Rapid acid-mediated purification of single-walled carbon nanotubes with homogenization of bulk properties.
A rapid, mild and readily scaleable method for purification and isolation of single-walled nanotubes (SWNTs) using aqueous nitric acid that, in only 1-2 hours at reflux temperature, not only decrease the content of residual metal particles but also the relative ratio of small diameter and metallic NTs. The acid-treated SWNTs have been characterised by TEM, FT-IR, and Raman spectroscopy (514 and 783 cm(-1)). The results are discussed in relation to observations from other acid-mediated treatments and the reactive chemical species involved at different conditions.
Li
Junxin
J
Division of Organic Chemistry, Uppsala University, P. O. Box 576, SE 751 23 Uppsala, Sweden.
Chajara
Khalil
K
Lindgren
Jan
J
Grennberg
Helena
H
D002244:Carbon / Q000737:chemistry*; D006851:Hydrochloric Acid / Q000737:chemistry; D008422:Materials Testing; D046529:Microscopy, Electron, Transmission; D008968:Molecular Conformation; D053758:Nanoparticles; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013696:Temperature
D037742:Nanotubes, Carbon; D002244:Carbon; D006851:Hydrochloric Acid