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Proceedings Paper

Analysis of molecular adsorbates by laser-induced thermal desorption
Author(s): Robert T. McIver Jr.; John C. Hemminger; D. Parker; Yong Li; Donald P. Land; Claire L. Pettiette-Hall
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Paper Abstract

A surface analysis method called LITD/FTMS has been used to measure the rate constants and detect the reaction intermediates for the dehydrogenation of various hydrocarbons on platinum. Laser-induced thermal desorption (LITD) utilizes a pulsed laser beam to rapidly heat the surface and remove intact neutral molecular species. These are then ionized by an electron beam, trapped in a magnetic field, and detected by Fourier transform mass spectrometry (FTMS). FTMS has two advantageous features: high mass resolution and the ability to record all masses simultaneously from a single laser shot. LITD/FTMS is a highly sensitive and rapid method for identifying complex molecular species adsorbed on surfaces. Intermediates in catalytic reactions can be observed and rate constants for surface-catalyzed reactions can be measured.

Paper Details

Date Published: 1 April 1991
PDF: 5 pages
Proc. SPIE 1437, Applied Spectroscopy in Material Science, (1 April 1991); doi: 10.1117/12.45137
Show Author Affiliations
Robert T. McIver Jr., Univ. of California/Irvine (United States)
John C. Hemminger, Univ. of California/Irvine (United States)
D. Parker, Univ. of California/Irvine (United States)
Yong Li, Univ. of California/Irvine (United States)
Donald P. Land, Univ. of California/Irvine (United States)
Claire L. Pettiette-Hall, Univ. of California/Irvine (United States)

Published in SPIE Proceedings Vol. 1437:
Applied Spectroscopy in Material Science
David D. Saperstein, Editor(s)

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