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231224s2011 xx |||||o 00| ||eng c |
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|a 10.1021/la2036983
|2 doi
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|a pubmed24n0708.xml
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|a (NLM)22007622
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Aissou, Karim
|e verfasserin
|4 aut
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|a Hexagonal-to-cubic phase transformation in composite thin films induced by FePt nanoparticles located at PS/PEO interfaces
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|c 2011
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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
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|2 rdacarrier
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|a Date Completed 27.03.2012
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|a Date Revised 01.12.2018
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2011 American Chemical Society
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|a The organization process of asymmetric poly(styrene-block-ethylene oxide) (PS-b-PEO) copolymer thin films blended with FePt nanoparticles is studied. In a first step, it is shown that FePt nanoparticles stabilized by oleic acid ligands are distributed within the PS matrix phase, whereas the same particles partially covered with short dopamine-terminated-methoxy poly(ethylene oxide) (mPEO-Dopa) are located at PS/PEO interfaces. The swelling of PS domains, induced by FePt_oleic acid nanoparticles during the solvent annealing process, results in formation of a disordered microstructure in comparison to the well-organized hexagonally close-packed (HCP) cylinder phase formed in the neat PS-b-PEO copolymer. The evolution of the microstructure of PS-b-PEO/FePt_mPEO-Dopa composite has been investigated for different solvent annealing treatments. Under high-humidity conditions during the vapor annealing process, the addition of FePt nanoparticles results in formation of spheres in the film split into terraces. The upper and lower terraces are occupied by spheres organized in an unusual square and HCP phases, respectively. Under low-humidity conditions, undulated PEO cylinders oriented parallel to substrate are formed in the presence of FePt nanoparticles. In this case, we observe that most of the nanoparticles accumulate within the core of topological defects, which induces a low nanoparticle concentration at the PS/PEO interfaces and so stabilizes an intermediate undulated cylinder phase
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Membranes, Artificial
|2 NLM
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|a Polystyrenes
|2 NLM
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|a Polyethylene Glycols
|2 NLM
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|a 3WJQ0SDW1A
|2 NLM
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|a Platinum
|2 NLM
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|a 49DFR088MY
|2 NLM
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|a Iron
|2 NLM
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|a E1UOL152H7
|2 NLM
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| 700 |
1 |
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|a Fleury, Guillaume
|e verfasserin
|4 aut
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1 |
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|a Pecastaings, Gilles
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Alnasser, Thomas
|e verfasserin
|4 aut
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1 |
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|a Mornet, Stéphane
|e verfasserin
|4 aut
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1 |
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|a Goglio, Graziella
|e verfasserin
|4 aut
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|a Hadziioannou, Georges
|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 27(2011), 23 vom: 06. Dez., Seite 14481-8
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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|g volume:27
|g year:2011
|g number:23
|g day:06
|g month:12
|g pages:14481-8
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|u http://dx.doi.org/10.1021/la2036983
|3 Volltext
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