Adsorbate effect on conductance quantization in metallic nanowires
作者： CZ Li , H Sha , NJ Tao , None
关键词: Condensed matter physics 、 Chemisorption 、 Thiophenol 、 Ballistic conduction 、 Adsorption 、 Materials science 、 Vapor pressure 、 Physisorption 、 Conductance 、 Nanowire 、 Analytical chemistry
摘要: of the setup using an environmental chamber ~Molecular Imaging Co.! into which various species are introduced for adsorption. We have chosen three species, ethanol, pyridine, and 4-hydroxyl thiophenol ~4 HTP! in this study because their adsorption strengths vary from weak physisorption (,k BT;0.025 eV) to intermediate ~;0.5 eV! very strong chemisorption ~; 2e V !. compare results with those N 2 . In order maximize chance observing adsorbate effect, we used saturated vapor each cases. From concentrations, average rate molecules directly collide narrowest portion a nanowire is greater than 10 8 /sec. The lifetime many ms, during mol
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