Hwang, Jeong-Yuan and Nish, Adrian and Doig, James and Douven, Sigrid and Chen, Chun-Wei and Chen, Li-Chyong and Nicholas, Robin J. (2008) Polymer structure and solvent effects on the selective dispersion of single-walled carbon nanotubes. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 130 (11). pp. 3543-3553.
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Official URL: http://pubs.acs.org/doi/abs/10.1021/ja0777640
Combinations of different aromatic polymers and organic solvents have been studied as dispersing agents for preparing single-walled carbon nanotubes solutions, using optical absorbance, photoluminescence-excitation mapping, computer modeling, and electron microscopic imaging to characterize the solutions. Both the polymer structure and solvent used strongly influence the dispersion of the nanotubes, leading in some cases to very high selectivity in terms of diameter and chiral angle. The highest selectivities are observed using toluene with the rigid polymers PFO-BT and PFO to suspend isolated nanotubes. The specific nanotube species selected are also dependent on the solvent used and can be adjusted by the use of THF or xylene. Where the structure has more flexible conformations, the polymers are shown to be less selective but show an enhanced overall solubilization of nanotube material. When chloroform is used as the solvent, there is a large increase in the overall solubilization, but the nanotubes are suspended as bundles rather than as isolated tubes which leads to a quenching of their photoluminescence.
|Subjects:||Material Science > Functional and hybrid materials|
Physical Science > Nano objects
Material Science > Nanochemistry
|Deposited On:||20 Jan 2009 16:04|
|Last Modified:||20 Jan 2009 16:04|
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