Nonlinear microrheology of wormlike micelle solutions using ferromagnetic nanowire probes

@article{citeulike:2880973, abstract = {Ferromagnetic nanowires were employed to investigate the microrheology of wormlike micelle solutions composed of equimolar cetylpyridinium chloride\–sodium salicylate. For a wire rotated about a short axis, the drag at low rotation rate R is independent of R and strongly temperature dependent, consistent with the macroscopic shear viscosity. Above a critical rotation rate c, the drag is independent of temperature and decreases as a power law with increasing rate. The onset of nonlinear drag is characterized by a peak associated with contributions from extensional flow. Above c, the fluid generates an additional torque that tilts the wire out of regions of high shear flow and that is interpreted as a consequence of a shear-induced transition to nematic order among the micelles. Rotation of the wire in response to this torque reveals directly the anisotropy of the drag in the nonlinear state.}, author = {Cappallo, Nathan and Lapointe, Clayton and Reich, Daniel H. and Leheny, Robert L. }, citeulike-article-id = {2880973}, doi = {http://dx.doi.org/10.1103/PhysRevE.76.031505}, journal = {Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)}, keywords = {2007, experiment, micelle, microrheology, pre}, number = {3}, posted-at = {2008-06-10 22:33:11}, priority = {2}, publisher = {APS}, title = {Nonlinear microrheology of wormlike micelle solutions using ferromagnetic nanowire probes}, url = {http://dx.doi.org/10.1103/PhysRevE.76.031505}, volume = {76}, year = {2007} }

TY - JOUR ID - citeulike:2880973 L3 - citeulike-article-id:2880973 TI - Nonlinear microrheology of wormlike micelle solutions using ferromagnetic nanowire probes JF - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) VL - 76 IS - 3 PB - APS N2 - Ferromagnetic nanowires were employed to investigate the microrheology of wormlike micelle solutions composed of equimolar cetylpyridinium chloride–sodium salicylate. For a wire rotated about a short axis, the drag at low rotation rate R is independent of R and strongly temperature dependent, consistent with the macroscopic shear viscosity. Above a critical rotation rate c, the drag is independent of temperature and decreases as a power law with increasing rate. The onset of nonlinear drag is characterized by a peak associated with contributions from extensional flow. Above c, the fluid generates an additional torque that tilts the wire out of regions of high shear flow and that is interpreted as a consequence of a shear-induced transition to nematic order among the micelles. Rotation of the wire in response to this torque reveals directly the anisotropy of the drag in the nonlinear state. KW - 2007 KW - experiment KW - micelle KW - microrheology KW - pre AU - Cappallo, Nathan AU - Lapointe, Clayton AU - Reich, Daniel AU - Leheny, Robert PY - 2007/// UR - http://dx.doi.org/10.1103/PhysRevE.76.031505 ER -