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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1021/la9046337
|2 doi
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|a pubmed24n0657.xml
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|a (DE-627)NLM197139396
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|a (NLM)20369866
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Lock, Evgeniya H
|e verfasserin
|4 aut
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| 245 |
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|a Surface composition, chemistry, and structure of polystyrene modified by electron-beam-generated plasma
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 08.09.2010
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|a Date Revised 26.05.2010
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|a published: Print
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|a Citation Status MEDLINE
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|a Polystyrene (PS) surfaces were treated by electron-beam-generated plasmas in argon/oxygen, argon/nitrogen, and argon/sulfur hexafluoride environments. The resulting modifications of the polymer surface energy, morphology, and chemical composition were analyzed by a suite of complementary analytical techniques: contact angle goniometry, atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and reflection electron energy loss spectroscopy (REELS). The plasma treatments produced only minimal increases in the surface roughness while introducing the expected chemical modifications: oxygen-based after Ar/O(2) plasma, oxygen- and nitrogen-based after Ar/N(2) plasma, and fluorine-based after Ar/SF(6) plasma. Fluorinated PS surfaces became hydrophobic and did not significantly change their properties over time. In contrast, polymer treated in Ar/O(2) and Ar/N(2) plasmas initially became hydrophilic but underwent hydrophobic recovery after 28 days of aging. The aromatic carbon chemistry in the top 1 nm of these aged surfaces clearly indicated that the hydrophobic recovery was produced by reorientation/diffusion of undamaged aromatic polymer fragments from the bulk rather than by contamination. Nondestructive depth profiles of aged plasma-treated PS films were reconstructed from parallel angle-resolved XPS (ARXPS) measurements using a maximum-entropy algorithm. The salient features of reconstructed profiles were confirmed by sputter profiles obtained with 200 eV Ar ions. Both types of depth profiles showed that the electron-beam-generated plasma modifications are confined to the topmost 3-4 nm of the polymer surface, while valence band measurements and unsaturated carbon signatures in ARXPS and REELS data indicated that much of the PS structure was preserved below 9 nm
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Polystyrenes
|2 NLM
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1 |
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|a Petrovykh, Dmitri Y
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mack, Paul
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Carney, Tim
|e verfasserin
|4 aut
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| 700 |
1 |
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|a White, Richard G
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Walton, Scott G
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Fernsler, Richard F
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 26(2010), 11 vom: 01. Juni, Seite 8857-68
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:26
|g year:2010
|g number:11
|g day:01
|g month:06
|g pages:8857-68
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|u http://dx.doi.org/10.1021/la9046337
|3 Volltext
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