Tracer-diffusion in Liquids. V. Self-diffusion Isoelectric Glycine in Aqueous Glycine Solutions1

1953 ◽  
Vol 75 (11) ◽  
pp. 2777-2778 ◽  
Author(s):  
Jui H. Wang
Keyword(s):  
Tracer Diffusion ◽  
Self Diffusion ◽  
Diffusion In Liquids

Self-diffusion of Ag+ and Na+ in molten Ca(NO3)2-KNO3

1972 ◽  
Vol 25 (8) ◽  
pp. 1613 ◽  
Author(s):  
BJ Welch ◽  
CA Angell
Keyword(s):  
Electrical Conductance ◽  
Ionic Species ◽  
Tracer Diffusion ◽  
Dilute Solution ◽  
Self Diffusion ◽  
Capillary Method ◽  
Arrhenius Temperature Dependence ◽  
Radio Tracer ◽  
Tracer Diffusion Coefficients ◽  
Arrhenius Temperature

In order to explore the behaviour of diffusing ionic species in a molten salt in which non-Arrhenius behaviour of other transport properties is established, the diffusivities in dilute solution of Ag+ and Na+ in 38.1 mol% Ca(NO3)2+ 61.9 mol% KNO3 have been measured. For both ions limited radio-tracer diffusion coefficients, determined using a diffusion-out-of-capillary method, are reported. D(Ag+) has also been measured by chronopotentiometry, by which means the range and reliability of the measurements were considerably extended. Chronopotentiometric and tracer data agree within expected errors of measurement. Both ionic diffusivities show a non-Arrhenius temperature dependence which is indistinguishable in magnitude from that of the electrical conductance of the solvent melt.

A theory for self-diffusion in liquids

1999 ◽  
Vol 110 (6) ◽  
pp. 3009-3022 ◽  
Author(s):  
Maxim Vergeles ◽  
Grzegorz Szamel
Keyword(s):  
Self Diffusion ◽  
Diffusion In Liquids

Lithium tracer diffusion in near stoichiometric LiNi0.5Mn1.5O4 cathode material for lithium-ion batteries

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Daniel Uxa ◽  
Harald Schmidt
Keyword(s):  
Cathode Material ◽  
Secondary Ion Mass Spectrometry ◽  
Lithium Ion ◽  
Tracer Diffusion ◽  
Side Reactions ◽  
Battery Materials ◽  
Self Diffusion ◽  
Thermally Activated ◽  
Average Grain Size ◽  
And Migration

Abstract The compound LiNi0.5Mn1.5O4 is used as novel cathode material for Li-ion batteries and represents a variant to replace conventional LiMn2O4. For a further improvement of battery materials it is necessary to understand kinetic processes at and in electrodes and the underlying diffusion of lithium that directly influences charging/discharging times, maximum capacities, and possible side reactions. In the present study Li tracer self-diffusion is investigated in polycrystalline sintered bulk samples of near stoichiometric LiNi0.5Mn1.5O4 with an average grain size of about 50–70 nm in the temperature range between 250 and 600 °C. For analysis, stable 6Li tracers are used in combination with secondary ion mass spectrometry (SIMS). The tracer diffusivities can be described by the Arrhenius law with an activation enthalpy of (0.97 ± 0.05) eV, which is interpreted as the sum of the formation and migration energy of a thermally activated Li vacancy.

Self-Diffusion in Liquids. II. Comparison between Mutual and Self-Diffusion Coefficients

1959 ◽  
Vol 63 (12) ◽  
pp. 2059-2061 ◽  
Author(s):  
A. P. Hardt ◽  
D. K. Anderson ◽  
R. Rathbun ◽  
B. W. Mar ◽  
A. L. Babb
Keyword(s):  
Diffusion Coefficients ◽  
Self Diffusion ◽  
Diffusion In Liquids

Diffusion in hydrogel-supported phospholipid bilayer membranes

2013 ◽  
Vol 723 ◽  
pp. 352-373 ◽  
Author(s):  
Chih-Ying Wang ◽  
Reghan J. Hill
Keyword(s):  
Tracer Diffusion ◽  
Membrane Dynamics ◽  
The Self ◽  
Phospholipid Bilayer ◽  
Total Force ◽  
Membrane Thickness ◽  
Bilayer Membranes ◽  
Self Diffusion ◽  
Planar Membrane ◽  
Self Diffusion Coefficient

AbstractWe model a cylindrical inclusion (lipid or membrane protein) translating with velocity$U$in a thin planar membrane (phospholipid bilayer) that is supported above and below by Brinkman media (hydrogels). The total force$F$, membrane velocity, and solvent velocity are calculated as functions of three independent dimensionless parameters:$\Lambda = \eta a/ ({\eta }_{m} h)$,${\ell }_{1} / a$and${\ell }_{2} / a$. Here,$\eta $and${\eta }_{m} $are the solvent and membrane shear viscosities,$a$is the particle radius,$h$is the membrane thickness, and${ \ell }_{1}^{2} $and${ \ell }_{2}^{2} $are the upper and lower hydrogel permeabilities. As expected, the dimensionless mobility$4\mathrm{\pi} \eta aU/ F= 4\mathrm{\pi} \eta aD/ ({k}_{B} T)$(proportional to the self-diffusion coefficient,$D$) decreases with decreasing gel permeabilities (increasing gel concentrations), furnishing a quantitative interpretation of how porous, gel-like supports hinder membrane dynamics. The model also provides a means of inferring hydrogel permeability and, perhaps, surface morphology from tracer diffusion measurements.

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