A New Method of Preparing Monolayers on Silicon and Patterning Silicon Surfaces by Scribing in the Presence of Reactive Species
| Autor: | Michael Dorff, Travis L. Niederhauser, Adam T. Woolley, Yit-Yian Lua, Matthew R. Linford, David A. Berges, Matthew C. Asplund, Guilin Jiang |
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| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
Materials science Silicon technology industry and agriculture chemistry.chemical_element Surfaces and Interfaces Condensed Matter Physics Polyelectrolyte Secondary ion mass spectrometry Chemical engineering X-ray photoelectron spectroscopy chemistry Covalent bond Monolayer Electrochemistry Organic chemistry General Materials Science Wetting Spectroscopy Alkyl |
| Zdroj: | Langmuir. 17:5889-5900 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | Here we describe a new and simple method for preparing alkyl monolayers on silicon, which consists of mechanically scribing oxide-coated silicon while it is wet with 1-alkenes or 1-alkynes (neat or in inert solvents) under ambient conditions. X-ray photoelectron spectroscopy, time-of-flight secondary ion mass spectrometry, wetting data, and stability tests suggest covalent bonding of unsaturated species to exposed silicon surfaces. Enclosures (hydrophobic corrals) made by scribing silicon that is wet with unsaturated hydrophobic species hold droplets of water and liquids with substantially lower surface tensions. Wetting tests suggest that 1-alkynes make better hydrophobic corrals than 1-alkenes, and theoretical results suggest it should be more difficult for alkyl chains of chemisorbed 1-alkenes to pack than those of 1-alkynes. Underivatized interior regions of hydrophobic corrals are functionalized with polyelectrolyte multilayers. Theoretical energies for water and methanol droplets (gravitational and surface) in hydrophobic corrals are calculated, and a model of failure of liquid droplets in hydrophobic corrals is presented. |
| Databáze: | OpenAIRE |
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