Surface charge density of purple membrane

Charge transport in purple membrane monolayers: a sequential tunneling approach.

Current-voltage (I-V) characteristics in proteins are sensitive to conformational changes induced by an external stimulus (photons, chemical, etc.). This sensitivity can be used in medical and industrial applications as well as shedding new light on the microscopic structure of biological materials. Here, we show that a sequential tunneling model of carrier transfer between neighboring amino ac...

Charge stabilization mechanism in the visual and purple membrane pigments.

The effects of charged groups of rhodopsin and bacteriorhodopsin on the potential energy surface of their chromophore are examined, taking into account the protein dielectric effect. It is found that the barriers for twisting double bonds of an isolated chromophore can be drastically reduced when the chromophore interacts with the protein charges. New types of local minima are found in the grou...

Experimental surface charge density of the Si „100...-2Ã1H surface

J. Ciston,1 L. D. Marks,1 R. Feidenhans’l,2 O. Bunk,3 G. Falkenberg,4 and E. M. Lauridsen5 1Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA 2Niels Bohr Institute, Copenhagen University, DK-2100 Copenhagen, Denmark 3Paul Scherrer Institut, Swiss Light Source, 5232 Villigen PSI, Switzerland 4HASYLAB at DESY, Notkestrasse 85, 22603 Hamburg, G...

Charge Density Waves and the Hidden Nesting of Purple Bronze K_{0.9}Mo_{6}O_{17}.

We introduce the first multiorbital effective tight-binding model to describe the effect of electron-electron interactions in this system. Upon fixing all the effective hopping parameters in the normal state against an ab initio band structure, and with only the overall scale of the interactions as the sole adjustable parameter, we find that a self-consistent Hartree-Fock solution reproduces ex...

Full charge-density calculation of the surface energy of metals.