Optical characterization of inorganic nanoparticles doped in polymer dispersed liquid crystal

Mishra, Krishnakant K.; Dubey, S. K.; Mani, Santosh A.

doi:10.1080/15421406.2017.1289603

Cited by 22 publications

(9 citation statements)

References 2 publications

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“…The doping of ferroelectric NPs created spontaneous polarization which further improved the E-O properties [82,83]. In India, Mishra et.al [76] of Mumbai University, reported the fabrication of PDLC films by the SIPS method and embedded CuO, ZnO and Zn, NPs. A change in the structural and optical properties in the films was observed due to the gradient in the phase transition temperature confirmed by various characterization techniques such as Fabry Perot spectroscopic studies, optical polarized microscopy, differential scanning calorimetry, and Abbe refractometry using DSR Lamda.…”

Section: Preparation Of Nanoparticles Doped Pdlc Composite Filmmentioning

confidence: 99%

“…Other inorganic NPs such as ZnO, MgO, CuO, BTO, BaTiO 3 , Fe 3 O 4 , TiO 2 [ 76 , 77 , 78 , 79 , 80 , 81 , 82 ] were doped into PDLCs and a decrease in driving voltage was observed. It was found that these particles tended to impact the dielectric constant of the medium or created local field effects which consequently lowered the driving voltage.…”

Section: Preparation Of Nanoparticles Doped Pdlc Composite Filmmentioning

confidence: 99%

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Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

et al. 2020

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Polymer dispersed liquid crystals (PDLCs) have kindled a spark of interest because of their unique characteristic of electrically controlled switching. However, some issues including high operating voltage, low contrast ratio and poor mechanical properties are hindering their practical applications. To overcome these drawbacks, some measures were taken such as molecular structure optimization of the monomers and liquid crystals, modification of PDLC and doping of nanoparticles and dyes. This review aims at detailing the recent advances in the process, preparations and applications of PDLCs over the past six years.

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Section: Preparation Of Nanoparticles Doped Pdlc Composite Filmmentioning

confidence: 99%

Section: Preparation Of Nanoparticles Doped Pdlc Composite Filmmentioning

confidence: 99%

Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

et al. 2020

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“…There has been an amount of work to improve the electro‐optical properties of the PDLC film by doping. For example, researchers dope nanoparticles (NPs) like indium tin oxide (ITO) NPs, silica NPs, or inorganic NPs to original all‐organic system to enhance the optical, thermal and mechanical stability of the polymer matrix and interaction with the LC and the change of permittivity of the LC droplets and the polymer matrix induced by the introduction of the NPs is also investigated 20–24 . Besides, the dye is also used to dope in the PDLC system to regulate many parameters of LC like refractive index, orientational order and dielectric constant due to the strong microscopic mutual interaction among the dye and LC molecules 25–28 .…”

Section: Introductionmentioning

confidence: 99%

“…For example, researchers dope nanoparticles (NPs) like indium tin oxide (ITO) NPs, silica NPs, or inorganic NPs to original all-organic system to enhance the optical, thermal and mechanical stability of the polymer matrix and interaction with the LC and the change of permittivity of the LC droplets and the polymer matrix induced by the introduction of the NPs is also investigated. [20][21][22][23][24] Besides, the dye is also used to dope in the PDLC system to regulate many parameters of LC like refractive index, orientational order and dielectric constant due to the strong microscopic mutual interaction among the dye and LC molecules. [25][26][27][28] Moreover, carbon nanotubes (CNTs) are also successfully applied as dopants in PDLCs based on the anisotropic mechanical and electric properties resulted from the alignment of CNTs.…”

Section: Introductionmentioning

confidence: 99%

Effects of terpene alcohol dopant on the morphology and electro‐optical properties of polymer‐dispersed liquid‐crystal composite films

Huang

Ren

et al. 2021

Polymers for Advanced Techs

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Terpenes are a large class of hydrocarbon compounds derived from isoprene, which can be produced by plants or emitted by insects. Terpene alcohols contain double bonds that may affect the addition polymerization, and hydroxyl groups that can promote the network crosslinking density during the formation of polymer-dispersed liquid-crystal (PDLC) composite films. In this work, effects of different terpene alcohol dopant on the morphology and electro-optical properties of PDLC films are systematically investigated. It is found that the appropriate dopant amount of geraniol (GOL) has the superior effect to improve the electro-optical performance. The optimum addition amount is at 3 wt%, where the transmittance vs. voltage curve gets steeper, the driving voltage of PDLC film reduces from 74 to 32 V and meanwhile the contrast ratio maintains at a relatively high level (123). Thus, this work not only broadens the application scope of the natural spices but also provides a new strategy to reduce the driving voltage of PDLC films for practical applications.

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“…Zinc oxide nanostructures are nontoxic, biologically compatible [14,15], have faster electron transfer rates [16] and thus find good application in the field of biosensor [17]. In nanoscale dimensions, selenium has shown reduced toxicity which can be applied in many applications in biological and medical fields [18][19][20][21] as well as in dye degradation.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Selenium Doped Zinc Oxide Nanoparticles using Mangifera indica Leaf Extract and Its Photodegradation and Antibacterial Activities

Dhivya¹,

Yadav²,

Powrnika³

2019

JNST

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Biomolecule-mediated nanoparticle synthesis has recently gained the attention of researchers due to its eco-friendly and non-toxic nature. Herein, we aimed to describe the rapid green synthesis of selenium doped zinc oxide nanoparticles by using aqueous leaf extract of Mangifera indica to overcome the chemical synthesis. The reduction of precursors used for nanoparticles is activated by natural reducing agents present in plant extract which eliminates the neurotoxic reducing agents present in chemicals. The nanoparticles were assessed for their stability by varying parameters like pH, temperature, time and concentration. The highly stable nanoparticles were characterized using UV-visible spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy and field emission scanning electron microscopy with EDAX. Further the synthesized nanoparticles are investigated for photodegradation and antibacterial activity and found to be more effective.

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Optical characterization of inorganic nanoparticles doped in polymer dispersed liquid crystal

Cited by 22 publications

References 2 publications

Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

Effects of terpene alcohol dopant on the morphology and electro‐optical properties of polymer‐dispersed liquid‐crystal composite films

Green Synthesis of Selenium Doped Zinc Oxide Nanoparticles using Mangifera indica Leaf Extract and Its Photodegradation and Antibacterial Activities

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