Relevant bibliographies by topics / Debye-Huckel

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  2. Dissertations / Theses
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Academic literature on the topic 'Debye-Huckel'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2022

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Journal articles on the topic "Debye-Huckel"

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Blender, R., and W. Dieterich. "Debye-Huckel theory on random fractals." Journal of Physics A: Mathematical and General 19, no. 13 (September 11, 1986): L785—L790. http://dx.doi.org/10.1088/0305-4470/19/13/006.

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Zuckermann, M. J., A. Georgallas, and D. A. Pink. "The effect of electrostatic interactions and water polarization on the properties of charged lipid membranes: a theoretical approach." Canadian Journal of Physics 63, no. 9 (September 1, 1985): 1228–34. http://dx.doi.org/10.1139/p85-201.

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We describe the physical properties of a planar interface between an electrolyte and a charged lipid membrane. The model differs from the usual Gouy–Chapman–Debye–Huckel theory for electrolytes in that the dipolar nature of the water molecules is explicitly included. The polarization, dielectric constant, and electric potential of the electrolyte are calculated as functions of distance from the interface. The change in gel – liquid-crystal transition temperature is obtained as a function of pH and salt concentration from the free energy of the system. The results are compared to previous calculations using the Gouy–Chapman–Debye–Huckel theory and to experimental data for dimyristoyl-methylphosphoric acid.
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Quarati, P., and A. M. Scarfone. "Modified Debye‐Huckel Electron Shielding and Penetration Factor." Astrophysical Journal 666, no. 2 (September 10, 2007): 1303–10. http://dx.doi.org/10.1086/520058.

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Dobrynin, Andrey V., Michael Rubinstein, and Jean-François Joanny. "Polyampholyte solutions between charged surfaces: Debye–Huckel theory." Journal of Chemical Physics 109, no. 20 (November 22, 1998): 9172–76. http://dx.doi.org/10.1063/1.477470.

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Lee, Song Hi, and Joseph B. Hubbard. "Electrolytes constrained on fractal structures: Debye–Huckel theory." Journal of Chemical Physics 98, no. 2 (January 15, 1993): 1504–8. http://dx.doi.org/10.1063/1.464314.

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Borchardt, G., K. Kowalski, J. Nowotny, M. Rekas, and W. Weppner. "Electrical properties of undoped CoO — a Debye-Huckel approach." Journal of Materials Science 31, no. 19 (October 1996): 5185–90. http://dx.doi.org/10.1007/bf00355923.

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Sailaja, A., B. Srinivas, and I. Sreedhar. "Electroviscous Effect of Power Law Fluids in a Slit Microchannel With Asymmetric Wall Zeta Potentials." Journal of Mechanics 35, no. 4 (August 2, 2018): 537–47. http://dx.doi.org/10.1017/jmech.2018.25.

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ABSTRACTThis work analyzes the pressure driven flow of a power law fluid in a slit microchannel of asymmetric walls with electroviscous effects. The steady state Cauchy momentum and the Poisson-Boltzmann equation are solved for the velocity and the potential distribution inside the microchannel. The Debye-Huckel approximation as applicable for low zeta potentials is not made in the present work. The unknown streaming potential is solved by casting the governing equations as an optimization problem using COMSOL Multiphysics. This proposed method is very robust and can be used for a wide variety of cases. It is found that the asymmetry of the zeta potential at the two walls plays an important role on the streaming potential developed. There is a unique zeta potential ratio at which the streaming potential exhibits a maxima for both Debye-Huckel parameter and the power law index. Shear thinning fluids exhibit a stronger dependency of the streaming potential on asymmetry of the zeta potential than shear thickening fluids. For Newtonian fluids narrow slit microchannels develop larger streaming potentials compared to wider microchannels for a given asymmetry.
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Wagner, K., E. Keyes, T. W. Kephart, and G. Edwards. "Analytical Debye-Huckel model for electrostatic potentials around dissolved DNA." Biophysical Journal 73, no. 1 (July 1997): 21–30. http://dx.doi.org/10.1016/s0006-3495(97)78043-3.

