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A reversible molecular switch is proposed, based on an observed change in a physisorbed pattern of chlorobenzene or toluene at Si(111)-(7x7), from "triangles" to "circles". Electronic excitation, at an applied surface voltage of Vs = -2.0 V, caused molecular migration, by one atomic site, from under the tip (switch "off"). Thereafter, the adsorbate pattern(More)
BACKGROUND Currently, the primary technique employed in circuit-level study of the brain is electrophysiology, recording local field or action potentials (LFPs or APs). However most communication between neurons is chemical and the relationship between electrical activity within neurons and chemical signaling between them is not well understood in vivo,(More)
In recent years great effort has been taken to understand the effect of gas transport on the performance of electrochemical devices. This study aims to characterize the diffusion regimes and the possible inaccuracies of the mass transport calculation in Solid Oxide Fuel Cell (SOFC) anodes when a volume-averaged pore diameter is used. 3D pore size(More)
Adsorbates on metals, but not previously on semiconductors, have been observed to display long-range repulsive interactions. On metals, due to efficient dissipation, the repulsions are weak, typically on the order of 5 meV at 10 Å. On the 7×7 reconstruction of the Si(111) surface, charge transport through the surface has been demonstrated by others using(More)
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