Counterion distribution near a monolayer of variable charge density
2007-07-01 | journal article; research paper. A publication with affiliation to the University of Göttingen.
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- Authors
- Giewekemeyer, Klaus ; Salditt, Tim
- Abstract
- We study the bromide counterion distribution near a solid-supported monolayer in the case of vanishing bulk electrolyte concentration by resonant X-ray reflectivity. The surface charge density of the monolayer was varied by using different molar ratios of the cationic Di-Octadecyl-Di-methyl-Ammonium-Bromide (DODAB) and the neutral Di-Palmitoyl-Glycero-Phosphocholine (DPPC). The analysis, either based on a conventional box model with an additional counterion contribution, or based on an independent unbiased global optimization approach, yields a good agreement with the classical Poisson- Boltzmann theory for the salt-free case. Copyright (c) EPLA, 2007.
- Issue Date
- 1-July-2007
- Journal
- Europhysics Letters (EPL)
- Organization
- Institut für Röntgenphysik
- Working Group
- RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)
- ISSN
- 0295-5075
- Subject(s)
- x-ray scattering; membrane biophysics