Author/Authors :
Wang، نويسنده , , Yan and Gao، نويسنده , , Lian and Sun، نويسنده , , Jing and Liu، نويسنده , , Yangqiao and Zheng، نويسنده , , Shan and Kajiura، نويسنده , , Hisashi and Li، نويسنده , , Yongming and Noda، نويسنده , , Kazuhiro، نويسنده ,
Abstract :
We have developed purification and cutting process of single-walled carbon nanotubes (SWNTs) by integrating (1) an acid reflux treatment to eliminate metal particles, (2) an ultrasonication in the H2SO4/HNO3 and H2SO4/H2O2 to cut and polish the SWNTs, respectively, and (3) an ammonia gas treatment to remove residual carbon impurities and to repair the sidewalls of SWNTs. The final products with a higher purity than 98% are well dispersed in aqueous solution using Pluronic P123 dispersant, which has been rarely used for the SWNTs dispersion. The dispersed SNWTs solution can exist stably for over two months.
