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Author: Steven Robey

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1. Striped Domains at the Pentacene:C^d60^ Interface
Published: 1/12/2009
Authors: Dan B. Dougherty, W Jin, J Cullen, J Reutt-Robey, Steven W Robey
Abstract: STM observations of the initial growth stages of the first layer of pentacene on a monolayer film of C60 on Ag(111) are presented. Pentacene films nucleate and grow with molecules standing up at the Pentacene:C60 interface similar to the well known ...

2. Variable Temperature Scanning Tunneling Microscopy of Pentacene Monolayer and Bilayer Phases on Ag(111)
Published: 12/25/2008
Authors: Dan B. Dougherty, Jim Wei, William Cullen, Janice Reutt-Robey, Steven W Robey
Abstract: Pentacene deposited onto a Ag(111) surface at 300 K is studied using scanning tunneling microscopy at temperatures of 300 K and 50 K.  At 300 K, ordered pentacene structures nucleate at Ag step edges (<i>Phys. Rev. B</i>  <b>2005 ...

3. Ultraviolet Photoemission Spectra of Para-Phenylene-Ethynylene Thiols Chemisorbed on Gold
Published: 1/1/2008
Authors: Christopher D Zangmeister, Roger D van Zee, Steven W Robey, N E Gruhn, Yuxing Yao, J M Tour
Abstract: Photoemission spectra of para-phenylene-ethynylene thiols chemisorbed on gold have been measured. Four compounds were studied: 4,4'-bis(phenylethynyl)-benzenethiol, 4 (phenylethynyl)benzenethiol, 4-ethynylbenzenethiol, and benzenethiol. The spectra w ...

4. Fermi Level Alignment in Self-Assembled Molecular Layers: The Effect of Coupling Chemistry
Published: 8/1/2006
Authors: Christopher D Zangmeister, Steven W Robey, Roger D van Zee
Abstract: Photoelectron spectroscopy was used to explore changes in Fermi level alignment, within the p-p* gap, arising from changes in the coupling chemistry of conjugated phenylene ethynlene oligomers to the Au surface. Self-assembled monolayers were formed ...

5. Fermi Level Alignment and Electronic Levels in Molecular Wire Self-Assembled Monolayers on Au
Published: 10/1/2004
Authors: Christopher D Zangmeister, Steven W Robey, Roger D van Zee, Yuxing Yao, J M Tour
Abstract: A combination of one- and two-photon photoelectron spectroscopies are used to determine the electronic structure around the Fermi level for self-assembled monolayers of a prototypical molecular wire , 4,4 -(ethynylphenyl)-1-benzenethiol (C6H5-CͰ ...

6. Valence Electron Orbitals of an Oligo(p-phenylene-ethynylene)thiol on Gold
Published: 3/1/2004
Authors: Christopher D Zangmeister, Steven W Robey, Roger D van Zee, Yuxing Yao, J M Tour
Abstract: One- and two-photon photoemission spectra have been measured for monolayers of oligo(para-phenylene-ethynylene) thiolate chemisorbed on gold surfaces. Within 5 eV of the Fermi level, four states are observed, two occupied (2.0 eV and 4.0 eV below th ...

7. Initial Etching of GaAs (001) During H^d2^ Plasma Cleaning
Published: 9/1/2000
Authors: Steven W Robey, K Sinniah
Abstract: The initial etching of GaAs(001) during remote H^d2^ plasma etching for oxide removal was examined using Atomic Force Microscopy (AFM), coupled with in situ Reflection High Energy Diffraction (RHEED) and Auger spectroscopy. Localized etching of the ...

8. Mg/GaAs(001): A Highly Anisotropic Reaction Morphology
Published: 12/31/1999
Author: Steven W Robey
Abstract: The spontaneous growth of one-dimensional structures during reaction of Mg on GaAs(001) 4x2 Ga-stabilized surface was observed by in situ electron diffraction and ex situ atomic force microscopy (AFM). Reaction led to growth of an epitaxial, cubic p ...

9. Anisotropic Microstructure Development During the Reaction of Mg With GaAs
Published: 2/18/1998
Author: Steven W Robey
Abstract: Reaction of Mg with GaAs (001) surface occurs at substrate temperatures above 250 K and leads to 3D growth of an epitaxial, cubic reaction phase with a lattice constant of 0.62 + 0.02nm, 9% larger than GaAs. The resulting anistotropic, 3-demiensiona ...

10. Interfacial Reaction Effects in the Growth of MgO on GaAs(001) by Reactive MBE
Published: 2/18/1998
Author: Steven W Robey

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