33rd International Field Emission Symposium / 33ème Symposium International d'Emission de Champ
J. Phys. Colloques 47 (1986) C7-117-C7-119
DOI: 10.1051/jphyscol:1986721
CARBON ON PLATINUM : INVESTIGATIONS BY FIELD EMISSION MICROSCOPY
R. VANSELOW et M. MUNDSCHAUDepartment of Chemistry and Laboratory for Surface Studies, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, U.S.A.
Abstract
Investigations by FEM, UHV-SEM, and high resolution scanning AES indicate the formation of two types of graphite islands on Pt. One forms at low temperatures (~ 870 K to ~ 1150 K) in the high Miller index areas at the exit point of dislocations, the other grows face specifically above 1150 K in the area of . The growth rate in the vicinal area of is determined by the misfit parallel to the respective step edges. The alignment of graphite on Pt is graphite <11[MATH]0> || Pt<110>, which is in agreement with the calculated orientation of smallest epitaxial misfit.