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Structural Characterization of Nanoparticle-Supported Lipid Bilayer Arrays by Grazing Incidence X-ray and Neutron Scattering
Malmö University, Faculty of Health and Society (HS), Department of Biomedical Science (BMV). Malmö University, Biofilms Research Center for Biointerfaces.ORCID iD: 0000-0003-3178-4867
Institut Laue-Langevin (ILL), Grenoble, France.
ISIS Neutron & Muon Source, STFC, Rutherford Appleton Laboratory, Harwell, Oxfordshir, U.K.
Malmö University, Faculty of Health and Society (HS), Department of Biomedical Science (BMV). Malmö University, Biofilms Research Center for Biointerfaces.
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2023 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 15, no 3, p. 3772-3780Article in journal (Refereed) Published
Abstract [en]

Arrays of nanoparticle-supported lipid bilayers (nanoSLB) are lipid-coated nanopatterned interfaces that provide a platform to study curved model biological membranes using surface-sensitive techniques. We combined scattering techniques with direct imaging, to gain access to sub-nanometer scale structural information on stable nanoparticle monolayers assembled on silicon crystals in a noncovalent manner using a Langmuir-Schaefer deposition. The structure of supported lipid bilayers formed on the nanoparticle arrays via vesicle fusion was investigated using a combination of grazing incidence X-ray and neutron scattering techniques complemented by fluorescence microscopy imaging. Ordered nanoparticle assemblies were shown to be suitable and stable substrates for the formation of curved and fluid lipid bilayers that retained lateral mobility, as shown by fluorescence recovery after photobleaching and quartz crystal microbalance measurements. Neutron reflectometry revealed the formation of high-coverage lipid bilayers around the spherical particles together with a flat lipid bilayer on the substrate below the nanoparticles. The presence of coexisting flat and curved supported lipid bilayers on the same substrate, combined with the sub-nanometer accuracy and isotopic sensitivity of grazing incidence neutron scattering, provides a promising novel approach to investigate curvature-dependent membrane phenomena on supported lipid bilayers.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2023. Vol. 15, no 3, p. 3772-3780
Keywords [en]
GISANS, GISAXS, membrane curvature, model membranes, nanoparticle-supported lipid bilayers, nanoSLB, neutron reflectometry
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:mau:diva-58543DOI: 10.1021/acsami.2c18956ISI: 000925320400001PubMedID: 36625710Scopus ID: 2-s2.0-85146341807OAI: oai:DiVA.org:mau-58543DiVA, id: diva2:1741309
Available from: 2023-03-03 Created: 2023-03-03 Last updated: 2023-10-09Bibliographically approved

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Paracini, NicolòGonzalez-Martinez, Juan FWaldie, SarahLarsson, JohanCárdenas, Marité

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