نتایج جستجو برای: surface charges

تعداد نتایج: 653259  

2002
D. B. Lukatsky S. A. Safran

– We predict theoretically that long-wavelength surface charge modulations universally reduce the pressure between the charged surfaces with counterions compared with the case of uniformly charged surfaces with the same average surface charge density. The physical origin of this effect is the fact that surface charge modulations always lead to enhanced counte-rion localization near the surfaces...

Journal: :Chemical communications 2007
Weian Zhao William Chiuman Jeffrey C F Lam Michael A Brook Yingfu Li

Non-crosslinking gold nanoparticle (AuNP) aggregation induced by the loss (or screen) of surface charges is applied for enzymatic activity sensing and potentially inhibitor screening.

Journal: :Physical review. D, Particles and fields 1995
Bañados

We use the Regge-Teitelboim method to treat surface integrals in gauge theories to find global charges in Chern-Simons theory. We derive the affine and Virasoro generators as global charges associated with symmetries of the boundary. The role of boundary conditions is clarified. We prove that for diffeomorphisms that do not preserve the boundary there is a classical contribution to the central ...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2011
Zecheng Gan Zhenli Xu

The polarization-induced charges of a dielectric sphere are studied for charged colloidal systems in electrolyte solutions with a primitive model. The method of constructing multiple-image charges is used to approximate the polarization potential of a microion outside the sphere; it is based on a numerical discretization of the potential's analytical integral representation, and can systematica...

2008
L. BOULTON M. P. GARCIA DEL MORAL A. RESTUCCIA

The spectrum of the bosonic sector of the D = 11 supermembrane with central charges is shown to be discrete and with finite multiplicities, hence containing a mass gap. The result extends to the exact theory our previous proof of the similar property for the SU(N) regularised model and strongly suggest discreteness of the spectrum for the complete Hamiltonian of the supermembrane with central c...

1996
Candee C. Chambers Gregory D. Hawkins Christopher J. Cramer Donald G. Truhlar

We present a new set of geometry-based functional forms for parametrizing effective Coulomb radii and atomic surface tensions of organic solutes in water. In particular, the radii and surface tensions depend in some cases on distances to nearby atoms. Combining the surface tensions with electrostatic effects included in a Fock operator by the generalized Born model enables one to calculate free...

2014
Alexander Goryaynov Weidong Yang

Transport of genetic materials and proteins between the nucleus and cytoplasm of eukaryotic cells is mediated by nuclear pore complexes (NPCs). A selective barrier formed by phenylalanine-glycine (FG) nucleoporins (Nups) with net positive charges in the NPC allows for passive diffusion of signal-independent small molecules and transport-receptor facilitated translocation of signal-dependent car...

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