ISSN:
1292-895X
Keywords:
PACS. 87.68.+z Biomaterials and biological interfaces - 87.16.Dg Membranes bilayers and vesicles - 68.10.-m Fluid surfaces and fluid-fluid interfaces
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: Using both theoretical modeling and computer simulations we study a model system for DNA interactions in the vicinity of charged membranes. We focus on the polarization of the mobile charges in the membranes due to the nearby charged rods (DNA) and the resulting screening of their fields and inter-rod interactions. We find, both within a Debye-Hückel model and in Brownian dynamics simulations, that the confinement of the mobile charges to the surface leads to a qualitative reduction in their ability to screen the charged rods to the degree that the fields and resulting interactions are not finite-ranged as in systems including a bulk salt concentration, but rather decay algebraically and the screening effect is more like an effective increase in the multipole moment of the charged rod.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s101890050035
