Field-dependent electron mobility in methane–ethane liquid mixtures

1977 ◽  
Vol 55 (11) ◽  
pp. 1952-1960 ◽  
Author(s):  
Bappanadu N. Rao ◽  
Robert L. Bush ◽  
K. Funabashi
Keyword(s):  
Experimental Data ◽  
High Field ◽  
High Mobility ◽  
Liquid Mixtures ◽  
Liquid Hydrocarbons ◽  
Field Dependent ◽  
Field Mobility ◽  
Excess Electrons ◽  
Effects Of Temperature ◽  
Hopping Model

Some aspects of the mobility of excess electrons in liquid hydrocarbons are discussed. Certain salient features of the experimental data on high-field mobility in ethane–methane mixtures are explained in terms of a hopping model, in which disorder plays an important role. The disorder is compositional, like that in a binary alloy, and enters the model in the form of two distinct jump distances for hopping motion. It is shown that decreasing the coherence length for a quasi-free electron increases the binding energy of a localized electron and hence affects the activation energy and rate of hopping. The effects of temperature and impurity concentration for high-mobility liquids are shown to be consistent with a scattering model.

Electron mobility in nonpolar liquids: the effect of molecular structure, temperature, and electric field

1977 ◽  
Vol 55 (11) ◽  
pp. 2197-2210 ◽  
Author(s):  
Werner F. Schmidt
Keyword(s):  
Molecular Structure ◽  
Electric Field ◽  
High Mobility ◽  
Liquid Hydrocarbons ◽  
Limited Temperature ◽  
Excess Electrons ◽  
Liquid Methane ◽  
Nonpolar Liquids ◽  
Electron Models ◽  
Related Compounds

A survey is given on the mobility of excess electrons in liquid hydrocarbons and related compounds. It was found that the mobility is strongly influenced by the molecular structure of the liquid, by the temperature, and by the electric field strength. The mobility in hydrocarbons increases as the shape of the molecule approaches a sphere. The temperature coefficient is positive in most liquids over a limited temperature although exceptions have been observed in liquid methane. The field dependence of the mobility in high mobility liquids (>10 cm2V−1s−1) showed a decrease of the mobility at higher field strengths while in low mobility liquids (<1 cm2V−1s−1) it showed an increase. These results are discussed on the basis of the extended and the localized electron models. The predictions of these theories are compared with the experimental results and conclusions on the validity of the underlying assumptions are drawn.

Methods of Stabilization of Gas Condensates

2018 ◽  
Author(s):  
Ibukun Makinde
Keyword(s):  
Single Phase ◽  
Phase State ◽  
Liquid Mixtures ◽  
Gas Condensate ◽  
Liquid Hydrocarbons ◽  
Light Hydrocarbons ◽  
Natural Gases ◽  
Gas Condensates ◽  
Single Phase State

Gas condensates are liquid mixtures of high-boiling hydrocarbons of various structures, separated from natural gases during their production at gas condensate fields. When transporting gas through pipelines, the following gas quality conditions should be met:i.During transportation, gases should not cause corrosion of pipelines, fittings, instruments, etc.ii.The quality of the gas must ensure its transportation in a single-phase state i.e., liquid hydrocarbons, gas condensates and hydrates should not form in the pipelines.In order for gas condensates to meet the above-mentioned quality conditions during storage or transportation, they must be stabilized. Gas condensate stabilization is the process of “boiling off” light hydrocarbons from the condensate that would otherwise increase the vapor pressure when conditions are fluctuating.

scholarly journals Local Structuring of Diketopyrrolopyrrole (DPP)-based Oligomers from Molecular Dynamics Simulations

2021 ◽  
Author(s):  
Maryam Reisjalali ◽  
J. Javier Burgos-Marmol ◽  
Rex Manurung ◽  
Alessandro Troisi
Keyword(s):  
Experimental Data ◽  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
High Mobility ◽  
Semiconducting Polymers ◽  
Microscopic Structure ◽  
Dynamics Simulations

The microscopic structure of high mobility semiconducting polymers is known to be essential for their performance but it cannot be easily deduced from the available experimental data. A series of...

