Chemical reactions of water molecules on Ru(0001) induced by selective excitation of vibrational modes

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Tunneling electrons in a scanning tunneling microscope were used to excite specific vibrational quantum states of adsorbed water and hydroxyl molecules on a Ru(0 0 0 1) surface. The excited molecules relaxed by transfer of energy to lower energy modes, resulting in diffusion, dissociation, desorption, and surface-tip transfer processes. Diffusion of H{sub 2}O molecules could be induced by excitation of the O-H stretch vibration mode at 445 meV. Isolated molecules required excitation of one single quantum while molecules bonded to a C atom required at least two quanta. Dissociation of single H{sub 2}O molecules into H and OH required electron ... continued below

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Mugarza, Aitor; Shimizu, Tomoko K.; Ogletree, D. Frank & Salmeron, Miquel May 7, 2009.

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Tunneling electrons in a scanning tunneling microscope were used to excite specific vibrational quantum states of adsorbed water and hydroxyl molecules on a Ru(0 0 0 1) surface. The excited molecules relaxed by transfer of energy to lower energy modes, resulting in diffusion, dissociation, desorption, and surface-tip transfer processes. Diffusion of H{sub 2}O molecules could be induced by excitation of the O-H stretch vibration mode at 445 meV. Isolated molecules required excitation of one single quantum while molecules bonded to a C atom required at least two quanta. Dissociation of single H{sub 2}O molecules into H and OH required electron energies of 1 eV or higher while dissociation of OH required at least 2 eV electrons. In contrast, water molecules forming part of a cluster could be dissociated with electron energies of 0.5 eV.

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  • Journal Name: Surface Science; Journal Volume: 603; Journal Issue: 13

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  • Report No.: LBNL-1856E
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1016/j.susc.2009.03.026 | External Link
  • Office of Scientific & Technical Information Report Number: 957332
  • Archival Resource Key: ark:/67531/metadc929814

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  • May 7, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Oct. 2, 2017, 11:45 a.m.

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Mugarza, Aitor; Shimizu, Tomoko K.; Ogletree, D. Frank & Salmeron, Miquel. Chemical reactions of water molecules on Ru(0001) induced by selective excitation of vibrational modes, article, May 7, 2009; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc929814/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.