Abstract
This study was to separate the semiconducting and the metallic types of single-wall carbon nanotubes (SWNTs) by
electrophoresis with the different dispersants that are deoxyribonucleic acid (DNA), Triton X-100 and sodium dodecyl
sulfate (SDS), respectively. The dispersants modify the surface of SWNTs and disperse in the de-ionized water. and used
electric power supply 100V to electrophoresis. However, the different dispersants such as DNA, Triton X-100 and SDS
coated on SWNTs have different property of electronic field. Hence, in the same power of electrophoresis was applied to
separate out s-SWNT and m-SWNT from the raw-SWNT. In addition, the DNA base pair and quantitative can be determine
by electrophoresis with standard mark. The electrophoresis has features that low sample need, low energy required and
efficiently for this fabrication. The results of Raman spectrum could verify the separation efficiency and determine the
electrical of the samples with the radial breathing mode (RBM, 100-400cm-1) of SWNT. After the dispersion process with
DNA, a new peak (~1450 cm-1) has been observed between D-band (~1350cm-1) and G-band (~1550cm-1) that also can
identify s-SWNT and m-SWNT.
