Overlapping Dielectric Dispersions in Toluene

Santarelli, Vincent; Macdonald, J. A. B.; Pine, Charles

doi:10.1063/1.1841045

Cited by 22 publications

(4 citation statements)

References 23 publications

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“…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%

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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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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“…The data are collected from various sources as follows. TNB: dielectric 27 and viscosity; 28 37 and nuclear magnetic resonance; 38 EBZ: dielectric and viscosity; 23,39 ECH: dielectric 40,41 and viscosity. 13,33 The Maxwell relaxation time τ = η/G ∞ derived from viscosity data is adjusted via G ∞ so as to match the relaxation times from other techniques.…”

Section: B Activation Behavior Of Ultra-stable Glass Formers and Ethmentioning

confidence: 99%

Dynamics of glass-forming liquids. XV. Dynamical features of molecular liquids that form ultra-stable glasses by vapor deposition

Chen

Richert

2011

The Journal of Chemical Physics

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The dielectric relaxation behavior of ethylbenzene (EBZ) in its viscous regime is measured, and the glass transition temperature (T(g) = 116 K) as well as fragility (m = 98) are determined. While the T(g) of EBZ from this work is consistent with earlier results, the fragility is found much higher than what has been assumed previously. Literature data is supplemented by the present results on EBZ to compile the dynamic behavior of those glass formers that are known to form ultra-stable glasses by vapor deposition. These dynamics are contrasted with those of ethylcyclohexane, a glass former for which a comparable vapor deposition failed to produce an equally stable glassy state. In a graph that linearizes Vogel-Fulcher-Tammann behavior, i.e., the derivative of -logτ with respect to T/T(g) raised to the power of -1/2 versus T/T(g), all ultra-stable glass formers fall onto one master curve in a wide temperature range, while ethylcyclohexane deviates for T ≫ T(g). This result suggests that ultra-stable glass formers share common behavior regarding the dynamics of their supercooled liquid state if scaled to their respective T(g) values, and that fragility and related features are linked to the ability to form ultra-stable materials.

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“…The experimental dielectric data were obtained from ref. [60][61][62][63][64][65][66][67][68][69][70] Fig. 2 dielectric response spectra for the polar solvents have a large component for the low frequency region (r1000 cm À1 for water, r2-300 cm À1 for methanol and acetonitrile).…”

Section: Implication From Dielectric Dispersionmentioning

confidence: 99%