Characterization of the Au Atomic Contact in a Hydrogen Environment Using Vibration Spectroscopy of a Single Molecular Junction

抄録

We have developed a mechanically controllable break junction (MCBJ) system in ultra high vacuum (UHV). The Au atomic contact in a hydrogen environment was investigated using this newly developed system. The conductance of the Au atomic contact decreased with the introduction of hydrogen gas. The vibration spectra showed symmetric peaks around ±50 meV, which could be assigned to the vibration mode between Au and hydrogen. The conductance and vibration spectroscopy measurement suggested that the hydrogen atom or molecule would adsorb on or incorporate into the Au atomic contact. [DOI: 10.1380/ejssnt.2009.53]