ELECTROPHORETIC DIRECTED ASSEMBLY AND TRANSFER OF SINGLE-WALLED CARBON NANOTUBES FOR NANOSCALE DEVICES

Abstract

Single Walled Carbon Nanotubes (SWNTs) are one of the promising novel nanomaterials for future nanoscale electronics due to their both metallic and semiconducting properties and 1D charge transport capability. In order to realize the electronics devices with carbon nanotubes, control over their positions over the substrate layouts without degrading their electronic properties are important for scalability and reproducibility of such devices. The integration of carbon nanotubes to electronics devices with alignment in the direction of current flow at high density is critical to achieve in order to be able to realize these devices, which have tremendous advantages over recent silicon technologies by enhancing the transistor performance, and over previous sensor applications by introducing carbon nanotubes as a new class of nanomaterials. In this research, we present an electrophoretic directed assembly and an alternative PMMA mediated transfer method for the transfer of SWNTs by providing an average nanotube density of more than 40 SWNTs/?m (per unit channel width in micrometers) on a single device. One or a few monolayers of assembly is achievable with the electrophoretic directed assembly method. Moreover, a highly efficient transfer is implemented, which doesnÍt degrade the device performance as long as properly applied with the future provisions in this research.