Powder-based fabrication techniques for single-wall carbon nanotube circuits

In this paper, powder-based fabrication techniques are proposed, which are essential for the fabrication of single-wall carbon nanotube (SWNT) circuit. As an alternative to the more demanding chemical vapour deposition methods, the powder-based fabrication technique is simple and cost-effective. In this study, five powder-based preparation techniques are proposed and compared. The one using ultra centrifuge and spinner yields a high concentration of SWNTs evenly distributed on the same, ideal for constructing small SWNT circuits. Furthermore, techniques to separate metallic and semiconducting SWNTs are discussed. The proposed preparation and separation techniques are very important since they form the basis for the study of SWNT circuits. The proposed techniques are expected to have a huge impact on the SWNT circuit fabrication and design.