Direct observation of impact propagation and absorption in dense colloidal monolayers

  title={Direct observation of impact propagation and absorption in dense colloidal monolayers},
  author={I. Buttinoni and Jinwoong Cha and Wei-Hsun Lin and S. Job and C. Daraio and L. Isa},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  pages={12150 - 12155}
  • I. Buttinoni, Jinwoong Cha, +3 authors L. Isa
  • Published 2017
  • Materials Science, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
Significance Single-particle characterization of the impact response has unveiled design principles to focus and control stress propagation in macroscopic granular crystalline arrays. We demonstrate that similar principles apply to aqueous monolayers of microparticles excited by localized mechanical pulses. By inducing extreme local deformation rates and tracking the motion of each particle with velocities that reach up to few meters per second, we reveal that a regime of elastic collisions… Expand
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