Olefin metathesis reaction on GaN (0001) surfaces
| Autor: | Dmitry Zemlyanov, Matthew S. Makowski, Albena Ivanisevic |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Olefin fiber Hydrogen Alkene Heteroatom Inorganic chemistry Gallium nitride X-ray photoelectron spectroscopy Olefin metathesis RAY PHOTOELECTRON-SPECTROSCOPY SELF-ASSEMBLED MONOLAYERS FIELD-EFFECT TRANSISTORS GALLIUM NITRIDE THIN-FILMS ACID ADSORPTION GAN(0001) LAYERS XPS Grignard reaction General Physics and Astronomy chemistry.chemical_element Surfaces and Interfaces General Chemistry Condensed Matter Physics Chemical reaction Surfaces Coatings and Films Nanoscience and Nanotechnology Contact angle chemistry.chemical_compound chemistry |
| Zdroj: | Birck and NCN Publications |
| Popis: | Proof-of-concept reactions were performed on GaN (0001) surfaces to demonstrate surface termination with desired chemical groups using an olefin cross-metathesis reaction. To prepare the GaN surfaces for olefin metathesis, the surfaces were hydrogen terminated with hydrogen plasma, chlorine terminated with phosphorous pentachloride, and then terminated with an alkene group via a Grignard reaction. The olefin metathesis reaction then bound 7-bromo-1-heptene. The modified surfaces were characterized by X-ray photoelectron spectroscopy (XPS), atomic force microscopy, and water contact angle measurements following each step in the reaction scheme. The XPS data was used to qualitatively identify surface chemical species and to quantitatively determine molecular surface coverage. The bromine atom in 7-bromo-1-heptene served as a heteroatom for identification with XPS. The reaction scheme resulted in GaN substrates with a surface coverage of 0.10 monolayers and excellent stability towards oxidation when exposed to oxygen plasma. (C) 2010 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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