title: Substrate-mediated interactions and intermolecular forces between molecules adsorbed on surfaces.
abstract: Adsorbate interactions and reactions on metal surfaces have been investigated using scanning tunneling microscopy. The manners in which adsorbates perturb the surface electronic structure in their vicinity are discussed. The effects these perturbations have on other molecules are shown to be important in overlayer growth. Interactions of molecules with surface steps are addressed, and each molecule's electron affinity is shown to dictate its adsorption sites at step edges. Standing waves emanating from steps are demonstrated to effect transient molecular adsorption up to 40 A away from the step edge. Halobenzene derivatives are used to demonstrate how the surface is important in aligning reactive intermediates.
authors.affiliation: Department of Chemistry, The Pennsylvania State University, 152 Davey Laboratory, University Park, Pennsylvania 16802, USA.
authors.forename: E Charles H
authors.initials: EC
authors.lastname: Sykes
authors.forename: Patrick
authors.initials: P
authors.lastname: Han
authors.forename: S Alex
authors.initials: SA
authors.lastname: Kandel
authors.forename: Kevin F
authors.initials: KF
authors.lastname: Kelly
authors.forename: Gregory S
authors.initials: GS
authors.lastname: McCarty
authors.forename: Paul S
authors.initials: PS
authors.lastname: Weiss
mesh_terms: D000327:Adsorption; D001554:Benzene / Q000737:chemistry; D002246:Carbon Disulfide / Q000737:chemistry; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D003300:Copper / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D007462:Iodobenzenes / Q000737:chemistry; D016252:Microscopy, Scanning Tunneling / Q000379:methods*; D015394:Molecular Structure; D009570:Nitriles / Q000737:chemistry; D010984:Platinum / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D013499:Surface Properties
chemical_list: D007462:Iodobenzenes; D009570:Nitriles; C013703:tetracyanoquinodimethane; D012834:Silver; D010984:Platinum; D006046:Gold; D003300:Copper; C031905:iodobenzene; D001554:Benzene; D002246:Carbon Disulfide