|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Computational Thermodynamics and Kinetics
||Piezoelectric Gold - Exploiting Mechano-Chemical Coupling at Interfaces for Designing Novel Functional Materials
||Charlotte Stenner, Anja Michl, Jörg Weissmüller
|On-Site Speaker (Planned)
The strong coupling between chemistry or electrochemistry and mechanics at interfaces may be exploited for designing materials with unexpected functional behavior. This is demonstrated by the remarkable observation that nanoporous-metal based hybrid materials behave similar to piezoe-lectric ceramics: Bodies of nanoporous gold impregnated with electrolyte emit exceptionally robust electric signals when subjected to external load. The metal-based material may thus be considered as piezoelectric, in a literal interpretation of the term. The cross-correlation between charge re-sponse to load and strain response to potential, as required by a phenomenological description of apparent piezoelectricity, is quantitatively satisfied. The local mechano-electric coupling at internal interfaces, which governs the effect, is well documented in experiment. Yet, a predictive under-standing of the quantum mechanical basis remains elusive. The talk will discuss the relevant issues in experiment and phenomenological thermodynamics, and will address the state-of-the-art in relation to density functional theory computation.
||Planned: Supplemental Proceedings volume