Langmuir-Blodgett Assembly of Densely Aligned Single-Walled Carbon Nanotubes from Bulk Materials

摘要

Single-walled carbon nanotubes (SWNTs) exhibit advanced properties desirable for high-performance nanoelectronics. Important to future manufacturing of high-current, -speed, and -density nanotube circuits is a large-scale assembly of SWNTs into densely aligned forms. Despite progress in oriented synthesis and assembly including the Langmuir-Blodgett (LB) method, no method exists for producing assemblies of pristine SWNTs (free of extensive covalent modifications) with both high density and high degree of alignment of SWNTs. Here, we develop a LB method achieving monolayers of aligned noncovalently functionalized SWNTs from organic solvent with dense packing. The monolayer SWNTs are readily patterned for device integration by microfabrication, enabling the high currents (～3mA) SWNT devices with narrow channel widths. Our method is generic for different bulk materials with various diameters.