Accession Number : ADA266237


Title :   The Interaction of HCN(DCN) with Si(111)-7x7 Studied with HREELS, UPS and XPS


Descriptive Note : Technical rept.


Corporate Author : EMORY UNIV ATLANTA GA DEPT OF CHEMISTRY


Personal Author(s) : Bu, Y ; Ma, L ; Lin, M C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266237.pdf


Report Date : Jan 1993


Pagination or Media Count : 25


Abstract : The interaction of HCN (DCN) with Si(111)-7x7 was studied with high resolution electron energy loss spectroscopy (HREELS), ultra-violet photo- electron spectroscopy (UPS) and X-ray photoelectron spectroscopy (XPS). HCN (DCN) formed dimers and/or polymers on the surface at 100 K with higher dosages (D4 L). Above 200K, CN radicals in an end-on adsorption geometry were identified as the major species which survived up to 600 K on the surface. This observation was different from that with HCN (DCN) on Si(100)-2xl, where the relative concentration of the HCNH species was higher. The observed difference in the behavior of HCN (DCN) on Si(111)-7x7 and Si(100)-2xl could be ascribed to the different topologies of the two surfaces.


Descriptors :   *SILICON , *HYDROGEN CYANIDE , TEMPERATURE , VIBRATION , INTERACTIONS , ADSORPTION , POLYMERS , ENERGY , SEMICONDUCTORS , DOSAGE , CHEMICAL RADICALS , ULTRAVIOLET SPECTRA , DIMERS , ELECTRON SPECTROSCOPY , LOSSES , GEOMETRY , CARBON , HIGH RESOLUTION , NITROGEN , SURFACES , ELECTRONS , ELECTRON ENERGY , X RAY PHOTOELECTRON SPECTROSCOPY


Subject Categories : Physical Chemistry
      Polymer Chemistry
      Electrical and Electronic Equipment
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE