Abstract
Monolithic nanoscopic tunnel junctions fabricated by atomic layer deposition are used to investigate the reversible adsorption and detection of a vapor phase molecule by inelastic electron tunneling spectroscopy. Molecular adsorption of acetic acid at room temperature is enhanced by a direct current electric field between the electrodes to attract and trap the molecules. Step-like features in current versus time plots are observed and assigned to discrete adsorption events. Inelastic electron tunneling spectra recorded at cryogenic temperatures match the signatures of acetic acid vibrational modes and indicate that the molecules are generally physisorbed in the junction. Annealing the tunnel junctions above room temperature desorbs molecules from the junction, and the removal of molecular features is verified by the tunneling spectra. Molecules are readsorbed in the same tunnel junctions at room temperature, which demonstrates reversible adsorption.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
