Selective extraction of semiconducting single-walled carbon nanotubes with a thermoresponsive polymer.

The extraction of single-walled carbon nanotubes by exploiting the phase transition of poly(N-isopropylacrylamide), a thermoresponsive polymer, was performed to obtain homogenous electronic properties. The semiconducting single-walled carbon nanotubes were selectively extracted into the aqueous phase of a PNIPAM solution above the lower critical solution temperature.