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Nowotny, Janusz, and Mieczyslaw Rekas. "Defect Structure of Cobalt Monoxide: II, The Debye-Huckel Model." Journal of the American Ceramic Society 72, no. 7 (July 1989): 1207–14. http://dx.doi.org/10.1111/j.1151-2916.1989.tb09709.x.

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Gutierrez, F. A., H. Jouin, and E. Cormier. "A comparative study of the ion-sphere and debye-huckel potentials." Journal of Quantitative Spectroscopy and Radiative Transfer 51, no. 5 (May 1994): 665–69. http://dx.doi.org/10.1016/0022-4073(94)90122-8.

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Dissertations / Theses on the topic "Debye-Huckel"

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Kirby, Carl Scott. "Prediction of electrolyte solution properties using a combined Debye-Huckel, association and solvation model." Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/46043.

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This paper presents a semi-theoretical computer model that estimates individual and mean ionic activity coefficients in the NaCl-NaOH-HCl-H₂O system at 25°C. This extra thermodynamic model incorporates long-range electrostatic ion-ion interaction (Debye- Hückel effects), short-range ion-ion interactions (ion association), and short-range ion-solvent interactions (hydration). The activity of water in NaCl, NaOH, and HCl solutions is fit with maximum deviations from experimental values of 0.78%, 0.79%, and 2.09%, respectively. Ion size parameters, å, were modified slightly from literature values. Hydration numbers for individual species were chosen on the basis of best fit. Ion pair dissociation constants of 15.0 were chosen for reactions involving NaCl(aq), NaOH(aq), and HCl(aq) ion pairs. The model predicts individual ionic activity coefficients for ions and ion pairs, and predicts mean molal ionic activity coefficients for NaCl, NaOH, and HCl for solutions up to 6.0 m with maximum deviations from experimental values of 0.73%, 1.77%, and 3.86%,respectively. The estimated degree of dissociation varies widely if the ion pair dissociation constants are varied between 5 and 1000. Calculated values for trace activity coefficients, saturation solubility, and vapor pressure compare favorably to experimental data.
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Li, Yang. "Electrostatics of the Binding and Bending of Lipid Bilayers: Charge-Correlation Forces and Preferred Curvatures." Thesis, University of Waterloo, 2004. http://hdl.handle.net/10012/1282.

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Lipid bilayers are key components of biomembranes; they are self-assembled two-dimensional structures, primarily serving as barriers to the leakage of cell's contents. Lipid bilayers are typically charged in aqueous solution and may electrostatically interact with each other and with their environment. In this work, we investigate electrostatics of charged lipid bilayers with the main focus on the binding and bending of the bilayers. We first present a theoretical approach to charge-correlation attractions between like-charged lipid bilayers with neutralizing counterions assumed to be localized to the bilayer surface. In particular, we study the effect of nonzero ionic sizes on the attraction by treating the bilayer charges (both backbone charges and localized counterions) as forming a two-dimensional ionic fluid of hard spheres of the same diameter D. Using a two-dimensional Debye-Hückel approach to this system, we examine how ion sizes influence the attraction. We find that the attraction gets stronger as surface charge densities or counterion valency increase, consistent with long-standing observations. Our results also indicate non-trivial dependence of the attraction on separations h: The attraction is enhanced by ion sizes for h ranges of physical interest, while it crosses over to the known D-independent universal behavior as h → ∞; it remains finite as h → 0, as expected for a system of finite-sized ions. We also study the preferred curvature of an asymmetrically charged bilayer, in which the inner leaflet is negatively charged, while the outer one is neutral. In particular, we calculate the relaxed area difference Δ A0 and the spontaneous curvature C0 of the bilayer. We find Δ A0 and C0 are determined by the balance of a few distinct contributions: net charge repulsions, charge correlations, and the entropy associated with counterion release from the bilayer. The entropic effect is dominant for weakly charged surfaces in the presence of monovalent counterions only and tends to expand the inner leaflet, leading to negative Δ A0 and C0. In the presence of even a small concentration of divalent counterions, however, charge correlations counterbalance the entropic effect and shrink the inner leaflet, leading to positive Δ A0 and C0. We outline biological implications of our results.
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Jeannin, Marc. "Reconnaissance moléculaire dans des solutions ioniques paramagnétiques par relaxation nucléaire." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10070.

