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Non-Reciprocal Interactions Induced by Water in Confinement by Jimenez-Angeles, Felipe; Harmon, Katherine J.; Nguyen, Trung Dac; Fenter, Paul; de la Cruz, Monica Olvera is a scholarly article available to read on EtoBox.

What is Non-Reciprocal Interactions Induced by Water in Confinement about?

Water mediates electrostatic interactions via the orientation of its dipoles around ions, molecules, and interfaces. This induced water polarization consequently influences multiple phenomena. In particular, water polarization modulated by nanoconfinement affects ion adsorption and transport, biomolecular self-assembly, and surface chemical reactions. Therefore, it is of paramount importance to understand how water-mediated interactions change at the nanoscale. Here we show that near the graphene surface anion-cation interactions do not obey the translational and isotropic symmetries of Coulomb's law. We identify a new property, referred to as non-reciprocity, which describes the non-equivalent and directional interaction between two oppositely charged ions near the confining surface when their positions with respect to the interface are exchanged. Specifically, upon exchange of the two ions' positions along the surface normal direction the interaction energy changes by about 5$k_BT$. In both cases, confinement enhances the attraction between two oppositely charged ions near the graphene surface, while intercalation of one ion into the graphene layers shifts the interaction to repu

Author

Jimenez-Angeles, Felipe; Harmon, Katherine J.; Nguyen, Trung Dac; Fenter, Paul; de la Cruz, Monica Olvera

Published

2020

Language

EN