Co-operativity in a nanocrystalline solid-state transition

Sarah L. White, Jeremy G. Smith, Mayank Behl, Prashant Jain

Research output: Contribution to journalArticle

Abstract

Co-operativity is a remarkable phenomenon mostly seen in biology, where initial reaction events significantly alter the propensity of subsequent reaction events, giving rise to a nonlinear tightly regulated synergistic response. Here we have found unique evidence of atomic level co-operativity in an inorganic material. A thousand-atom nanocrystal (NC) of the inorganic solid cadmium selenide exhibits strong positive co-operativity in its reaction with copper ions. A NC doped with a few copper impurities becomes highly prone to be doped even further, driving an abrupt transition of the entire NC to the copper selenide phase, as manifested by a strongly sigmoidal response in optical spectroscopy and electron diffraction measurements. The examples presented here suggest that cooperative phenomena may have an important role in the solid state, especially in the nucleation of new chemical phases, crystal growth, and other materials' transformations.

Original languageEnglish (US)
Article number2933
JournalNature communications
Volume4
DOIs
StatePublished - Dec 12 2013

Fingerprint

Nanoparticles
Nanocrystals
Copper
nanocrystals
solid state
copper selenides
cadmium selenides
copper
inorganic materials
Crystallization
biology
Electron diffraction
crystal growth
Spectrum Analysis
Nucleation
electron diffraction
nucleation
Electrons
Impurities
Ions

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Co-operativity in a nanocrystalline solid-state transition. / White, Sarah L.; Smith, Jeremy G.; Behl, Mayank; Jain, Prashant.

In: Nature communications, Vol. 4, 2933, 12.12.2013.

Research output: Contribution to journalArticle

White, Sarah L. ; Smith, Jeremy G. ; Behl, Mayank ; Jain, Prashant. / Co-operativity in a nanocrystalline solid-state transition. In: Nature communications. 2013 ; Vol. 4.
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