Fry, D.
, Langhorst, B.
, Wang, H.
, Bauer, B.
and Hobbie, E.
(2006),
Rheo-Optic Studies of Carbon Nanotube Suspensions, Journal of Chemical Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852402
(Accessed July 19, 2024)
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Rheo-Optic Studies of Carbon Nanotube Suspensions
Published
Author(s)
D J. Fry, B Langhorst, , ,
Abstract
We have used a polarization modulation technique to investigate optical anisotropy of multi-walled and single-walled carbon nanotubes suspended in a variety of solvents. Measurement of birefringence and dichroism have been performed as a function of shear rate and tube concentration. Both increase with increasing shear rate as a result of enhanced flow alignment and also with increasing tube concentration at fixed shear. There does not appear to be a simple scaling between the tube volume fraction and the magnitude of optical anisotropy, implying a rather complex behavior of these suspensions. By considering the rotary tube diffusivity as a function of tube length and diameter, solvent viscosity and tube concentration we have found a universal scaling for both the birefringence and dichroism with rotary Peclet number.Citation
Journal of Chemical Physics
Volume
124
Pub Type
Journals
Download Paper
Keywords
birefringence, dichroism, nanotubes
Citation
Issues
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Created December 31, 2005, Updated October 12, 2021