Tunneling Desorption of Single Hydrogen on the Surface of Titanium Dioxide
Source abstract
Abstract
We investigated the reaction mechanism of the desorption of single hydrogen from a titanium dioxide surface excited by the tip of a scanning tunneling microscope (STM). Analysis of the desorption yield, in combination with theoretical calculations, indicates the crucial role played by the applied electric field. Instead of facilitating desorption by reducing the barrier height, the applied electric field causes a reduction in the barrier width, which, when coupled with the electron excitation induced by the STM tip, leads to the tunneling desorption of the hydrogen. A significant reduction in the desorption yield was observed when deuterium was used instead of hydrogen, providing further support for the tunneling-desorption mechanism.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Chemical Physics Studies · Quantum, superfluid, helium dynamics · Catalysis and Oxidation Reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
International Advanced Research and Education Organization, Tohoku University, Sendai 980-8578, Japan
Surface and Interface Science Laboratory, RIKEN, 2-1 Hirosawa, Saitama 351-0198, Japan
Department of Physics, Chiba University, 1-33 Yayoi, Inage, Chiba 263-0022, Japan
Department of Chemistry, University College London, London WC1H 0AJ, United Kingdom
WPI Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan
Department of Advanced Materials Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
Funding
Ministry of Education, Culture, Sports, Science, and Technology · Japan Science Society · Tohoku University · Hitachi
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