Acoustic Emission from Organic Martensites

Manas K. Panda, Martin Etter, Robert E. Dinnebier, Pance Naumov

Research output: Contribution to journalArticle

Abstract

In salient effects, still crystals of solids that switch between phases acquire a momentum and are autonomously propelled because of rapid release of elastic energy accrued during a latent structural transition induced by heat, light, or mechanical stimulation. When mechanical reconfiguration is induced by change of temperature in thermosalient crystals, bursts of detectable acoustic waves are generated prior to self-actuation. These observations provide compelling evidence that the thermosalient transitions in organic and organic-containing crystals are molecular analogues of the martensitic transitions in some metals, and metal alloys such as steel and shape-memory alloys. Within a broader context, these results reveal that, akin to metallic bonding, the intermolecular interactions in molecular solids are capable of gradual accrual and sudden release of a substantial amount of strain during anisotropic thermal expansion, followed by a rapid transformation of the crystal packing in a diffusionless, non-displacive transition.

Original languageEnglish (US)
Pages (from-to)8104-8109
Number of pages6
JournalAngewandte Chemie - International Edition
Volume56
Issue number28
DOIs
StatePublished - Jan 1 2017

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Keywords

  • acoustic emissions
  • martensitic phase transitions
  • mechanical effects
  • organic crystals
  • thermosalient effects

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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