An adjustable oxide-free tunnel junction for vibrational spectroscopy of molecules

Darin T. Zimmerman, Michael B. Weimer, Glenn Agnolet

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

We describe an adjustable, oxide-free, tunnel junction with the stability necessary to observe the vibrational modes of molecules adsorbed on clean metal surfaces. We illustrate the capabilities of this device with inelastic tunneling data from junctions whose barriers are formed by neon/acetylene mixtures of varying concentration. From the concentration dependence of the inelastic spectra, we can distinguish between acetylene molecules chemisorbed on the metal electrodes and those that are either physisorbed or incorporated in the neon barrier.

Original languageEnglish (US)
Pages (from-to)2500-2502
Number of pages3
JournalApplied Physics Letters
Volume75
Issue number16
DOIs
StatePublished - Oct 18 1999

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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