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Structure and Electron Transport at Metal Atomic Junctions Doped with Dichloroethylene
Author(s) -
Fukuzumi Risa,
Kaneko Satoshi,
Fujii Shintaro,
Nishino Tomoaki,
Kiguchi Manabu
Publication year - 2020
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201900988
Subject(s) - metal , doping , conductance , materials science , break junction , atomic radius , transition metal , atom (system on chip) , atomic number , chemical physics , chemistry , atomic physics , condensed matter physics , optoelectronics , metallurgy , biochemistry , physics , organic chemistry , computer science , embedded system , catalysis
We have investigated the structure and electron transport at dichloroethylene‐doped metal atomic junctions at low temperatures (20 K) in ultra‐high vacuum, using Fe, Ni, Pd, Cu, Ag, and Au. The metal atomic junctions were fabricated using the mechanically controllable break junction technique. After introducing the dichloroethylene (DCE), the conductance behavior of Fe, Ni, and Pd junctions was considerably changed, whereas little change was observed for Cu, Ag, and Au. For the Pd and Cu junctions, a clear peak was observed in their conductance histograms, showing that the single‐molecule junction was selectively formed. To investigate the structure of the metal atomic junctions further, their plateau lengths were analyzed. The length analysis revealed that the Au atomic wire was elongated, and the metal atomic wires were formed for the other transition metals: those that do not normally form metal atomic wires without DCE doping, as DCE adsorption stabilized the metal atomic states. There is a strong interaction between DCE and the metals, where DCE supports the formation of the metal atomic wire for Fe, Ni, and Pd.