| Structure of submonolayer oleic acid coverages on inorganic aerosol particles: evidence of island formation. | |
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MedLine Citation:
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PMID: 18688381 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A series of submonolayer deposition studies of oleic acid on both hydrophobic and hydrophilic surfaces has shown that oleic acid self-associates into islands rather than uniformly covering the surfaces. The studies were performed by vapor deposition on 1.6 mum diameter polystyrene aerosol particles as well as on polystyrene and silica surfaces. The surfaces were investigated by scanning electron microscopy (SEM), atomic force microscopy (AFM), ellipsometry and contact-angle goniometry. After timescales of minutes to hours of vapor deposition at 70 degrees C, the oleic acid arranged itself in the form of islands with diameters of about 100 nm. Many of the islands are 25-30 A high, suggesting that the oleic acid sits vertically on the surface. The surface structure of oleic acid on particles is expected to impact on several atmospherically relevant properties such as the reactivity of the oleic acid and the hygroscopicity of the particles. |
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Authors:
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Eva R Garland; Elias P Rosen; Laura I Clarke; Tomas Baer |
Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. Date: 2008-04-14 |
Journal Detail:
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Title: Physical chemistry chemical physics : PCCP Volume: 10 ISSN: 1463-9076 ISO Abbreviation: Phys Chem Chem Phys Publication Date: 2008 Jun |
Date Detail:
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Created Date: 2008-08-08 Completed Date: 2008-11-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100888160 Medline TA: Phys Chem Chem Phys Country: England |
Other Details:
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Languages: eng Pagination: 3156-61 Citation Subset: IM |
Affiliation:
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Chemistry Department, University of North Carolina, Chapel Hill, NC 27599-3290, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aerosols
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chemistry Inorganic Chemicals / chemistry* Microscopy, Atomic Force Microscopy, Electron, Scanning Oleic Acid / chemistry* Particle Size Silicon Dioxide / chemistry Surface Properties |
| Chemical | |
Reg. No./Substance:
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0/Aerosols; 0/Inorganic Chemicals; 112-80-1/Oleic Acid; 7631-86-9/Silicon Dioxide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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