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- W3215723013 abstract "ABSTRACT The control of the aggregation of biomedical nanoparticles (NP) in physiological conditions is crucial as clustering may change completely the way they interact with the biological environment. Here we show that Au nanoparticles, functionalized by an anionic, amphiphilic shell, spontaneously aggregate in fluid zwitterionic lipid bilayers. We use Molecular Dynamics and enhanced sampling techniques to disentangle the short-range and long-range driving forces of aggregation. At short inter-particle distances, ion-mediated, charge-charge interactions (ion bridging) stabilize the formation of large NP aggregates, as confirmed by cryo-electron microscopy. Lipid depletion and membrane curvature are the main membrane deformations driving long-range NP-NP attraction. Ion bridging, lipid depletion, and membrane curvature stem from the configurational flexibility of the nanoparticle shell. Our simulations show, more in general, that the aggregation of same-charge membrane inclusions can be expected as a result of intrinsically nanoscale effects taking place at the NP-NP and NP-bilayer soft interfaces." @default.
- W3215723013 created "2021-12-06" @default.
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- W3215723013 date "2021-11-22" @default.
- W3215723013 modified "2023-10-01" @default.
- W3215723013 title "Ions and lipids drive aggregation of surface-functionalized gold nanoparticles on lipid membranes" @default.
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- W3215723013 doi "https://doi.org/10.1101/2021.11.22.468803" @default.
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