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Nanoscale structura...
Nanoscale structural and mechanical characterization of thin bicontinuous cubic phase lipid films
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- Ridolfi, Andrea (author)
- Center for Colloid and Surface Science (CSGI),CNR Institute of nanostructured materials (ISMN-CNR),University of Florence
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- Humphreys, Ben (author)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fysikalisk kemi,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,LINXS - Institute of advanced Neutron and X-ray Science,Other operations, LTH,Faculty of Engineering, LTH,Physical Chemistry,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Faculty of Engineering, LTH
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- Caselli, Lucrezia (author)
- University of Florence,Center for Colloid and Surface Science (CSGI)
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- Montis, Costanza (author)
- University of Florence,Center for Colloid and Surface Science (CSGI)
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- Nylander, Tommy (author)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fysikalisk kemi,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,LINXS - Institute of advanced Neutron and X-ray Science,Other operations, LTH,Faculty of Engineering, LTH,Physical Chemistry,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Faculty of Engineering, LTH
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- Berti, Debora (author)
- University of Florence,Center for Colloid and Surface Science (CSGI)
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- Brucale, Marco (author)
- Center for Colloid and Surface Science (CSGI),CNR Institute of nanostructured materials (ISMN-CNR)
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- Valle, Francesco (author)
- Center for Colloid and Surface Science (CSGI),CNR Institute of nanostructured materials (ISMN-CNR)
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- English.
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In: Colloids and Surfaces B: Biointerfaces. - : Elsevier BV. - 0927-7765. ; 210
- Related links:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The mechanical response of lipid membranes to nanoscale deformations is of fundamental importance for understanding how these interfaces behave in multiple biological processes; in particular, the nanoscale mechanics of non-lamellar membranes represents a largely unexplored research field. Among these mesophases, inverse bicontinuous cubic phase QII membranes have been found to spontaneously occur in stressed or virally infected cells and to play a role in fundamental processes, such as cell fusion and food digestion. We herein report on the fabrication of thin ( ̴150 nm) supported QII cubic phase lipid films (SQIIFs) and on their characterization via multiple techniques including Small Angle X-Ray Scattering (SAXS), Ellipsometry and Atomic Force Microscopy (AFM). Moreover, we present the first nanomechanical characterization of a cubic phase lipid membrane, through AFM-based Force Spectroscopy (AFM-FS). Our analysis reveals that the mechanical response of these architectures is strictly related to their topology and structure. The observed properties are strikingly similar to those of macroscopic 3D printed cubic structures when subjected to compression tests in material science; suggesting that this behaviour depends on the 3D organisation, rather than on the length-scale of the architecture. We also show for the first time that AFM-FS can be used for characterizing the structure of non-lamellar mesophases, obtaining lattice parameters in agreement with SAXS data. In contrast to classical rheological studies, which can only probe bulk cubic phase solutions, our AFM-FS analysis allows probing the response of cubic membranes to deformations occurring at length and force scales similar to those found in biological interactions.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Keyword
- Atomic force microscopy
- Cubic phase
- Mechanical properties
- Non-lamellar membranes
Publication and Content Type
- art (subject category)
- ref (subject category)
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