Solid-state nanopores are a promising platform for characterizing proteins. In order to improve their lifetime and prevent fouling, Polyethylene Glycol (PEG) grafting is one of the most efficient and low-cost solutions. Different models to calculate the PEG thickness do not consider their interaction with the nanopore inner surface nor the effect of confinement. Here, we investigate by molecular dynamic simulation the PEG conformation inside a nanopore in the case of hydrophobic and hydrophilic nanopores. Our results reveal that the nanopore inner surface plays a role in the PEG organization and, thus, in the speed of the salt constituent. The resulting pair interaction between PEG and its environment clearly shows a more important affinity for K+ compared to Li+ cations.
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14 March 2021
Research Article|
March 08 2021
Impact of surface state on polyethylene glycol conformation confined inside a nanopore
Special Collection:
Fluids in Nanopores
Nicolas Arroyo;
Nicolas Arroyo
1
Laboratoire de Nanomédecine, Imagerie et Thérapeutique, EA4662, Université Bourgogne-Franche-Comté (UFR Sciences et Techniques), Centre Hospitalier Universitaire de Besançon
, 16 route de Gray, 25030 Besançon, France
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Sebastien Balme
;
Sebastien Balme
a)
2
Institut Européen des Membranes, UMR5635 UM ENCSM CNRS
, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
a)Authors to whom correspondence should be addressed: sebastien.balme@umontpellier.fr and fabien.picaud@univ-fcomte.fr
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Fabien Picaud
Fabien Picaud
a)
1
Laboratoire de Nanomédecine, Imagerie et Thérapeutique, EA4662, Université Bourgogne-Franche-Comté (UFR Sciences et Techniques), Centre Hospitalier Universitaire de Besançon
, 16 route de Gray, 25030 Besançon, France
a)Authors to whom correspondence should be addressed: sebastien.balme@umontpellier.fr and fabien.picaud@univ-fcomte.fr
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a)Authors to whom correspondence should be addressed: sebastien.balme@umontpellier.fr and fabien.picaud@univ-fcomte.fr
Note: This paper is part of the JCP Special Topic on Fluids in Nanopores.
J. Chem. Phys. 154, 104901 (2021)
Article history
Received:
December 10 2020
Accepted:
February 17 2021
Citation
Nicolas Arroyo, Sebastien Balme, Fabien Picaud; Impact of surface state on polyethylene glycol conformation confined inside a nanopore. J. Chem. Phys. 14 March 2021; 154 (10): 104901. https://doi.org/10.1063/5.0040170
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