TY - JOUR
T1 - Enhancing rotational diffusion using oscillatory shear
AU - Leahy, Brian D.
AU - Cheng, Xiang
AU - Ong, Desmond C.
AU - Liddell-Watson, Chekesha
AU - Cohen, Itai
PY - 2013/5/29
Y1 - 2013/5/29
N2 - Taylor dispersion - shear-induced enhancement of translational diffusion - is an important phenomenon with applications ranging from pharmacology to geology. Through experiments and simulations, we show that rotational diffusion is also enhanced for anisotropic particles in oscillatory shear. This enhancement arises from variations in the particle's rotation (Jeffery orbit) and depends on the strain amplitude, rate, and particle aspect ratio in a manner that is distinct from the translational diffusion. This separate tunability of translational and rotational diffusion opens the door to new techniques for controlling positions and orientations of suspended anisotropic colloids.
AB - Taylor dispersion - shear-induced enhancement of translational diffusion - is an important phenomenon with applications ranging from pharmacology to geology. Through experiments and simulations, we show that rotational diffusion is also enhanced for anisotropic particles in oscillatory shear. This enhancement arises from variations in the particle's rotation (Jeffery orbit) and depends on the strain amplitude, rate, and particle aspect ratio in a manner that is distinct from the translational diffusion. This separate tunability of translational and rotational diffusion opens the door to new techniques for controlling positions and orientations of suspended anisotropic colloids.
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U2 - 10.1103/PhysRevLett.110.228301
DO - 10.1103/PhysRevLett.110.228301
M3 - Article
AN - SCOPUS:84878378002
SN - 0031-9007
VL - 110
JO - Physical review letters
JF - Physical review letters
IS - 22
M1 - 228301
ER -