High-field mobility metal-gate/high-κ Ge n-MOSFETs with small equivalent-oxide-thickness

2011 ◽  
Vol 55 (1) ◽  
pp. 64-67 ◽  
Author(s):  
W.B. Chen ◽  
C.H. Cheng ◽  
C.W. Lin ◽  
P.C. Chen ◽  
Albert Chin
Keyword(s):  
High Field ◽  
Oxide Thickness ◽  
Equivalent Oxide Thickness ◽  
Metal Gate ◽  
Field Mobility

High Field Electron Drift in a-Si:H

1993 ◽  
Vol 297 ◽  
Author(s):  
Qing Gu ◽  
Eric A. Schiff ◽  
Jean Baptiste Chevrier ◽  
Bernard Equer
Keyword(s):  
Electric Fields ◽  
High Field ◽  
Drift Mobility ◽  
Time Range ◽  
Electron Drift ◽  
Parameter Change ◽  
Transient Photocurrent ◽  
Field Mobility ◽  
High Electric Fields ◽  
Electron Drift Mobility

We have measured the electron drift mobility in a-Si:H at high electric fields (E ≤ 3.6 x 105 V%cm). The a-Si:Hpin structure was prepared at Palaiseau, and incorporated a thickp+ layer to retard high field breakdown. The drift mobility was obtained from transient photocurrent measurements from 1 ns - 1 ms following a laser pulse. Mobility increases as large as a factor of 30 were observed; at 77 K the high field mobility de¬pended exponentially upon field (exp(E/Eu), where E u= 1.1 x 105 V%cm). The same field dependence was observed in the time range 10 ns – 1 μs, indicating that the dispersion parameter change with field was negligible. This latter result appears to exclude hopping in the exponential conduction bandtail as the fundamental transport mechanism in a-Si:H above 77 K; alternate models are briefly discussed.

Co-optimization of the metal gate/high-k stack to achieve high-field mobility >90% of SiO/sub 2/ universal mobility with an EOT=/spl sim/1 nm

2006 ◽  
Vol 27 (3) ◽  
pp. 185-187 ◽  
Author(s):  
Zhibo Zhang ◽  
S.C. Song ◽  
M.A. Quevedo-Lopez ◽  
Kisik Choi ◽  
P. Kirsch ◽  
...  
Keyword(s):  
High Field ◽  
Metal Gate ◽  
High K ◽  
Field Mobility

New insight into high-field mobility enhancement of nitrided-oxide N-MOSFET's based on noise measurement

1994 ◽  
Vol 41 (11) ◽  
pp. 2205-2209 ◽  
Author(s):  
Z.J. Ma ◽  
Z.H. Liu ◽  
Yiu Chung Cheng ◽  
P.K. Ko ◽  
Chenming Hu
Keyword(s):  
High Field ◽  
Noise Measurement ◽  
Field Mobility ◽  
Insight Into

Excess molar volumes and viscosities of binary mixtures of some polyethers with propylamine at 298.15 K

2002 ◽  
Vol 80 (5) ◽  
pp. 467-475 ◽  
Author(s):  
Amalendu Pal ◽  
Rakesh Kumar Bhardwaj
Keyword(s):  
Experimental Data ◽  
Viscous Flow ◽  
Binary Mixtures ◽  
Entire Range ◽  
Excess Volume ◽  
Excess Molar Volumes ◽  
Liquid Mixtures ◽  
Molar Volumes ◽  
Binary Liquid ◽  
Volume Viscosity

Excess molar volumes (VmE) and dynamic viscosities (η) have been measured as a function of composition for binary liquid mixtures of propylamine with 2,5-dioxahexane, 2,5,8-trioxanonane, 2,5,8,11-tetraoxadodecane, 3,6,9-trioxaundecane, and 5,8,11-trioxapentadecane at 298.15 K. The excess volumes are positive over the entire range of composition for the systems propylamine + 2,5-dioxahexane, and + 3,6,9-trioxaundecane, negative for the systems propylamine + 2,5,8,11-tetraoxadodecane, and + 5,8,11-trioxapentadecane, and change sign from positive to negative for the remaining system propylamine + 2,5,8-trioxanonane. From the experimental data, deviations in the viscosity (Δln η) and excess energies of activation for viscous flow (ΔG*E) have been derived. These values are positive for all mixtures with the exception of propylamine + 2,5-dioxahexane.Key words : excess volume, viscosity, binary mixtures.

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