نتایج جستجو برای: charge interaction

تعداد نتایج: 691632  

Journal: :Chemical communications 2006
Masakazu Morimoto Seiya Kobatake Masahiro Irie

A diarylethene derivative bearing a phenylenediamine group formed radical ions with an electron acceptor molecule in solution, and the concentration of the radical ions was modulated by the photochromic reaction of the diarylethene, reflecting the difference in the electron-donating character between the open- and closed-ring isomers.

1999
E. Epelbaum Ulf-G. Meißner

We discuss charge symmetry and charge independence breaking in an effective field theory approach for few–nucleon systems. We systematically introduce strong isospin–violating and electromagnetic operators in the theory. The charge dependence observed in the nucleon–nucleon scattering lengths is due to one–pion exchange and one electromagnetic four–nucleon contact term. This gives a parameter f...

1998
Daniel Harries

The electrostatic interaction between two parallel charged cylinders of arbitrary diameters a1 and a2 is studiedby solvingnumerically thenonlinearPoisson-Boltzmannequation. A limit of particular interest is that of a charged cylinder interacting with a charged plane (a1 f ∞). The interaction free energy is calculated, as a function of the separation distance between the cylinders, for either fi...

Journal: :Physical review letters 2002
A V Ivlev G E Morfill U Konopka

Coagulation of charged particles was studied using the mean-field Smoluchowski equation. The coagulation equation was generalized for the case of a conserved system of charged particles. It was shown that runaway cluster growth (gelation) solutions exist if the charge-dipole (induced) interaction of clusters is included. When clusters are in thermal equilibrium with the ambient gas, the charge-...

A. Khaledi-Nasab V. Fallahi,

In this paper, the interaction between an oscillating dipole moment and a Silver nanoparticle has been studied. Our calculations are based on Mie scattering theory and discrete dipole approximation(DDA) method.At first, the resonance frequency due to excitingthe localized surface plasmons has been obtained using Mie scattering theory and then by exciting a dipole moment in theclose proximity of...

1999
R. Jay Mashl Niels Grønbech-Jensen

We study the effective interaction between a planar array of uniformly negatively charged, stiff rods parallel to a negatively charged planar substrate in the absence of salt in a continuous, isotropic dielectric medium. Using Brownian dynamics simulations, we examine the general effects of counterion valence, rod spacing, macroion charge densities, and the rod size on the attractive rod-surfac...

Journal: :The journal of physical chemistry. B 2008
Julia Berashevich Tapash Chakraborty

We study the influence of humidity on the transport and magnetic properties of DNA within the quantum chemistry methods. Strong influence of water molecules on these properties, observed in this study, opens up opportunities for application of DNA in molecular electronics. Interaction of the nucleobases with water molecules leads to breaking of some of the pi bonds and appearance of unbound pi ...

Journal: :The Journal of chemical physics 2016
Nataša Adžić Rudolf Podgornik

We present a theoretical description of the effect of polyvalent ions on the interaction between titratable macroions. The model system consists of two point-like macroions with dissociable sites, immersed in an asymmetric ionic mixture of monovalent and polyvalent salts. We formulate a dressed ion strong coupling theory, based on the decomposition of the asymmetric ionic mixture into a weakly ...

Journal: :The journal of physical chemistry. A 2011
Changsun Eun Max L Berkowitz

We study some aspects of hydrophobic interaction between molecular rough and flexible model surfaces. The model we use in this work is based on a model we used previously (Eun, C.; Berkowitz, M. L. J. Phys. Chem. B 2009, 113, 13222-13228), when we studied the interaction between model patches of lipid membranes. Our original model consisted of two graphene plates with attached polar headgroups;...

Journal: :Chemphyschem : a European journal of chemical physics and physical chemistry 2015
Lokendra Poudel Amy M Wen Roger H French V Adrian Parsegian Rudolf Podgornik Nicole F Steinmetz Wai-Yim Ching

The electronic structure and partial charge of doxorubicin (DOX) in three different molecular environments-isolated, solvated, and intercalated in a DNA complex-are studied by first-principles density functional methods. It is shown that the addition of solvating water molecules to DOX, together with the proximity to and interaction with DNA, has a significant impact on the electronic structure...

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