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Session H33 - Postdeadline Poster Session II.
POSTER session, Tuesday evening, March 19
Exhibit Hall 3, America's Center
Inelastic electron tunneling spectroscopy (IETS), first pioneered by R.C. Jaklevic and J. Lambe\footnote[1]R. C. Jaklevic and J. Lambe, Phys. Rev. Lett. \bf17, 1139 (1966) in 1966, has proven to be an effective probe of the vibrational states of molecules embedded in metal oxide matrices. Recently, S. Gregory\footnote[2]Stephen Gregory, Phys. Rev. Lett. \bf64 , 6, 689 (1990) devised a novel technique to perform IETS in a crossed wire geometry without the complications arising from metal oxides normally present. We are studying the systematics of this technique in order to determine its ultimate sensitivity and applicability to surface science. Preliminary experiments with acetylene adsorbed on tungsten and platinum yield spectra which are indicative of inelastic tunneling. Other interesting features are also observed, including Coulomb blockade effects and periodic oscillations in the conductance.
