A universal approach for extraction of single-walled carbon nanotubes of specific chirality using aqueous two-phase extraction  

作　　者：Blazej Podlesny Lukasz Czapura Patrycja Taborowska Luyao Zhang Feng Yang Dawid Janas 

机构地区：[1]Department of Organic Chemistry,Bioorganic Chemistry and Biotechnology,Silesian University of Technology,44–100 Gliwice,Poland [2]Department of Chemistry,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《Nano Research》2025年第2期806-816,共11页纳米研究(英文版)

摘　　要：The development of effective methods for obtainingmonochiral single-walledcarbonnanotubes(SWCNTs)is necessary to make many applications based on them viable for everyday use.Large-diameter semiconducting SWCNTs are particularly valuable due to their low band gap,but the isolation of such SWCNTs remains difficult to achieve as the number of possible chiralities scales strongly with diameter,and there are an overwhelming number of large-diameter SWCNT types.In this study,we demonstrate how monochiral(8,6)SWCNTs,which are 0.966 nm in diameter,can be straightforwardly harvested using the aqueous two-phase extraction(ATPE)method by employing a combination of ionic and non-ionic surfactants.The universal nature of the devised technique was demonstrated by generating fractions enriched with(8,6)SWCNTs starting from various commercially available mixtures of SWCNTs with drastically different compositions.To demonstrate the practical utility of the generated material,we studied how the obtained pure SwCNTs may be chemically modified to improve their optical characteristics.Interestingly,the course of the functionalization was highly dependent on the type of dispersant used to suspend the purified SWCNTs in the aqueous medium.

关 键 词：single-walled carbon nanotubes PURIFICATION FUNCTIONALIZATION sensing 

分 类 号：TB383[一般工业技术—材料科学与工程]