The dispersion of carbon nanotubes (CNTs) in liquid plays a crucial role in fundamental research and applied science. Ultrasonication is the most common technique to disperse CNTs. The surfactants used for CNT dispersion are ethanol, sodium dodecyl benzenesulfonate (SDBS), dodecyltrimethylammonium bromide (DATB), sodium dodecyl sulfate (SDS) and sodium dodecylbenzene sulfonate (NaDDBS). This research work presents the dispersion of SWCNTs by using a dimethylformamide (DMF) solution. The DMF is adsorbed on the surface of the nanotubes by a hydrophobic interaction. Ultrasonication helps DMF debundle the nanotubes by Coulombic or hydrophilic interaction, allowing the Van der Waals forces among the individual nanotubes to be overcome. UV-Vis spectra of dispersed CNTs in solution showed a maximum at 209 nm and decreased from UV to near IR. Field Emission Scanning Electron Microscope (FESEM) used to characterize the morphology of the SWCNTs thin films. And finally, the Fourier transform Spectroscopy was used to determine the interaction between surfactants and Carbon Nanotubes (CNTs).
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