Minato, T;
Kajita, S;
Pang, CL;
Asao, N;
Yamamoto, Y;
Nakayama, T;
Kawai, M;
(2015)
Tunneling Desorption of Single Hydrogen on the Surface of Titanium Dioxide.
ACS Nano
, 9
(7)
pp. 6837-6842.
10.1021/acsnano.5b01607.
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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.
| Type: | Article |
|---|---|
| Title: | Tunneling Desorption of Single Hydrogen on the Surface of Titanium Dioxide |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acsnano.5b01607 |
| Publisher version: | http://dx.doi.org/10.1021/acsnano.5b01607 |
| Language: | English |
| Additional information: | This document is the Accepted Manuscript version of a ACS Nano, copyright © 2015 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acsnano.5b01607 |
| Keywords: | defect, manipulation, scanning tunneling microscopy, titanium dioxide |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1469911 |
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