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Colloidal Particles Without Substrates

In the absence of a substrate, monodisperse colloidal particles confined to two dimensions form a triangular lattice while polydisperse colloidal particles adopt a disordered configuration. We study the heterogeneous or plastic motions that can arise when such ordered or disordered configurations are subjected to localized disturbances, which may take the form of a thermally activated defect, an individual driven particle, or several coupled or decoupled driven particles.

Papers:

1. Colloidal lattice shearing and rupturing with a driven line of particles
   A. Libal, B.M. Csiki, C.J. Olson Reichhardt, and C. Reichhardt
   Phys. Rev. E 87, 022308 (2013). arXiv

   
   

2. Defect dynamics: Breaking up in a curved plane
   C. Reichhardt and C.J. Olson Reichhardt
   Nature Mater. 11, 912 (2012).
   

   
   

3. Defect fluctuations and lifetimes in disordered Yukawa systems
   C. Reichhardt and C.J. Olson Reichhardt
   Phys. Rev. E 75, 051407 (2007). arXiv

   
   

4. Point-defect dynamics in two-dimensional colloidal crystals
   A. Libal, C. Reichhardt, and C.J. Olson Reichhardt
   Phys. Rev. E 75, 011403 (2007). arXiv

   
   

5. Cooperative behavior and pattern formation in mixtures of driven and nondriven colloidal assemblies
   C. Reichhardt and C.J. Olson Reichhardt
   Phys. Rev. E 74, 011403 (2006). arXiv

   
   

6. Crossover from intermittent to continuum dynamics for locally driven colloids
   C. Reichhardt and C.J. Olson Reichhardt
   Phys. Rev. Lett. 96, 028301 (2006). arXiv

   
   

7. Directional locking effects and dynamics for particles driven through a colloidal lattice
   C. Reichhardt and C.J. Olson Reichhardt
   Phys. Rev. E 69, 041405 (2004). arXiv

   
   

8. Local melting and drag for a particle driven through a colloidal crystal
   C. Reichhardt and C.J. Olson Reichhardt
   Phys. Rev. Lett. 92, 108301 (2004). arXiv

   
   

9. Depinning by fracture in a glassy background
   M.B. Hastings, C.J. Olson Reichhardt, and C. Reichhardt
   Phys. Rev. Lett. 90, 098302 (2003). arXiv
   

   
   

10. Fluctuating topological defects in 2D liquids: Heterogeneous motion and noise
    C. Reichhardt and C.J. Olson Reichhardt
    Phys. Rev. Lett. 90, 095504 (2003). arXiv