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Controllable Expansion of Single-Walled Carbon Nanotube Dispersions Using Density Gradient Ultracentrifugation
- Source :
- Journal of Physical Chemistry C. 144:4831
- Publication Year :
- 2010
- Publisher :
- American Chemical Society, 2010.
-
Abstract
- We present a protocol to selectively isolate single-walled carbon nanotubes (SWNTs) with different chiralities in a full-colored “rainbow” expansion using density gradient ultracentrifugation (DGU). Starting with SWNTs synthesized by the alcohol catalytic chemical vapor deposition (ACCVD) method, we used sodium deoxycholate (DOC) and sodium dodecyl sulfate (SDS) as cosurfactant encapsulating agents to form a DOC-restricted SDS wrapping morphology around the SWNTs. This enhances the density differences between nanotubes of different diameters, which leads to efficient chirality redistribution when combined with an appropriate density gradient profile. UV−vis-NIR absorbance spectra and photoluminescence excitation (PLE) maps show the optical properties of each fraction, and 97% pure isolation of (6,5) SWNTs achieved from the rainbow is also reported.
- Subjects :
- Materials science
Density gradient
Catalytic chemical vapor deposition
technology, industry, and agriculture
Carbon nanotube
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
law.invention
chemistry.chemical_compound
General Energy
chemistry
Chemical engineering
law
Organic chemistry
Redistribution (chemistry)
Density gradient ultracentrifugation
Photoluminescence excitation
Physical and Theoretical Chemistry
Sodium dodecyl sulfate
Absorbance spectra
Subjects
Details
- Language :
- English
- Volume :
- 144
- Database :
- OpenAIRE
- Journal :
- Journal of Physical Chemistry C
- Accession number :
- edsair.doi.dedup.....7059c02c5ab9c1ab4475de23b9b192b0