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231224s2014 xx |||||o 00| ||eng c |
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|a 10.1021/la502971m
|2 doi
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|a eng
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| 100 |
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|a With, Sebastian
|e verfasserin
|4 aut
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| 245 |
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|a Fast diffusion-limited lyotropic phase transitions studied in situ using continuous flow microfluidics/microfocus-SAXS
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|c 2014
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a Date Completed 21.05.2015
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|a Date Revised 28.10.2014
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Fast concentration-induced diffusion-limited lyotropic phase transitions can be studied in situ with millisecond time resolution using continuous flow microfluidics in combination with microfocus small-angle X-ray scattering. The method was applied to follow a classical self-assembly sequence where amphiphiles assemble into micelles, which subsequently assemble into an ordered lattice via a disorder/order transition. As a model system we selected the self-assembly of an amphiphilic block copolymer induced by the addition of a nonsolvent. Using microchannel hydrodynamic flow-focusing, large concentration gradients can be generated, leading to a deep quench from the miscible to the microphase-separated state. Within milliseconds the block copolymers assembly via a spinodal microphase separation into micelles, followed by a disorder/order transition into an FCC liquid-crystalline phase with late-stage domain growth and shear-induced domain orientation into a mesocrystal. A comparison with a slow macroscopic near-equilibrium kinetic experiment shows that the fast structural transitions follow a direct pathway to the equilibrium structure without the trapping of metastable states
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|a Journal Article
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|a Trebbin, Martin
|e verfasserin
|4 aut
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|a Bartz, Christian B A
|e verfasserin
|4 aut
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|a Neuber, Christian
|e verfasserin
|4 aut
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| 700 |
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|a Dulle, Martin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yu, Shun
|e verfasserin
|4 aut
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1 |
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|a Roth, Stephan V
|e verfasserin
|4 aut
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|a Schmidt, Hans-Werner
|e verfasserin
|4 aut
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| 700 |
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|a Förster, Stephan
|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 30(2014), 42 vom: 28. Okt., Seite 12494-502
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|x 1520-5827
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| 773 |
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|g volume:30
|g year:2014
|g number:42
|g day:28
|g month:10
|g pages:12494-502
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