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 October 10, 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
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created December 31, 2005, Updated October 12, 2021