, which exhibit various mesophases at different temperatures or pressures [15], illustrated in Figure 1b. As the temperature rises, a typical thermotropic LC passes through higher ordered phases, also called soft crystals, the hexatic smectic phases with positional order as well as bond orientational order, through the fluid smectic phases (SmC and SmA), which exhibit both positional and orientational order, and finally to the nematic phase (N) with purely orientational order, into the isotropic phase. The number of different phases observed depends on the chemical composition, symmetry and order of the LC molecules. About 25 different thermotropic phases are known to date, and they are still increasing in number. Appl. Sci. 2019, 9, x FOR PEER REVIEW 2 of 47 unique effects of the observation of chirality from achiral molecules, resulting from sterically induced packing of the bent-core mesogens [10], such as ferroelectricity or the formation of helical superstructures in the B7 phase [14]. Thermotropic LCs are commonly constituted by single organic entities or mixtures thereof, which exhibit various mesophases at different temperatures or pressures [15], illustrated in Figure 1b. As the temperature rises, a typical thermotropic LC passes through higher ordered phases, also called soft crystals, the hexatic smectic phases with positional order as well as bond orientational order, through the fluid smectic phases (SmC and SmA), which exhibit both positional and orientational order, and finally to the nematic phase (N) with purely orientational order, into the isotropic phase. The number of different phases observed depends on the chemical composition, symmetry and order of the LC molecules. About...

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Orientational and electro-optical properties of liquid crystal aligned with a directly spinnable carbon nanotube web

Cited by 5 publications

References 16 publications

Liquid crystallinity of carbon nanotubes

Liquid crystallinity of carbon nanotubes

Recent Development of Carbon Nanotube Transparent Conductive Films

Perspectives in Liquid-Crystal-Aided Nanotechnology and Nanoscience

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