Optical spectroscopy and scanning tunneling microscopy studies of molecular adsorbates and anisotropic ultrathin films. Final report Page: 4 of 11
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The bonding, chemistry and ordering of molecular adsorbates on well defined
single crystal surfaces and in ultrathin films was be studied in an effort to develop sufficient
fundamental understanding to allow the controlled preparation of anisotropic ultrathin films
of organic monolayers. In this research we combine the use of optical probes (Raman
spectroscopy, laser induced thermal desorption with Fourier transform mass spectrometry
detection) with scanning tunneling microscopy (STM) and conventional methods of UHV
surface science (Auger electron spectroscopy, x-ray photoelectron spectroscopy, low
energy electron diffraction, and thermal desorption spectroscopy). The conventional
surface probes provide well tested methods for the preparation and characterization of
single crystal substrates. The optical probes used in our experiments provide powerful
methods for the molecular identification of adsorbates in monolayers and ultrathin
films. Scanning tunneling microscopy provides us with the ability to determine the detailed
molecular level ordering of the molecular adsorbates. The emphasis of this research is on
more complex molecular adsorbates some of which are monomer precursors to ultrathin
Enhanced methods of Raman spectroscopy have been developed for the study of
monolayer adsorbates on surfaces in ultrahigh vacuum environments.
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Hemminger, J. C. Optical spectroscopy and scanning tunneling microscopy studies of molecular adsorbates and anisotropic ultrathin films. Final report, report, September 1, 1998; Irvine, California. (digital.library.unt.edu/ark:/67531/metadc703290/m1/4/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.