Observations of anisotropic electron scattering on graphite with a low-temperature scanning tunneling microscope

Article Abstract:

Low-temperature scanning tunneling microscopy was used in studying the anisotropic scattering from point defects on the surface of graphite. The experiments were done using an ultrahigh-vacuum STM at 77 K. The experimental results obtained were in close agreement with theoretical calculations made by Mizes and Foster. The images are similar with those of three-fold scattering using a C60-functionalized probe tip at room temperature.

Analysis, Surfaces (Physics), Graphite, Electron scattering

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Combining scanning tunneling microscopy and infrared spectroscopic characterization of mixed surface assemblies of linear conjugated guest molecules in host alkanethiolate monolayers on gold

Article Abstract:

Research designed to characterize the structures of mixed self-assembled monolayers of fully conjugated, linear thiolate-terminated molecules and short chain (8-12) n-alkanethiolates on Au{111} is presented. It is concluded that phenylethynyl oligomers can be inserted into defect sites in self-assembled alkanethiol monolayers of various thicknesses.

Monomolecular films, Infrared spectroscopy

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Electron transfer through organic molecules

Article Abstract:

The authors discuss the means to measure electronically the transfer of electrons though organic molecules and films. Two-layer tunnel junction model has been used to demonstrate the difference between the measured topography in scanning tunneling microscopy and the physical heights of the molecules.

United States, Chemistry, Physical and theoretical, Physical chemistry, Molecules, Tunneling (Physics)

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