title: Topography and transport properties of oligo(phenylene ethynylene) molecular wires studied by scanning tunneling microscopy.
abstract: Conjugated phenylene(ethynylene) molecular wires are of interest as potential candidates for molecular electronic devices. Scanning tunneling microscopic study of the topography and current-voltage (I-V) characteristics of self-assembled monolayers of two types of molecular wires are presented here. The study shows that the topography and I-Vs, for small scan voltages, of the two wires are quite similar and that the electronic and structural changes introduced by the substitution of an electronegative N atom in the central phenyl ring of these wires does not significantly alter the self-assembly or the transport properties.
mesh_terms: D004563:Electrochemistry; D004581:Electronics; D016252:Microscopy, Scanning Tunneling; D036103:Nanotechnology / Q000379:methods*; D011108:Polymers / Q000737:chemistry*; D012666:Semiconductors
chemical_list: D011108:Polymers; C473966:poly(phenylene ethynylene)