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Full-Text Articles in Physics

Solvation Dynamics In Ionic Fluids: An Extended Debye–Hückel Dielectric Continuum Model, Xueyu Song Jul 2009

Solvation Dynamics In Ionic Fluids: An Extended Debye–Hückel Dielectric Continuum Model, Xueyu Song

Chemistry Publications

Motivated by our recent proposition on the possibility of using dielectric continuum models to interpret experimental measurements of solvation dynamics in room temperature ionic liquids [J. Phys. Chem. A110, 8623 (2006)], some detailed simulation studies are performed to test the validity of our proposition. From these simulation studies, it seems to be justified that an extended Debye–Hückel continuum model can be used to understand the solvation dynamics of ionic fluids. The theoretical underpinning of such an extended Debye–Hückel model is presented from the general dispersion relation in electrodynamics. The connection with the static extension from the dressed ion ...


Twofold Surface Of The Decagonal Al-Cu-Co Quasicrystal, T. Duguet, Barış Ünal, M. C. De Weerd, J. Ledieu, R. A. Ribeiro, Paul C. Canfield, S. Deloudi, W. Steurer, Cynthia J. Jenks, J.-M. Dubois, V. Fournée, Patricia A. Thiel Jan 2009

Twofold Surface Of The Decagonal Al-Cu-Co Quasicrystal, T. Duguet, Barış Ünal, M. C. De Weerd, J. Ledieu, R. A. Ribeiro, Paul C. Canfield, S. Deloudi, W. Steurer, Cynthia J. Jenks, J.-M. Dubois, V. Fournée, Patricia A. Thiel

Chemistry Publications

We have investigated the atomic structure of the twofold surface of the decagonal Al-Cu-Co quasicrystal using scanning tunneling microscopy and low-energy electron diffraction. We have found that most of the surface features can be interpreted using the bulk-structure model proposed by Deloudi and Steurer (S. Deloudi, Ph.D. thesis, ETH, Zürich, 2008). The surface consists of terraces separated by steps of various heights. Step heights and steps sequences match with the thickness and the stacking sequence of blocks of layers separated by gaps in the model. These blocks of layers define possible surface terminations consisting of periodic atomic rows which ...