Thermodynamic and acoustical study of zinc oxide-nematic liquid crystals mixtures

Khushboo, .; Devi, Aarti; Malik, Praveen; Kumar, Harsh

doi:10.1016/j.molliq.2015.11.025

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…The acoustic impedance decreases because the Zigzag movement of the solvent increases with the rise in the heat, and the solvent molecule interacts with nanoparticles, which creates a gap between the molecules, which helps the ultrasonic waves to pass through the liquid easily. [36][37]. Figure 13 shows the attenuation of the ultrasonic wave inside the rGO-NMP nanosuspension.…”

Section: Rafas-2021mentioning

confidence: 99%

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Ultrasonic and thermodynamic investigation of reduced graphene oxide-n methyl-2-pyrrolidone nanosuspension

Jain

2022

J. Phys.: Conf. Ser.

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Reduced Graphene Oxide (rGO) reveals several remarkable properties resembling excessive electron mobility, superb thermal conductivity, and very strong material, etc. All these properties make up the rGO an outstanding material. GO was made in this research with the support of Hummer’s method and additional reduction is done with the help of Hydrazine Monohydrate. This prepared rGO was utilized to produce a nanosuspension along with N-Methyl-2-Pyrrolidone (NMP). NMP is an admirable solvent which widely utilized in production to dissipate many polymers. Additional use of the NMP is in the paint manufacturing; pharmacy productions which uses NMP in both oral and transdermic delivery methods. In this report, we use NMP as a foundation fluid for the suspension of rGO nanoparticles with the support of a superb ultrasonication method. DLS verifies the stability of the nanosuspension. In this paper prepared nanosuspension is used to study the various thermal and acoustical properties. Velocity, density and viscosity of the nanosuspension has been calculated experimentally and experimental values used to calculate the derived parameters like adiabatic compressibility, attenuation, relaxation time, Bulk modulus, etc.

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Section: Rafas-2021mentioning

confidence: 99%

“…It shows the interaction between particle and solvent molecules increases. The increase in the intermolecular length with the rise in the heat is because the zigzag movement of the solvent molecules rises, and this movement increases the solute and solvent molecule interaction [36][37].…”

Section: Rafas-2021mentioning

confidence: 99%

Ultrasonic and thermodynamic investigation of reduced graphene oxide-n methyl-2-pyrrolidone nanosuspension

Jain

2022

J. Phys.: Conf. Ser.

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“…Ultrasonic waves propagate through the liquid crystal with different velocities at different temperatures and for different concentrations of liquid crystal. The study of ultrasonic velocities and their influence on molecular structure were carried out by several researchers [4,5]. Gabrielli and Verdini [6] were the first to investigate ultrasonic velocity and absorption in p-azoxyanisole, and reported abrupt variation of these acoustical parameters at the isotropic-nematic phase transition.…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature and Concentration on the Physical Properties of Cholesteryl Pelargonate Near Transition Temperatures

Gajghate¹,

Kanwar²

2021

J. Sci. Res.

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Thermodynamic and acoustical study of cholesteric liquid crystal (CLC) was carried out near phase transition temperatures using an ultrasonic interferometer. The study of ultrasonic waves and related thermo-acoustical parameters provides information in understanding the nature of molecular interactions associated with liquid crystals. A statistical mechanical approach is used to calculate the viscosity of samples. The characteristic textures and phase transition temperatures are obtained with Polarizing Microscopy (POM). Fabry Perot scattering studies (FPSS) are used to ascertain the phase transition temperatures of CLC. The thermo-acoustical parameters have been calculated using experimental data with well-known formulae. The acoustical parameters show variation with temperature as well as with concentration of CLC. Anomalous behavior of these parameters is noticed at the clearing temperature of CLC. The variation of the parameters is explained in terms of solute-solvent molecular interactions in the solution. The molecular behavior, structural changes, and intermolecular interactions between CLC and solvent are discussed in detail.

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Impact of Dispersion of Nonmesogenic Materials in Liquid Crystals

Singh

2024

Handbook of Liquid Crystals—Volume II

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Thermodynamic and acoustical study of zinc oxide-nematic liquid crystals mixtures

Cited by 8 publications

References 15 publications

Ultrasonic and thermodynamic investigation of reduced graphene oxide-n methyl-2-pyrrolidone nanosuspension

Ultrasonic and thermodynamic investigation of reduced graphene oxide-n methyl-2-pyrrolidone nanosuspension

Effect of Temperature and Concentration on the Physical Properties of Cholesteryl Pelargonate Near Transition Temperatures

Impact of Dispersion of Nonmesogenic Materials in Liquid Crystals

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