Temperature Dependence of Relaxation Time of Water in NaCl Aqueous Solution by Low-Frequency Raman Spectroscopy

1996 ◽  
Vol 65 (8) ◽  
pp. 2690-2693 ◽  
Author(s):  
Kohji Mizoguchi ◽  
Yasunori Tominaga
Keyword(s):  
Aqueous Solution ◽  
Raman Spectroscopy ◽  
Relaxation Time ◽  
Temperature Dependence ◽  
Low Frequency

scholarly journals Temperature dependence of acoustic vibrations of CdSe and CdSe–CdS core–shell nanocrystals measured by low-frequency Raman spectroscopy

2016 ◽  
Vol 18 (41) ◽  
pp. 28797-28801 ◽  
Author(s):  
A. Jolene Mork ◽  
Elizabeth M. Y. Lee ◽  
William A. Tisdale
Keyword(s):  
Raman Spectroscopy ◽  
Low Temperature ◽  
Temperature Dependence ◽  
Low Frequency ◽  
Inhomogeneous Broadening ◽  
Core Shell ◽  
Acoustic Vibrations ◽  
Frequency Shifts ◽  
Higher Harmonic ◽  
Large Frequency

Low-temperature Raman spectroscopy reveals inhomogeneous broadening, surprisingly large frequency shifts, and the origin of higher harmonic peaks in core–shell nanocrystals.

Anomalous Temperature Dependence of Spin-lattice Relaxation Time of the 14N-NQR Line in NaNO2

1990 ◽  
Vol 45 (3-4) ◽  
pp. 523-526 ◽  
Author(s):  
M. Igarashi ◽  
K. Eto ◽  
Y. Saito ◽  
Y. Abe
Keyword(s):  
Aqueous Solution ◽  
Relaxation Time ◽  
Temperature Dependence ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Anomalous Temperature Dependence ◽  
Anomalous Temperature ◽  
Spin Lattice Relaxation Time ◽  
Spin Lattice

Abstract The temperature dependence of the 14N-NQR spin-lattice relaxation time T1 of a powder sample of NaNO2 prepared from saturated aqueous solution could be fitted by a monotonic curve. When this sample was annealed, two minima of the T1 -Tcurve appeared around 35 K and 77 K. The origin of this phenomenon is discussed.

Temperature Dependence of the Air/Water Interface Revealed by Polarization Sensitive Sum-Frequency Generation Spectroscopy

2018 ◽  
Author(s):  
Daniel R. Moberg ◽  
Shelby C. Straight ◽  
Francesco Paesani
Keyword(s):  
Temperature Dependence ◽  
Low Frequency ◽  
Potential Energy Function ◽  
Md Simulations ◽  
Sum Frequency Generation ◽  
Water Molecules ◽  
Water Interface ◽  
Sum Frequency ◽  
Air Water Interface ◽  
Frequency Generation

<div> <div> <div> <p>The temperature dependence of the vibrational sum-frequency generation (vSFG) spectra of the the air/water interface is investigated using many-body molecular dynamics (MB-MD) simulations performed with the MB-pol potential energy function. The total vSFG spectra calculated for different polarization combinations are then analyzed in terms of molecular auto-correlation and cross-correlation contributions. To provide molecular-level insights into interfacial hydrogen-bonding topologies, which give rise to specific spectroscopic features, the vSFG spectra are further investigated by separating contributions associated with water molecules donating 0, 1, or 2 hydrogen bonds to neighboring water molecules. This analysis suggests that the low frequency shoulder of the free OH peak which appears at ∼3600 cm−1 is primarily due to intermolecular couplings between both singly and doubly hydrogen-bonded molecules. </p> </div> </div> </div>

scholarly journals Quantitative and Qualitative Analysis of Some Inorganic Compounds by Raman Spectroscopy

1994 ◽  
Vol 48 (7) ◽  
pp. 875-883 ◽  
Author(s):  
Daniel R. Lombardi ◽  
Chao Wang ◽  
Bin Sun ◽  
Augustus W. Fountain ◽  
Thomas J. Vickers ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Raman Spectroscopy ◽  
Qualitative Analysis ◽  
Raman Spectra ◽  
Solid Phase ◽  
Inorganic Compounds ◽  
Core Material ◽  
Storage Tanks ◽  
Hanford Site ◽  
Sampling Probe

Raman spectra have been measured for a number of nitrates, nitrites, sulfates, ferrocyanides, and ferricyanides, both in the solid phase and in aqueous solution. Accurate locations of peak maxima are given. Limits of detection for some of the compounds are given for solutions and for solid mixtures in NaNO3. Preliminary measurements have been made on core material recovered from the storage tanks on the Hanford site in Richland, Washington. Representative spectra are presented, showing that it is possible to observe responses of individual components from measurements made directly on untreated cores, with the use of a fiberoptic sampling probe.

Investigating the dielectric properties and low-frequency relaxation process of TlGaSe2 crystals

2017 ◽  
Vol 31 (12) ◽  
pp. 1750134 ◽  
Author(s):  
Oktay Samadov ◽  
Oktay Alakbarov ◽  
Arzu Najafov ◽  
Samir Samadov ◽  
Nizami Mehdiyev ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Relaxation Time ◽  
Constant Electric Field ◽  
Low Frequency ◽  
Constant Field ◽  
Impedance Spectra ◽  
Ionic Contribution ◽  
Frequency Relaxation ◽  
Average Relaxation Time ◽  
Diagram Analysis

The dielectric and impedance spectra of TlGaSe2 crystals have been studied at temperatures in the 100–500 K range in the alternating current (AC [Formula: see text]1 V). It has been shown that the conductivity of TlGaSe2 crystals is mainly an ionic characteristic at temperatures above 400 K. The well-defined peak at the frequency dependence of the imaginary part of impedance [Formula: see text] is observed in the 215–500 K temperature range. In a constant field, there occurs a significant decrease in electrical conductivity [Formula: see text] in due course. The ionic contribution to conductivity (76% at [Formula: see text]) has been estimated from a kinetic change in electrical conductivity [Formula: see text] under the influence of a constant electric field. The diagram analysis in a complex plane [Formula: see text] has been conducted by applying the method of an equivalent circuit of the substation. It has been determined that the average relaxation time of the electric module of the sample is [Formula: see text].

Temperature dependence of the low-frequency surface impedance of metals near the extreme anomalous limit

1978 ◽  
Vol 17 (4) ◽  
pp. 1721-1737 ◽  
Author(s):  
A. Manz ◽  
J. Black ◽  
Kh. Pashaev ◽  
D. L. Mills
Keyword(s):  
Temperature Dependence ◽  
Surface Impedance ◽  
Low Frequency

Temperature dependence of low-frequency optical phonons in TlInS2

2015 ◽  
Vol 12 (6) ◽  
pp. 826-829 ◽  
Author(s):  
Raul Paucar ◽  
YongGu Shim ◽  
Kazuki Wakita ◽  
Oktay Alekperov ◽  
Nazim Mamedov
Keyword(s):  
Temperature Dependence ◽  
Low Frequency ◽  
Optical Phonons
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