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http://hdl.handle.net/1942/21145
Title: | Ionic strength dependent vesicle adsorption and phase behavior of anionic phospholipids on a gold substrate | Authors: | PRAMANIK, Sumit SENECA, Senne ETHIRAJAN, Anitha NEUPANE, Shova RENNER, Frank LOSADA-PEREZ, Patricia |
Issue Date: | 2016 | Source: | Biointerphases, 11 (1) | Abstract: | The authors report on the effect of ionic strength on the formation of supported vesicle layers of anionic phospholipids 1,2-dimyristoyl-sn-glycero-3-phospho-rac-glycerol (DMPG) and dimyristoylphosphatidylserine (DMPS) onto gold. Using quartz crystal microbalance with dissipation monitoring the authors show that vesicleadsorption is mainly governed by NaCl concentration, reflecting the importance of electrostatic interactions in anionic lipids, as compared to zwitterionic 1,2-dimyristoyl-sn-glycero-3-phosphocholine. At low ionic strength, low or no adsorption is observed as a result of vesicle–vesicle electrostatic repulsion. At medium ionic strength, the negative charges of DMPG and DMPS are screened resulting in larger adsorption and a highly dissipative intact vesicle layer. In addition, DMPS exhibits a peculiar behavior at high ionic strength that depends on the temperature of the process. | Notes: | Losada-Perez, P (reprint author), Hasselt Univ, Inst Mat Res IMO, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. patricia.losadaperez@uhasselt.be | Document URI: | http://hdl.handle.net/1942/21145 | ISSN: | 1934-8630 | e-ISSN: | 1559-4106 | DOI: | 10.1116/1.4939596 | ISI #: | 000374982200028 | Rights: | © 2016 American Vacuum Society | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2017 |
Appears in Collections: | Research publications |
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File | Description | Size | Format | |
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Ionic_strength_dependent_vesicle_adsorpt.pdf Restricted Access | Published version | 2.52 MB | Adobe PDF | View/Open Request a copy |
Biointerphases.pdf | Peer-reviewed author version | 1.13 MB | Adobe PDF | View/Open |
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