Analysis of the Surface Coverage of a Self-Assembled Monolayer of Octadecyl Silane on a Si(100) Surface by Infrared External-Reflection Spectroscopy
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- NORIMOTO Shingo
- Laboratory of Solution and Interface Chemistry, Division of Environmental Chemistry, Institute for Chemical Research, Kyoto University
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- MORIMINE Seiya
- Laboratory of Solution and Interface Chemistry, Division of Environmental Chemistry, Institute for Chemical Research, Kyoto University
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- SHIMOAKA Takafumi
- Laboratory of Solution and Interface Chemistry, Division of Environmental Chemistry, Institute for Chemical Research, Kyoto University
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- HASEGAWA Takeshi
- Laboratory of Solution and Interface Chemistry, Division of Environmental Chemistry, Institute for Chemical Research, Kyoto University
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Abstract
The coverage of a self-assembled monolayer (SAM) of octadecyl silane on a silicon surface is analyzed by infrared external-reflection spectrometry via molecular orientation analysis. A commercially available octadecyl trimethoxy silane (ODS) solution is employed, which readily reacts with an oxidized surface of Si(100) prepared by a UV/ozone treatment in an ambient condition to yield a highly reproducible SAM. With the present technique, a very flat surface with no holes is obtained in the entire area of the SAM. IR external-reflection spectra of the SAM apparently indicate that the alkyl chains are highly ordered having the all-trans zigzag conformation, and the molecular orientation agrees with that of a Langmuir–Blodgett (LB) monolayer film of octadecanoic acid. Since the orientation analysis is based on an assumption that the surface is fully covered by the SAM as the LB film, the agreement of the orientation confirms that the surface coverage of the present SAM on Si(100) is on the same level as the LB film.
Journal
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- Analytical Sciences
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Analytical Sciences 29 (10), 979-984, 2013
The Japan Society for Analytical Chemistry
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Details 詳細情報について
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- CRID
- 1390282679236699520
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- NII Article ID
- 10031202858
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- NII Book ID
- AA10500785
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- COI
- 1:STN:280:DC%2BC2c%2FmsVGrtQ%3D%3D
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- ISSN
- 13482246
- 09106340
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- NDL BIB ID
- 024914000
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- PubMed
- 24107563
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed