| Electrochemical preparation of pore wall modification gradients across thin porous silicon layers. | |
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MedLine Citation:
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PMID: 20218688 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Thin film porous silicon layers have been constructed in which the level of chemical modification to the pore walls is altered in a controlled gradient across the material. The gradient modification within such a nanoporous material represents a significant advance over gradients imposed across a flat surface. Gradients of methyl, pentyl acetate, and decyl groups are formed via electrochemical attachment of organohalides with an asymmetric electrode arrangement. The stability and hydrophobicity of the latter two systems have been improved through postprocess "end-capping" of the porous silicon with methyl groups. Two-dimensional mapping transmission FTIR microspectrophotometry and ATR-FTIR have been employed to characterize these new materials. Cleaving the surface-attached pentyl acetate groups to 5-hydroxypentyl groups leads to materials that can act as efficient visual indicators of the ethanol concentration in water over the range 1-10 vol %. |
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Authors:
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Corrina M Thompson; Michel Nieuwoudt; Anne M Ruminski; Michael J Sailor; Gordon M Miskelly |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Langmuir : the ACS journal of surfaces and colloids Volume: 26 ISSN: 1520-5827 ISO Abbreviation: Langmuir Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-05-12 Completed Date: 2010-08-17 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9882736 Medline TA: Langmuir Country: United States |
Other Details:
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Languages: eng Pagination: 7598-603 Citation Subset: - |
Affiliation:
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Department of Chemistry, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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