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Laser IR polarization spectroscopy at surfaces (1988)

Bethune, D. S. ; Williams, M. D. ; Luntz, A. C.

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 88 (1988), S. 3322-3330

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ISSN: 1089-7690

Source: AIP Digital Archive

Topics: Physics , Chemistry and Pharmacology

Notes: A novel form of laser polarization spectroscopy is described which allows vibrational spectra of submonolayers of some adsorbates on metal surfaces to be observed. As a demonstration of its potential, spectra for CO adsorbed on a Pt(111) single crystal were obtained using a continuously tunable pulsed IR laser. The temperature dependence of the lineshape for the CO stretch in an on-top adsorption site was measured and interpreted in terms of exchange-coupling dephasing. Since sensitivity achieved with this spectroscopy is not yet as high as that obtainable with conventional IRRAS, the issue of noise sources and sensitivity in the laser spectroscopy is examined in some detail, and possibilities for future enhancements are discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.453926

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