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231223s2006 xx ||||| 00| ||eng c |
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|a (NLM)17154631
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a Li, Guangfen
|e verfasserin
|4 aut
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|a Microstructures by solvent drop evaporation on polymer surfaces
|b dependence on molar mass
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|c 2006
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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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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 26.01.2007
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|a Date Revised 22.06.2007
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|a published: Print
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|a ErratumIn: Langmuir. 2007 Jun 5;23(12):6869
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|a Citation Status PubMed-not-MEDLINE
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|a When a solvent drop evaporates from a polymer surface, it leaves behind a characteristic structure, typically a crater. We deposited toluene drops with a microsyringe onto planar polystyrene (PS) surfaces and analyzed the surface topography after drying. For low molar mass PS (Mw = 20.9-24.3 kDa) dotlike protrusions with a ridge at the periphery formed on the polymer surface. With increasing molar mass the central region decreased in height. At Mw = 29.6-643 kDa a craterlike structure with a depression in the center and a ridge was observed. At even higher molar mass, irregular structures without rotational symmetry occurred. We explain the observed dependence on the molar mass with a different degree of entanglement, leading to different dissolution rates and different diffusion constants
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|a Journal Article
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|a Butt, Hans-Jürgen
|e verfasserin
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|a Graf, Karlheinz
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 22(2006), 26 vom: 19. Dez., Seite 11395-9
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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|g volume:22
|g year:2006
|g number:26
|g day:19
|g month:12
|g pages:11395-9
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|d 22
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|e 26
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|h 11395-9
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