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231223s2006 xx ||||| 00| ||eng c |
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Xu, Hui
|e verfasserin
|4 aut
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| 245 |
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|a Flow-enhanced epitaxial ordering of brush-like macromolecules on graphite
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|c 2006
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|b nc
|2 rdacarrier
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| 500 |
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|a Date Completed 01.05.2007
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|a Date Revised 24.01.2006
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a Long-range orientational order in monolayers of brush-like macromolecules was achieved during spreading of a polymer melt on the surface of highly oriented pyrolytic graphite. The combination of wetting-induced flow and epitaxial adsorption of poly(n-butylacrylate) side chains on graphite led to the formation of large domains of uniaxially oriented rodlike molecules. The domain size varied from ca. 1 to 10 microm which is noticeably larger than the submicrometer-sized mosaic domains typically observed upon adsorption from solution. The increase in the degree of order is attributed to the flow-enhanced diffusion of the macromolecules within spreading monolayers which facilitates the epitaxial alignment of the large macromolecules. The diffusion coefficient was shown to increase linearly with the spreading rate. Even though the ordering occurred during flow, no correlation was observed between the molecular orientation and the flow direction. Thus, the role of the flow was not to induce the molecular orientation but to facilitate the intrinsic ordering process. This finding can inspire and lead to new strategies for constructing large scale ordered structures on surfaces
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|a Journal Article
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|a Sheiko, Sergei S
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shirvanyants, David
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Rubinstein, Michael
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Beers, Kathryn L
|e verfasserin
|4 aut
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| 700 |
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|a Matyjaszewski, Krzysztof
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 22(2006), 3 vom: 31. Jan., Seite 1254-9
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|x 1520-5827
|7 nnns
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| 773 |
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|g volume:22
|g year:2006
|g number:3
|g day:31
|g month:01
|g pages:1254-9
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