| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9577335 | Chemical Physics Letters | 2005 | 5 Pages |
Abstract
We report a combined shear small-angle neutron scattering (shear-SANS) and rheo-optical study of dilute aqueous suspensions of SWNT bundles dispersed using ionic surfactants. Both shear-SANS and flow birefringence reveal weak shear-induced alignment of SWNT bundles along the direction of flow. In terms of a nematic order parameter, the degree of alignment is found to increase with the shear rate, reaching ca. 0.08 at 2000Â sâ1. Addition of a soluble polymer to the SWNT suspensions diminishes shear-induced alignment. The factors limiting shear alignment in dilute SWNT suspensions are discussed.
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Authors
H. Wang, G.T. Christopherson, Z.Y. Xu, L. Porcar, D.L. Ho, D. Fry, E.K. Hobbie,