The Effect of Pressure on the Critical Temperature of Four-Component Microemulsioms

1989 ◽  
Vol 177 ◽  
Author(s):  
Jacques Goyette ◽  
T. K. Bose ◽  
J. Thoen ◽  
J. R. Lalanne
Keyword(s):  
Refractive Index ◽  
Critical Temperature ◽  
Correlation Length ◽  
Critical Points ◽  
Pressure Dependence ◽  
Sodium Dodecylsulfate ◽  
Nonlinear Behavior ◽  
Negative Sign ◽  
Effect Of Pressure ◽  
Line Ending

ABSTRACTWe present results for the pressure dependence of the critical temperature (dTc/dP) for several microemulsions of n-dodecane, water, n-pentanol and sodium dodecylsulfate with critical points along a criticial line ending at a critical end point (CEP). The variation of dTc/dP as a function of the water to surfactant ratio X shows a nonlinear behavior, with large changes near the CEP, and similar to the X dependence previously observed for the correlation length amplitude ξo. From the negative sign of dTc/dP we also conclude that a possible anomaly in the density must be opposite to the anomaly recently reported for the refractive index.

Pressure dependence of the refractive index in wurtzite and rocksalt indium nitride

2014 ◽  
Vol 105 (23) ◽  
pp. 232111 ◽  
Author(s):  
R. Oliva ◽  
A. Segura ◽  
J. Ibáñez ◽  
T. Yamaguchi ◽  
Y. Nanishi ◽  
...  
Keyword(s):  
Refractive Index ◽  
Pressure Dependence ◽  
Indium Nitride

The influence of oxygen pressure on lead oxidation kinetics

1980 ◽  
Vol 33 (3) ◽  
pp. 471 ◽  
Author(s):  
GA Hope
Keyword(s):  
Refractive Index ◽  
Pressure Dependence ◽  
Oxidation Kinetics ◽  
Oxidation Rate ◽  
Abrupt Change ◽  
Oxide Interface ◽  
Positive Dependence ◽  
Different Temperatures ◽  
Lead Films ◽  
Lead Oxidation

The dependence of the oxidation rate of lead films on the pressure of oxygen was investigated by ellipsometric and resistance techniques for oxygen pressures between 200 Pa and 100 kPa and in the temperature range 323-423 K. Measurements of the pressure dependence were obtained by studying the change in oxidation rate following an abrupt change in pressure. The results of all experiments indicated a small positive dependence, though significant variations in the values were observed both with extent of oxidation, and between experiments conducted at different temperatures. During the first few minutes of the reaction an unusual trend was noted in the observed kinetics which could be interpreted as being due to absorption of oxygen, by the metal close to the metal-oxide interface, resulting in changes to the metal conductivity and the refractive index, determined by ellipsometry, of the lead substrate.

Packet Switching Start-Stop Bits Generation Based on Bifurcation Behavior of Light in a Micro Ring Resonator

2008 ◽  
Vol 55-57 ◽  
pp. 505-508 ◽  
Author(s):  
N. Pornsuwancharoen ◽  
J. Kumbun ◽  
P. Preecha Yupapin
Keyword(s):  
Refractive Index ◽  
Coupling Coefficient ◽  
Packet Switching ◽  
Ring Resonator ◽  
Nonlinear Behavior ◽  
The Other ◽  
Optical Packet Switching ◽  
Ring Radius ◽  
Simulation Results ◽  
Bifurcation Behavior

his paper proposes the interesting nonlinear behavior of light known as bifurcation, where the use of such behavior in a micro ring resonator to form the secure digital codes for optical packet switching application is demonstrated. A new concept of the stop-start bits in an optical packet switching protocol is formed by using the bifurcation codes. The bifurcation is introduced when light is input into a nonlinear micro ring device, where the refractive index of an InGaAsP/InP is one of device parameters. The other parameters of the device are coupling coefficient (K) and the ring radius (R), where the ring radii used are ranged from 5-10 microns. Simulation results obtained have shown that the packet switching data can be secured by using the generated start-stop bits as the secured codes.

Effect of Pressure on the Rates of Reaction of Radiolysis Intermediates in Liquid n-Hexane

1971 ◽  
Vol 49 (16) ◽  
pp. 2651-2656 ◽  
Author(s):  
Kamal N. Jha ◽  
Gordon R. Freeman
Keyword(s):  
Carbon Tetrachloride ◽  
Hydrogen Atom ◽  
Pressure Dependence ◽  
Diffusion Coefficients ◽  
Effect Of Pressure ◽  
Scavenging Efficiency ◽  
Kinetics Of ◽  
Positive Ion

The yield of hydrogen from pure hexane, G(H2) = 5.3 ± 0.2 was independent of pressure in the range 1 bar to 4.6 kbars. The G values of H2, HD, and D2 obtained from 11 mol% C6D14 in C6H14 were independent of pressure and were respectively, 4.85, 0.34, and 0.11. The electron and hydrogen atom scavenging efficiencies of carbon tetrachloride and hexadiene-1,3, and the hydrogen atom scavenging efficiency of hexene-1 were independent of pressure. The positive ion scavenging efficiencies of benzene and aniline increased with increasing pressure. The volume of activation for the hydrogen atom reaction with n-hexane is essentially the same as that for the reaction with hexene-1. The pressure dependence of the charge scavenging reactions has been interpreted in terms of the kinetics of spur processes. The treatment is consistent with the fact that the efficiency of the electron scavenging reactions is independent of pressure. The increased efficiency of positive ion reaction under pressure implies that the ratio of the diffusion coefficients of the radiolytic positive ion and electron, D+/D−, increases with increasing pressure.

Pressure dependence of the refractive index in InSe

2000 ◽  
Vol 15 (8) ◽  
pp. 806-812 ◽  
Author(s):  
F J Manjón ◽  
Y van der Vijver ◽  
A Segura ◽  
V Muñoz
Keyword(s):  
Refractive Index ◽  
Pressure Dependence

The dependence of the critical temperature on pressure

2020 ◽  
Vol 34 (29) ◽  
pp. 2050276
Author(s):  
Thaipanya Chanpoom
Keyword(s):  
Experimental Data ◽  
Critical Temperature ◽  
Intermetallic Compounds ◽  
Analytic Form ◽  
Exact Equation ◽  
Effect Of Pressure ◽  
Iron Chalcogenides

The aim of this research is to study the critical temperature depending on the pressure of one-band superconductor. We derive the exact equation of the critical temperature [Formula: see text] by using the BCS-like model. The effect of pressure and pseudogap on critical temperature has been investigated. The analytic form and the approximation of the critical temperature are shown. First, we consider the effect of pressure on the critical temperature and find that the critical temperature increased as pressure is increased which fits well with the experimental data of Tl-based and Bi-based superconductors. Second, the effect of the pseudogap on the critical temperature is considered. We found that the critical temperature is decreased as pressure increased which agrees to the data of [Formula: see text], the iron chalcogenides [Formula: see text], intermetallic compounds [Formula: see text] and [Formula: see text] superconductors.

Refractive index of GaP and its pressure dependence

1985 ◽  
Vol 32 (10) ◽  
pp. 6614-6619 ◽  
Author(s):  
K. Strössner ◽  
S. Ves ◽  
M. Cardona
Keyword(s):  
Refractive Index ◽  
Pressure Dependence
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