 This paper proposes a novel approach to separating single-wall carbon nanotubes, SWNTs. The authors introduced anionic surfactants into the traditional mixture of anionic surfactants used in aqueous two-phase extraction, ATPE, which increases the resolution of the system. By analyzing the parameters of the system, they gain insight into the interactions between SWNTs, surfactants, and phase-forming agents, which drives the partitioning process. Using this knowledge, they propose a separation mechanism based on their findings. Furthermore, the authors demonstrate the effectiveness of their method by successfully isolating, six, four, SWNTs from various raw SWNT materials, including SWNT waste produced over the years in the lab. This article was authored by Blasier Podlesny, Kevin Arhinko, Keita Hayashi, and others.