(361g) Study of Unique Thermodynamic Equilibria of Co-Surfactant Systems for Functionalizing Specific Chiralities of Single Walled Carbon Nanotubes
Here, we present utilization of this thermodynamic equilibria for selectively eluting a mixture of chiralities and modifying their functionality. Adsorption of added surfactant leads to reorganization of the surfactant shell around nanotube which leads to solvatochromatic shifts that can be probed through optical spectroscopy. Addition of DOC to SWCNT solution results in elution of a mixture of chiralities whose CERC is below the SDS/DOC ratio. Addition of SDS to this mixture results in opposite solvatochromatic shifts whose extent would indicate the surfactant reorganization around a particular (n,m) species. This would enable to functionalize selective species in solution. Different ligands were studied for functionalizing different chiralities for simultaneous detection of analytes in solution. This approach provides a promising pathway for using SWCNTs as biosensors by selectively functionalizing different chiralities without obtaining monochiral fractions.