Cell-inspired, massive electromodulation of friction via transmembrane fields across lipid bilayers
Source abstract
Abstract
Transient electric fields across cell bilayer membranes can lead to electroporation and cell fusion, effects crucial to cell viability whose biological implications have been extensively studied. However, little is known about these behaviours in a materials context. Here we find that transmembrane electric fields can lead to a massive, reversible modulation of the sliding friction between surfaces coated with lipid-bilayer membranes-a 200-fold variation, up to two orders of magnitude greater than that achieved to date. Atomistic simulations reveal that the transverse fields, resembling those at cell membranes, lead to fully reversible electroporation of the confined bilayers and the formation of inter-bilayer bridges analogous to the stalks preceding intermembrane fusion. These increase the interfacial dissipation through reduced hydration at the slip plane, forcing it to revert in part from the low-dissipation, hydrated lipid-headgroup plane to the intra-bilayer, high-dissipation acyl tail interface. Our results demonstrate that lipid bilayers under transmembrane electric fields can have striking materials modification properties.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microbial Inactivation Methods · Microfluidic and Bio-sensing Technologies · Planarian Biology and Electrostimulation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (77)
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