Alignment of Different Functional Single Wall Carbon Nanotubes using Fe2O3 Nanoparticles under External Magnetic Field

摘要

In this paper we describe a new approach to align functionalized single walled carbon nanotubes (SWNTs) by γ-Fe2O3 in the presence of an external magnetic field without using chemical surfactant. Three different functionalized SWNTs are studied. SWNT-SO2OH dissolves completely. SWNT-COOH disperses well and shows the clear alignment. SWNT-PABS disperses poorly and exhibits some kind of alignment. The high entanglement of PABS chain decreases the alignment of SWNT-PABS. The results demonstrate that as long as the charges fit, the functional nanotubes alignment could be reached without chemical surfactant.