Journal
NATURE MATERIALS
Volume 9, Issue 5, Pages 442-447Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT2740
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- RIKEN
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The interaction of water with oxide surfaces has drawn considerable interest, owing to its application to problems in diverse scientific fields. Atomic-scale insights into water molecules on the oxide surface have long been recognized as essential for a fundamental understanding of the molecular processes occurring there. Here, we report the dissociation of a single water molecule on an ultrathin MgO film using low-temperature scanning tunnelling microscopy. Two types of dissociation pathway-vibrational excitation and electronic excitation-are selectively achieved by means of injecting tunnelling electrons at the single-molecule level, resulting in different dissociated products according to the reaction paths. Our results reveal the advantage of using a MgO film, rather than bulk MgO, as a substrate in chemical reactions.
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