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Nous etudions la structure locale de solutions d'electrolytes comportant des impuretes parama/gnetiques par des mesures des temps de relaxation nucleaire en rmn. Grace aux equations integrales de la theorie des liquides et au modele de debye-huckel d'ecrantage du potentiel coulombien, nous avons obtenu des potentiels de force moyenne, puis des fonctions de correlation de paire pour des ions attractifs en solution. Nous expliquons ainsi les taux de relaxation intermoleculaires d'origine dipolaire magnetique des protons des cations tetramethylphosphonium couples aux spins electroniques des anions radicalaires nitrosodisulfonate en solution dans l'eau lourde. Nous avons ensuite developpe un modele permettant d'evaluer l'amplitude de la forte interaction hyperfine scalaire du spin electronique avec les noyaux de phosphore dont nous etudions les deplacements des raies de resonance en fonction de la concentration en ions paramagnetiques. Nous avons pu interpreter remarquablement le rapport anormal des temps de relaxation longitudinale et transverse intermoleculaires voisin de 1. 5 des noyaux de phosphore du tetramethylphosphonium en presence de radicaux nitrosodisulfonate a diverses concentrations ioniques. Nous confirmons ainsi la validite de notre modele decrivant les proprietes dynamiques d'ions attractifs dilues dans l'eau. Pour les valeurs absolues des taux de relaxation des phosphores, nos calculs conduisent a des valeurs un peu trop faibles. Notons cependant que notre modele ne dispose d'aucun parametre ajustable. Il convient de tenir compte egalement des effets d'anisotropie dans les processus diffusionnels a courte distance dus a la forme non spherique des ions. L'importance de ces effets d'anisotropie vient d'etre prouve sur un systeme plus simple constitue par une solution de radicaux tempol dans l'eau. L'introduction d'un potentiel effectif electrostatique anisotrope de paire donne alors un tres bon accord avec l'experience
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Books on the topic "Debye-Huckel"

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Sukava, A. John. Extreme-dilution behavior of electrolytes: Failure of the Debye-Huckel limiting law. London, Ont: Sukava, 1995.

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Book chapters on the topic "Debye-Huckel"

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Dutta, Avisankha, and Sudip Simlandi. "An Analytical Investigation for Combined Pressure-Driven and Electroosmotic Flow Without the Debye–Huckel Approximation." In Intelligent Manufacturing and Energy Sustainability, 553–64. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1616-0_54.

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Conference papers on the topic "Debye-Huckel"

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Dutta, Avisankha, and Sudip Simlandi. "Studies on Electroosmotic Flow through a Microchannel between Two Parallel Plates without the Debye-Huckel Approximation: An Analytical Approach." In 2020 6th International Conference on Mechatronics and Robotics Engineering (ICMRE). IEEE, 2020. http://dx.doi.org/10.1109/icmre49073.2020.9064991.

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Soni, Gaurav, Todd M. Squires, and Carl D. Meinhart. "Nonlinear Phenomena in Induced Charge Electroosmosis." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41468.

