What Drives Deformation of Smart Nanoporous Materials During Adsorption and Electrosorption?

Document Type

Article

Publication Date

8-6-2024

Abstract

Nanoporous solids have high surface area, so processes at the surface affect the sample as a whole. When guest species adsorb in nanopores, be they molecules adsorbing from the gas phase, or ions adsorbing from solution, they cause material deformation. While often undesired, adsorption- or electrosorption-induced deformation provides a potential for nanoporous materials to be used as actuators. Progress in this direction requires understanding the mechanisms of adsorption- or electrosorption-induced deformation. These two processes are rarely discussed together, and this Perspective aims to fill this gap to some extent, focusing on driving forces for both processes. Typically the main driving force for both is the solvation (disjoining) pressure, acting normally to the pore walls. However, in some cases, solvation pressure is not sufficient to describe the effects even qualitatively. We highlight examples in which the surface stress acting along the solid surface is an additional driving force for deformation.

Identifier

85199323041 (Scopus)

Publication Title

Langmuir

External Full Text Location

https://doi.org/10.1021/acs.langmuir.4c00443

e-ISSN

15205827

ISSN

07437463

PubMed ID

39037749

First Page

15949

Last Page

15956

Issue

31

Volume

40

Grant

CBET-1944495

Fund Ref

National Science Foundation

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