Levich Institute Seminar – Tuesday, 02/15/2022

Tuesday, 02/15/2022
2:00 PM
Zoom Link:  https://ccny.zoom.us/j/87828028887

Professor Yael Roichman
Tel Aviv University, School of Chemistry

“Signatures of Non-Equilibrium in Optically Driven Dense Colloidal Suspensions”



We use holographic optical tweezers to drive locally a quasi-2D colloidal suspension.

As a result, the colloidal suspension experiences a smooth transition from strong driving to very week driving as the distance from the location of driving increases. At steady state, this gives rise to  a non-uniform density distribution. We find that this density profile is a result of a competition between pressure induced by normal forces due to shear and osmotic pressure. We then use this system to study Signatures of non-equilibrium such as entropy production as a function of driving strength.

  • 2004 PhD physics Technion
  • 2004-2008 Postdoc NYU with David G. Grier
  • 2008-  School of Chemistry, Tel Aviv University
  • 2019- School of Physics & Astronomy, Tel Aviv University

Non-equilibrium statistical mechanics, soft matter and microrheology, anomalous diffusion, optical trapping and imaging.

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