Kuei, SteveGarza, BurkeBiswal, Sibani Lisa2017-11-152017-11-152017Kuei, Steve, Garza, Burke and Biswal, Sibani Lisa. "From strings to coils: Rotational dynamics of DNA-linked colloidal chains." <i>Physical Review Fluids,</i> 2, no. 10 (2017) American Physical Society: https://doi.org/10.1103/PhysRevFluids.2.104102.https://hdl.handle.net/1911/98828We investigate the dynamical behavior of deformable filaments experimentally using a tunable model system consisting of linked paramagnetic colloidal particles, where the persistence length lp, the contour length lc, and the strength and frequency of the external driving force are controlled. We find that upon forcing by an external magnetic field, a variety of structural and conformational regimes exist. Depending on the competition of forces and torques on the chain, we see classic rigid rotator behavior, as well as dynamically rich wagging, coiling, and folding behavior. Through a combination of experiments, computational models, and theoretical calculations, we are able to observe, classify, and predict these dynamics as a function of the dimensionless Mason and magnetoelastic numbers.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlePhysRevFluids.2.104102https://doi.org/10.1103/PhysRevFluids.2.104102