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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.8b01631
|2 doi
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|a pubmed24n0955.xml
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|a eng
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| 100 |
1 |
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|a Bi, Hongmei
|e verfasserin
|4 aut
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|a Impact of Electric Fields on the Nanoscale Behavior of Lipid Monolayers at the Surface of Graphite in Solution
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a Date Completed 05.10.2018
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|a Date Revised 05.10.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The nanoscale organization and dynamics of lipid molecules in self-assembled membranes is central to the biological function of cells and in the technological development of synthetic lipid structures as well as in devices such as biosensors. Here, we explore the nanoscale molecular arrangement and dynamics of lipids assembled in monolayers at the surface of highly ordered pyrolytic graphite (HOPG), in different ionic solutions, and under electrical potentials. Using a combination of atomic force microscopy and fluorescence recovery after photobleaching, we show that HOPG is able to support fully formed and fluid lipid membranes, but mesoscale order and corrugations can be observed depending on the type of the lipid considered (1,2-dioleoyl- sn-glycero-3-phosphocholine, 1,2-dioleoyl- sn-glycero-3-phospho-l-serine (DOPS), and 1,2-dioleoyl-3-trimethylammoniumpropane) and the ion present (Na+, Ca2+, Cl-). Interfacial solvation forces and ion-specific effects dominate over the electrostatic changes induced by moderate electric fields (±1.0 V vs Ag/AgCl reference electrode) with particularly marked effects in the presence of calcium, and for DOPS. Our results provide insights into the interplay between the molecular, ionic, and electrostatic interactions and the formation of dynamical ordered structures in fluid lipid membranes
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Wang, Xuejing
|e verfasserin
|4 aut
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|a Han, Xiaojun
|e verfasserin
|4 aut
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|a Voïtchovsky, Kislon
|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 34(2018), 32 vom: 14. Aug., Seite 9561-9571
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:34
|g year:2018
|g number:32
|g day:14
|g month:08
|g pages:9561-9571
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|u http://dx.doi.org/10.1021/acs.langmuir.8b01631
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