(Invited) Carbon Nanotube Separation By Aqueous Two-Phase Extraction: A Progress Report

In this talk, I will report recent progress made at NIST in carbon nanotube (CNT) separation by the aqueous two-phase (ATP) method. We have found that redox chemistry of carbon nanotubes can be used for band-gap dependent sorting of carbon nanotubes by ATP. The redox mechanism appears to be a general one controlling other types of CNT separations. We have also identified new DNA sequence patterns that have improved recognition for specific chirality CNTs, making ATP-based DNA-CNT separation much more efficient.