Multiscale modeling of charge-induced deformation of nanoporous gold structures

S. S. R. Saane, K.R. Mangipudi, K. U. Loos, J. Th. M. De Hosson, P. R. Onck*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

36 Citaten (Scopus)

Samenvatting

Recent experimental studies have shown that nanoporous metals undergo dimensional changes when a potential difference is applied in an electrochemical environment. The primary actuation mechanism is the electric-double layer charging of the internal surface in combination with a large surface-to-volume-ratio. To account for the excess charge we have developed an atomistic model that is calibrated to density functional theory. To make a scale transition from the atomistic to the continuum scale, we propose a surface layer model that is informed by atomistic simulations. We use this multiscale approach to study the charge-induced actuation response of ordered (cubic lattices and gyroids) and disordered nanoporous gold (npg) architectures. Results are presented in terms of the charge-induced actuation strain and work density as a function of relative density, ligament size and architectural morphology. The differences between ordered and disordered structures are critically addressed. (C) 2014 Elsevier Ltd. All rights reserved.

Originele taal-2English
Pagina's (van-tot)1-15
Aantal pagina's15
TijdschriftJournal of the Mechanics and Physics of Solids
Volume66
DOI's
StatusPublished - mei-2014

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