Faster response and lesser threshold voltage of strontium hardystonite (Sr-HT) nematic liquid crystal: Photoluminescence and optical study

Misra, Abhishek Kumar; Singh, Bhupendra Pratap; Chandraker, Siteshwari; Pandey, Kamal Kumar; Tripathi, Pankaj Kumar; Saluja, Jagjeet Kaur; Manohar, Rajiv

doi:10.1016/j.optmat.2019.04.066

Cited by 12 publications

(2 citation statements)

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“…The infrared absorption spectra of MWCNTs, DNA, pure 5CB, and MWCNT/5CB and DNA-MWCNT/5CB composites with the concentration of 0.0001 wt % have been analyzed by different spectral regions in Figure . Due to the small concentration of MWCNTs in the composites, the contribution from the nanotube vibrations to overall spectral shape is feeble, but some subtle changes can still be observed according to refs and .…”

Section: Resultsmentioning

confidence: 99%

“…In display applications, a variety of monomer liquid crystals are often blended to prepare mixed liquid crystals. And nowadays, nanoparticles − are often expected to be doped into the LCs to overcome some unfavorable factors such as low clear point, high driving voltage, and high viscosity and to enhance the birefringence characteristic, to achieve better display performance.…”

Section: Introductionmentioning

confidence: 99%

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Composite of DNA-Stabilized Multiwalled Carbon Nanotube and Nematic Liquid Crystal for Display Performance Optimization

Liu

Chang

et al. 2023

ACS Appl. Electron. Mater.

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We have prepared composites of a nematic liquid crystal (NLC) mixture to improve display performance by doping multiwalled carbon nanotubes (MWCNTs) and single-stranded-DNA-wrapped MWCNTs. Polarized optical microscopy images indicated the uniformity of the composite. Infrared absorption spectra showed there existed an interaction between MWCNTs and 4-pentyl-4′-cyanobiphenyl (5CB, a practical solvent-type monomer NLC) due to π−π stacking and charge transfer, indicating the anchoring of 5CB molecules on the MWCNT surface. The electro-optical property proved the incorporation of MWCNTs and DNA-wrapped MWCNTs reduced the threshold voltage and response time, thus following the changed splay elastic constant and rotational viscosity coefficient of LC, reflecting that DNA can improve the stability of MWCNTs in 5CB. Moreover, dielectric measurement showed the enhanced value to dielectric anisotropy and shift in relaxation frequency, including the changes of dielectric permittivity and loss, revealing the electrically "inertness" MWCNTs at high frequencies and the DNA-induced broadened frequency range of low dielectric loss. Then electrical conductivity tests further proved the cooperative orientation of MWCNTs with 5CB under the applied voltage and the contribution of MWCNTs' high conducting along the long axis. This study revealed that MWCNT doping could improve the physical properties of NLCs, and DNA wrapping could pave a promising way toward stabilized MWCNT/NLC composites for display performance optimization.

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Section: Resultsmentioning

confidence: 99%