title: Nanopatterning of donor/acceptor hybrid supramolecular architectures on highly oriented pyrolytic graphite: a scanning tunneling microscopy study.
abstract: Hybrid supramolecular architectures have been fabricated with acceptor 1,4-bis(4-pyridylethynyl)-2,3-bis-dodecyloxy-benzene (PBP) and donor 2,6-bis(3,4,5-tris-dodecyloxy-phenyl)dithieno[3,2-b:2',3'-d]thiophene (DTT) compounds on highly oriented pyrolytic graphite (HOPG) surfaces, and their structures and molecular conductance are characterized by scanning tunneling microscopy/spectroscopy (STM/STS). Stable, one-component adlayers of PBP and DTT are also investigated. The coadsorption of two-component mixtures of PBP and DTT results in a variety of hybrid nanopattern architectures that differ from those of their respective one-component surface assemblies. Adjusting the acceptor/donor molar ratio in mixed adlayer assemblies results in dramatic changes in the structure of the hybrid nanopatterns. STS measurements indicate that the HOMO and LUMO energy levels of PBP and DTT on an HOPG surface are relatively insensitive to changes in the hybrid supramolecular architectures. These results provide important insight into the design and fabrication of two-dimensional hybrid supramolecular architectures.
authors.affiliation: Institute of Chemistry, Chinese Academy of Sciences, and Beijing National Laboratory for Molecular Sciences, Beijing 100190, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Wang
authors.forename: Qing
authors.initials: Q
authors.lastname: Chen
authors.forename: Ge-Bo
authors.initials: GB
authors.lastname: Pan
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Wan
authors.forename: Shiming
authors.initials: S
authors.lastname: Zhang
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Zhan
authors.forename: Brian H
authors.initials: BH
authors.lastname: Northrop
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Stang
mesh_terms: D006108:Graphite / Q000737:chemistry*; D016252:Microscopy, Scanning Tunneling; D008958:Models, Molecular; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D011758:Pyrroles / Q000737:chemistry*
chemical_list: D011758:Pyrroles; D006108:Graphite
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