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. 2019 Mar 12;12(5):836. doi: 10.3390/ma12050836

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Applications of SFG spectroscopy to the study of the interactions of AuNPs with biological material in aqueous medium. (b) Effect of a total negative surface charge (SiO₂ and AuNPs) on the nanoparticle interaction with a model membrane (lipid bilayer) where no penetration is observed. (c) same as (b) but for positively charged AuNP surface. This time, the AuNPs crosses and distorts the lipid bilayer to reach the SiO₂ surface. Figure panel is reprinted (adapted) with permission from [74], copyright 2016 American Chemical Society.