Dielectric spectra of some common solvents in the microwave region. Water and lower alcohols

Barthel, J.; Bachhuber, K.; Buchner, Richard; Hetzenauer, H.

doi:10.1016/0009-2614(90)87204-5

Cited by 486 publications

(434 citation statements)

References 20 publications

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“…The permittivity of water was estimated to be 82 -j4.8 using this method. This is comparable to the value of 78 -j4.5 from [38]. VI.…”

Section: Resultssupporting

confidence: 84%

“…Rings a, b and c were used to measure the dielectric properties of several solvents of known permittivity, where permittivity values were obtained at the relevant frequencies from the Debye-type responses given in [7], [38], [39]. The changes in center frequency and inverse quality factor of rings a, b and c are plotted with respect to permittivity in Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Improved Split-Ring Resonator for Microfluidic Sensing

Rowe

al-Malki

Abduljabar

et al. 2014

IEEE Trans. Microwave Theory Techn.

111

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Abstract-We present a method of making low loss split-ring resonators for microfluidic sensing at microwave frequencies using silver coated copper wire. We show that a simple geometric modification and the use of square cross-section wire give greater electric field confinement in the capacitive region of the resonant sensor. We use a combination of theoretical analysis, finite element simulations and empirical measurements to demonstrate the subsequent increases in the sensitivity of these split ring resonators for complex permittivity measurements of some common solvents.

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“…The permittivity of water was estimated to be 82 -j4.8 using this method. This is comparable to the value of 78 -j4.5 from [38]. VI.…”

Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Improved Split-Ring Resonator for Microfluidic Sensing

Rowe

al-Malki

Abduljabar

et al. 2014

IEEE Trans. Microwave Theory Techn.

111

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“…In the case of alcohols, only the dielectric properties of liquid methanol [2][3][4] and methanol-water mixtures 5 have been analyzed by computer simulation. Many experimental studies of both static and dynamic dielectric properties of hydrogen bonded liquids have been carried out, but in the case of ethanol, the latter are restricted to the microwave region of the spectra 6 and to the infrared region 7 up to about 34 cm Ϫ1 . To achieve a better understanding of the dielectric properties of monohydric alcohols, we show in this article the results obtained for liquid ethanol by means of MD simulations.…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of liquid ethanol. A computer simulation study

Saiz

Guàrdia

Padró

2000

The Journal of Chemical Physics

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Static and dynamic dielectric properties of liquid ethanol have been studied as a function of the wave-vector number by computer simulation. Molecular dynamics simulations at room temperature have been performed using the optimized potentials for liquid simulations ͑OPLS͒ potential model proposed by Jorgensen ͓J. Phys. Chem. 90, 1276 ͑1986͔͒. The time dependent correlation functions of the longitudinal and transverse components of the dipole density as well as the individual and total dipole moment autocorrelation functions have been calculated. The infrared spectra and the dielectric relaxation of the liquid have been also analyzed. Results have been compared with the available experimental data. Special attention has been dedicated to investigate the molecular origin of the different analyzed properties.

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“…Using dielectric spectroscopy, it has been shown that, in liquid water, dipole rotation translates into a so called α-relaxation process which clearly exhibits simple Debye behaviour in the microwave region over a wide range of temperatures [8][9][10][11], despite the presence of hydrogen bonding. The effect of adding different solutes on the strength of this hydrogen bonding network has also been analysed for various aqueous solutions [12].…”

mentioning

confidence: 99%

Molecular dynamics simulations for the prediction of the dielectric spectra of alcohols, glycols and monoethanolamine

Cardona

Fartaria

Sweatman

et al. 2015

Molecular Simulation

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This version is available at https://strathprints.strath.ac.uk/54062/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the The response of molecular systems to electromagnetic radiation in the microwave region (0.3-300 GHz) has been principally studied experimentally, using broadband dielectric spectroscopy. However, relaxation times corresponding to reorganisation of molecular dipoles due to their interaction with electromagnetic radiation at microwave frequencies are within the scope of modern molecular simulations. In this work, fluctuations of the total dipole moment of a molecular system, obtained through molecular dynamics simulations, are used to determine the dielectric spectra of water, a series of alcohols and glycols, and monoethanolamine. Although the force fields employed in this study have principally been developed to describe thermodynamic properties, most them give fairly good predictions of this dynamical property for these systems. However, the inaccuracy of some models and the long simulation times required for the accurate estimation of the static dielectric constant can sometimes be problematic. We show that the use of the experimental value for the static dielectric constant in the calculations, instead of the one predicted by the different models, yields satisfactory results for the dielectric spectra, and hence the heat absorbed from microwaves, avoiding the need for extraordinarily long simulations or re-calibration of molecular models.

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Dielectric spectra of some common solvents in the microwave region. Water and lower alcohols

Cited by 486 publications

References 20 publications

Improved Split-Ring Resonator for Microfluidic Sensing

Improved Split-Ring Resonator for Microfluidic Sensing

Dielectric properties of liquid ethanol. A computer simulation study

Molecular dynamics simulations for the prediction of the dielectric spectra of alcohols, glycols and monoethanolamine

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