The relative permittivity of 1,2-dimethoxyethane and N,N-dimethylformamide mixtures from ?10 to 40�C

Goldoni, Gianni; Marcheselli, Luigi; Marchetti, Andrea; Tassi, Lorenzo; Tosi, Giuseppe

doi:10.1007/bf00650871

Cited by 15 publications

(2 citation statements)

References 14 publications

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“…We select some liquids with different permittivities and carried out numerical simulations in CST Microwave Studio. In particular, the air (ε r = 1), dodecane (ε r = 2), acetic acid (ε r = 6.15), heptanone (ε r = 11.2), ethanol (ε r = 24.5), and N,N-Dimethylformamide (ε r = 36.7) are considered [26][27][28][29][30]. The S21 curves are plotted in figure 4(a), showing that with the increase of the permittivity of the injected liquid, the resonance frequency constantly decreases in the range of 7.72 ∼ 8.13 GHz.…”

Section: Design Of the Mtm Sensormentioning

confidence: 99%

A metamaterial based microfluidic sensor for permittivity detection of liquid

Qiu¹,

Lei²,

Wang³

et al. 2022

J. Phys. D: Appl. Phys.

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The electromagnetic behavior of a microwave sensor has specific relationship with the physical properties of the materials to be detected, e.g., the concentration of solution and the permittivity of gas. The microwave sensor can detect changes of EM response in real time, and obtain the material properties with low sample consumption, high efficiency and dispersion characteristics. This work presents a microfluidic sensor using spiral resonators and plasmonic metamaterials with confined electromagnetic fields for intensive resonance. Two microfluidic chips with spiral channels engraved in polydimethylsiloxane (PDMS) are also adopted to enhance the interaction between the electromagnetic fields and the carried liquids at resonance frequencies. The permittivity of liquid samples can be detected through the shift of resonance frequency. A prototype of the sensor is fabricated and tested with several regular solutions and organic solvents, showing a good performance in terms of low liquid consumption (8 μL), good sensitivity (410 MHz frequency offset when εr changes from 1 to 36.7) and low cost

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Section: Design Of the Mtm Sensormentioning

confidence: 99%

A metamaterial based microfluidic sensor for permittivity detection of liquid

Qiu¹,

Lei²,

Wang³

et al. 2022

J. Phys. D: Appl. Phys.

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show abstract

“…Dielectric characterization has great potential in studying the H-bond interactions; dipolar alignments and stoichiometric ratio of stable adduct formation in mixed solvents. [1][2][3][4][5] In liquid binary mixtures there is a range of possible interactions between the constituents such as hydrogen bonding, molecular associations, dipole-dipole, and dipole-induced dipole interactions.…”

Section: Introductionmentioning

confidence: 99%

Interaction of Cyclohexane-Methyl Acetate Binary System through Dielectric Properties at Different Temperatures

Kamble¹,

Sudake²,

Patil³

et al. 2011

Journal of the Korean Chemical Society

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ABSTRACT. The present paper reports the study of binary mixtures and their properties over the entire range of composition at temperatures 288, 298, 308 and 318 K. Excess dielectric constant, excess molar volume, excess refractive index, molar refraction and excess molar refraction at different temperatures have been computed from the experimentally measured values of the aforesaid parameters and fitted to the Redlich-Kister equation. Excess dielectric constant, excess molar volume excess molar polarizations are negative whereas excess refractive indices are positive over entire mole fraction of methyl acetate for all temperatures. The results are discussed in light of intermolecular interactions occurring in the binary mixture. Estimated coefficients of the Redlich-Kister polynomials and the standard error along the coefficients are also reported.

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A Study of the Dielectric Behaviour and the Liquid Structure of a Ternary Solvent System

et al. 2004

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The static dielectric constant of the [DMF(1) + ME(2) + DME(3)] ternary mixtures was measured as a function of temperature (25 < or = t/degrees C < or = 80) and composition, over the whole mole fraction range 0 < or = chi,chi2,chi3 < or = 1. The experimental values were processed by an empirical equation accounting for the dependence epsilon = epsilon(T, phi(i)), where phi(t) is the volume fraction of the components. A comparison between calculated and experimental data shows that this fitting relationship can be effectively employed to predict epsilon values in correspondence to experimental data gaps. Starting from the experimental measurements, some derived quantities such as molar polarisation (P), and excess counterpart (PE) were obtained. Both the excess properties, epsilonE and PE, take values partly positive and partly negative under all experimental conditions. The values of the excess quantities are indicative of the presence of specific interactions among different components in the mixtures.

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The relative permittivity of 1,2-dimethoxyethane and N,N-dimethylformamide mixtures from ?10 to 40�C

Cited by 15 publications

References 14 publications

A metamaterial based microfluidic sensor for permittivity detection of liquid

A metamaterial based microfluidic sensor for permittivity detection of liquid

Interaction of Cyclohexane-Methyl Acetate Binary System through Dielectric Properties at Different Temperatures

A Study of the Dielectric Behaviour and the Liquid Structure of a Ternary Solvent System

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