Derek Hammar

ORCID: 0009-0006-6507-6163
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About
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Research Areas
  • Micro and Nano Robotics
  • Modular Robots and Swarm Intelligence
  • Advanced Materials and Mechanics
  • Nonlinear Dynamics and Pattern Formation
  • Advanced Semiconductor Detectors and Materials
  • Radiation Detection and Scintillator Technologies
  • Slime Mold and Myxomycetes Research
  • Digital Radiography and Breast Imaging

University of California, Merced
2024

This work examines self-mixing in active nematics, a class of fluids which mobile topological defects drive chaotic flows system comprised biological filaments and molecular motors. We present experiments that demonstrate how geometrical confinement can influence the braiding dynamics defects. Notably, we show cardioid-shaped wells leads to realization golden braid, maximally efficient mixing state exactly three with no defect creation or annihilation. characterize braid using different...

10.1103/physrevlett.132.228301 article EN Physical Review Letters 2024-05-28

The formation of biopolymer-based active phases has become an important technique for researchers interested in exploring the emerging field liquid crystals and their possible roles cell biology. These novel systems consist self-driven sub-units that consume energy locally, producing out-of-equilibrium dynamic fluid. To form crystal phase described this report, purified protein components including biopolymers molecular motors are combined, nematic spontaneously forms presence adenosine...

10.3791/64287 article EN Journal of Visualized Experiments 2023-01-13

The formation of biopolymer-based active phases has become an important technique for researchers interested in exploring the emerging field liquid crystals and their possible roles cell biology. These novel systems consist self-driven sub-units that consume energy locally, producing out-of-equilibrium dynamic fluid. To form crystal phase described this report, purified protein components including biopolymers molecular motors are combined, nematic spontaneously forms presence adenosine...

10.3791/64287-v article EN Journal of Visualized Experiments 2023-01-13

This work examines self-mixing in active nematics, a class of fluids which mobile topological defects drive chaotic flows system comprised biological filaments and molecular motors. We present experiments that demonstrate how geometrical confinement can influence the braiding dynamics defects. Notably, we show cardioid-shaped wells leads to realization golden braid, maximally efficient mixing state exactly three with no defect creation or annihilation. characterize braid using different...

10.48550/arxiv.2401.04363 preprint EN cc-by arXiv (Cornell University) 2024-01-01
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