Dielectrophoretic behavior of semiconducting single-walled carbon nanotubes(SWNT) was investigated theoretically and experimentally. The surface conductance of nanotubes was modulated using anionic and cationic surfactant mixtures. The experimental re...
Dielectrophoretic behavior of semiconducting single-walled carbon nanotubes(SWNT) was investigated theoretically and experimentally. The surface conductance of nanotubes was modulated using anionic and cationic surfactant mixtures. The experimental results indicate that dielectrophoretic behavior of SWNT highly depends on the procedure of mixing two opposite-charged surfactants. Clausius-Mossotti factor was calculated by measuring zeta potentials and solution conductivity. Raman spectroscopy was used to characterize the dielectrophoretically deposited nanotubes arrary. We found that metallic nanotubes were selectively separated from the nanotubes suspension, resulting from modulation of surface conductance of semiconducting SWNT.