Journal ArticleDOI
Attraction between negatively charged surfaces mediated by spherical counterions with quadrupolar charge distribution
Jasna Urbanija,Klemen Bohinc,Alfredo Bellen,Stefano Maset,Aleš Iglič,Veronika Kralj-Iglič,P. B. Sunil Kumar +6 more
TLDR
For high enough charge densities of the interacting surfaces and large enough l, the interaction between surfaces turns repulsive as the distance between charges is reduced, and within a mean field approach an attractive interaction between like-charged surfaces originating from orientational ordering of quadrupolar counterions is obtained.Abstract:
We observed monoclonal antibody mediated coalescence of negatively charged giant unilamellar phospholipid vesicles upon close approach of the vesicles. This feature is described, using a mean field density functional theory and Monte Carlo simulations, as that of two interacting flat electrical double layers. Antibodies are considered as spherical counterions of finite dimensions with two equal effective charges spatially separated by a fixed distance l inside it. We calculate the equilibrium configuration of the system by minimizing the free energy. The results obtained by solving the integrodifferential equation and by performing the Monte Carlo simulation are in excellent agreement. For high enough charge densities of the interacting surfaces and large enough l, we obtain within a mean field approach an attractive interaction between like-charged surfaces originating from orientational ordering of quadrupolar counterions. As expected, the interaction between surfaces turns repulsive as the distance between charges is reduced.read more
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Cells Electric Charge Analyses Define Specific Properties For Cancer Cells Activity
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Cells electric charge analyses define specific properties for cancer cells activity
TL;DR: The surface electrical charge of cells is conditioned by the ionic medium in which they are immersed as discussed by the authors , which is especially important in tumour cells because it determines their state of aggregation and their adhesion in the different organs.
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A field theoretic approach to the electric interfacial layer — Mixture of trivalent rod-like and monovalent point-like ions between charged walls
Klemen Bohinc,Leo Lue +1 more
TL;DR: In this article, the interaction between charged macroions (surfaces) immersed in a solution of oppositely charged, rod-like counterions and point-like co-ions was modeled by a field theoretic approach.
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Interaction of cells with different types of TiO2 nanostructured surfaces
TL;DR: In this article , the biocompatibility of two distinct morphologies of TiO2 nanostructures, nanotubes and nanocubes, prepared by electrochemical anodisation and hydrothermal method, respectively, was discussed.
Journal ArticleDOI
Impact of the inner solute structure on the electrostatic mean-field and strong-coupling regimes of macromolecular interactions
TL;DR: In this article , the authors derived a contact-value identity valid for general intramolecular solute structure and electrostatic coupling strength in the electrostatic mean-field regime, and showed that the inner charge spread of the solute particles induced the twofold enhancement of short-range Poisson-Boltzmann level membrane repulsion and a longer-range depletion attraction.
References
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Book
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TL;DR: The forces between atoms and molecules are discussed in detail in this article, including the van der Waals forces between surfaces, and the forces between particles and surfaces, as well as their interactions with other forces.
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Barry Honig,Anthony Nicholls +1 more
TL;DR: A major revival in the use of classical electrostatics as an approach to the study of charged and polar molecules in aqueous solution has been made possible through the development of fast numerical and computational methods to solve the Poisson-Boltzmann equation for solute molecules that have complex shapes and charge distributions.
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Journal ArticleDOI
Electrostatic correlations: from plasma to biology
TL;DR: The thermodynamic consequences of electrostatic correlations in a variety of systems ranging from classical plasmas to molecular biology are reviewed.