Growth modes of vapor-deposited bismuth on a Cu(110) surface

Journal Article · Thu Jun 01 04:00:00 EDT 1989 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.456284· OSTI ID:6335221

Clendening, W D; Campbell, C T

The interactions of vapor-deposited Bi with Cu(110) have been studied with x-ray photoelectron spectroscopy (XPS), thermal desorption mass spectroscopy (TDS), and low-energy electron diffraction (LEED). There is a net repulsive Bi--Bi interaction in the adlayer such that the heat of adsorption decreases from /similar to/69 to 51 kcal/mol as theta/sub Bi/ increases from /similar to/0.3 to /similar to/0.7. At low coverages (i.e., long Bi--Bi distances), this repulsive interaction is relatively isotropic, with the Bi forming a quasihexagonal c(2 x 2) adlayer. At high coverages (i.e., short Bi--Bi distances), the effective Bi--Bi interaction potential is very anisotropic, wherein there are Bi--Bi repulsions parallel to the troughs of the Cu(110) surface, but Bi--Bi attractions across these troughs. This leads to p(n x 1) overlayer structures up to completion of the monolayer. Systematic trends in the structural growth modes for metal adlayers showing net repulsive lateral interactions on one-dimensionally corrugated substrates are analyzed. It is found that three types of growth modes can be predicted depending upon a size parameter (the ratio of the metallic diameter of the adatom to the trough--trough separation of the substrate) and the nature of the substrate (fcc vs bcc).

• Research Organization: Chemistry Department, Indiana University, Bloomington, Indiana 47405
• OSTI ID: 6335221
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 90:11; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
BISMUTH
COATINGS
COHERENT SCATTERING
COPPER
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
INTERATOMIC FORCES
METALS
PHOTOELECTRON SPECTROSCOPY
POTENTIALS
ROUGHNESS
SCATTERING
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
SUBSTRATES
SURFACE PROPERTIES
TRANSITION ELEMENTS