The interaction of oxygen with Bi(0001): Kinetic,electronic, and structural features |
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Authors: | T.N. Taylor C.T. Campbell J.W. Rogers W.P. Ellis J.M. White |
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Affiliation: | Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA |
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Abstract: | The interaction of oxygen with clean Bi(0001) was studied for adsorption between 118 and 296 K using LEED, Auger, electron energy loss, and work function measurements. Oxygen adsorption kinetics show an activated process with a dissociative sticking probability (<10?4) which smoothly decreases over two orders of magnitude up to saturation coverage. Changes in surface electronic properties indicate that an oxide-like bond is formed from the onset of adsorption. There is no evidence for a stable chemisorbed phase. LEED shows simultaneous growth of epitaxial BiO(0001) and a overlayer. At 296 K the adsorption terminates after about three equivalent monolayers of BiO(0001). Periodic trends extended from the transition metal series suggest that local and atomic characteristic rather than long-range electronic properties determine the low reactivity of this surface toward O2. |
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