Formation of a Chain-like Water Single Molecule Junction with Pd Electrodes
Author(s):
Risa Fukuzumi, Satoshi Kaneko, Shintaro Fujii, Tomoaki Nishino, Manabu Kiguchi
Journal:
The Journal of Physical Chemistry C
Year:
2018
Volume:
122
Pages
4698-4703
DOI:
10.1021/acs.jpcc.7b12605
Abstract:
Atomic scale interaction between the water molecule and the Pd electrodes was investigated by the mechanically controllable break junction technique at cryogenic temperature. The interaction between the water molecule and the atomic scale Pd electrodes and the resultant formation of the single-molecule junction of the water molecule bridging the gap between the Pd electrodes were confirmed by vibrational spectroscopy where the water–Pd vibrational mode of 70 meV was identified. We found that no water dissociation occurred on the atomic scale Pd electrodes. The electronic transport measurement revealed that the water single molecule junction carried the electronic current in the ballistic transport regime and the conductance was determined to be 1 G0 where G0 is the conductance quantum. The length analysis and current-bias voltage measurement of the junction suggest that the single water molecule is connected to Pd atomic chain.