Collective charge excitations along cell membranes

Collective charge excitations along cell membranes

A significant part of the thin layers of counter-ions adjacent to the exterior and interior surfaces of a cell membrane form quasi-two-dimensional (2D) layers of mobile charge. Collective charge density oscillations, known as plasmon modes, in these 2D charged systems of counter-ions are predicted in the present paper. This is based on a calculation of the self-consistent response of this syste...

Ab initio investigation of collective charge excitations in MgB2.

A sharp collective charge excitation is predicted in MgB2 at approximately 2.5 eV for q perpendicular to the boron layers, based on an all-electron analysis of the dynamical density response within time-dependent density functional theory. This novel excitation, consisting of coherent charge fluctuation between Mg and B sheets, induces an abrupt plasma edge in the experimentally observable refl...

Diffuse Charge Effects in Fuel Cell Membranes

Diffuse Charge Effects in Fuel Cell Membranes P. Maarten Biesheuvel, Alejandro A. Franco,* and Martin Z. Bazant* Department of Environmental Technology, Wageningen University, Wageningen, The Netherlands Materials Innovation Institute, Delft, The Netherlands Commissariat à l’Energie Atomique/DRT/LITEN/Département des Technologies de l’Hydrogène/ Laboratoire de Composants PEM, 38000 Grenoble, Fr...

Collective charge excitations of strongly correlated electrons, vertex corrections, and gauge invariance

Collective charge-density excitations of non-circular quantum dots in a magnetic field

Recent photoabsorption measurements have revealed a rich fine structure in the collective charge-density excitation spectrum of few-electron quantum dots in the presence of magnetic fields. We have performed systematic computational studies of the far-infrared density response of quantum dots, using time-dependent density-functional theory in the linear regime and treating the dots as two-dimen...