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Shin, Hyung-Joon
Nanoscale Materials Science Lab (NMSL)
Research Interests
  • Scanning tunneling microscopy, surface science, interface science, nanomaterials

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Control of Molecular Rotors by Selection of Anchoring Sites

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Title
Control of Molecular Rotors by Selection of Anchoring Sites
Author
Kim, Hyo WonHan, M.Shin, Hyung-JoonLim, S.Oh, Y.Tamada, K.Hara, M.Kim, Y.Kawai, M.Kuk, Young
Keywords
Au(111) surfaces;  Azobenzene derivatives;  Bonding geometry;  Hollow sites;  Hopping motions;  Long chain molecules;  Molecular rotors;  Phenyl rings;  Rotation centers;  Rotational motion;  Switch-on;  Vibrational modes;  Voltage pulse
Issue Date
2011-04
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.106, no.14, pp. -
Abstract
We demonstrate a new method to switch on and off the rotational motion of a long-chain molecule by controlling the bonding geometry between the molecule and a substrate. An azobenzene derivative molecule adsorbed on a Au(111) surface is immobile only when its three rotation centers, comprised of two phenyl rings and a nitrogen-nitrogen bond, are located at hollow sites of the Au(111) surface, as observed by scanning tunneling microscopy. Rotational motion can be activated by exciting the vibrational modes and inducing hopping motion away from the immobile site with a voltage pulse.
URI
https://scholarworks.unist.ac.kr/handle/201301/2752
DOI
10.1103/PhysRevLett.106.146101
ISSN
0031-9007
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