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We present an experimental and numerical investigation of induced charge electroosmosis (ICEO) on a planar electrode surface directly in contact with a high conductivity electrolytic solution. Symmetric rolls of ICEO flow were produced on the electrode by placing it in an AC electric field. The slip velocity was measured for a range of AC voltages and frequencies using micro particle image velocimetry (μPIV). The slip velocity was also calculated by finite element simulations based on a linear and a nonlinear model of electrical double layer, respectively. The μPIV measurements were found to be much lower (two and half orders of magnitude) than the velocities predicted by the linear model. The linear model is valid only under Debye Huckel approximation (φ ≪ kBT/e = 25 mVolt at room temperature) which does not hold true for practical situations. The nonlinear model, on the other hand, predicts velocities which are lower than the linear model and closer to the experimental values. The nonlinearity reduces discrepancy between experimental and numerical results by approximately an order of magnitude. The nonlinear model accounts for nonlinear capacitance of the double layer and lateral conduction of charge in the double layer.
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Lesani, Mostafa. "Mixed Pressure and AC Electroosmotically Driven Flow With Asymmetric Wall Zeta Potential and Hydrophobic Surfaces." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17144.

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The present study examines Alternating Current (AC) electroosmotic flows in a parallel plate microchannel subject to constant wall temperature. Numerical method consists of a central finite difference scheme for spatial terms and a forward difference scheme for the temporal term. Asymmetric boundary conditions are assumed for Poison-Boltzmann equation for determining the electric double layer (EDL) potential distribution. The potential distribution is then used to evaluate the velocity distribution. The velocity distribution is obtained by applying slip boundary conditions on the walls which accounts for probable hydrophobicity of surfaces. After determining the velocity distribution numerically, the energy equation is solved by taking into account the effects of viscous dissipation and non-uniform Joule heating. The results reveal that the effect of increasing Knudsen number is a slight increase in the dimensionless temperature profile. Furthermore, the effect of increasing dimensionless time is an increase in dimensionless oscillatory temperature which leads to a steady oscillatory condition. Also, the effect of increasing dimensionless Debye-Huckel parameter is a decrease in mean oscillation value and an increase in the required time for reaching steady oscillatory condition. In addition, increasing forward or backward pressure leads to increased viscous heating near the walls. Furthermore, the effect of increasing zeta potential is an increase in the dimensionless mean velocity oscillation amplitude.
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Sadr, R., Z. Zheng, M. Yoda, and A. T. Conlisk. "An Experimental and Modeling Study of Electroosmotic Bulk and Near-Wall Flows in Two-Dimensional Micro- and Nanochannels." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42917.

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Electrokinetically driven flow of electrolyte solutions through micro- and nanochannels is of interest in microelectromechanical systems (MEMS) and nanotechnology applications. In this work, fully developed and steady electroosmotic flow (EOF) of dilute sodium tetraborate and sodium chloride aqueous solutions in a rectangular channel where the channel hight h is comparable to its width W is examined. EOF is also studied under conditions of electric double layer (EDL) overlap, or λ/h ∼ O(1), where λ is the Debye thickness, for very dilute solutions. The initial experimental data and model results are in very good agreement for dilute sodium tetraborate solutions. The experimental work uses the new nano-particle image velocimetry (nPIV) technique. Evanescent waves from the total internal reflection of light with a wavelength of 488 nm at a refractive index interface is used to illuminate 100 nm neutrally buoyant fluorescent particles in the near-wall region of the flow. The images of these tracer particles over time are processed to obtain the two components of the velocity field parallel to the wall in fully developed EOF of sodium tetraborate at concentrations up to 2 mM in fused quartz rectangular channels with height h up to 10 microns. The spatial resolution of these velocity field data along the dimension normal to the wall is about 100 nm, and the data are obtained within a distance of approximately 100 nm of the wall based upon the 1/e intensity point, or penetration depth. A set of equations modeling EOF in a long channel are solved where h/L << 1, and L is the lengthscale along the flow direction. Unlike most previous models, this work does not use the Debye-Huckel approximation, nor does it assume symmetric boundary conditions. For the case where λ/h << 1, analytical solutions for the velocity, potential and mole fractions are obtained using an asymptotic perturbation approach.
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