Optical Characterizations And Electronic Devices Of Nearly Pure (10,5) Single-walled Carbon Nanotubes

摘要

Single-walled carbon nanotubes (SWNTs) have attracted phenomenal attention because of their potential applications in nano-electronics, drug delivery, and biosensors. The properties of SWNTs depend strongly on tube chirality and diameter. Large-diameter semiconducting tubes are preferred for nanoelectronics since they form good contact with the electrodes and can carry large currents. Recently, chromatography methods have been reported to separate small SWNTs (≤0.9 nm) according to their diameter, chirality, and length. Unfortunately, the efficiency of this method decreased with increasing tube diameter when the established ssDNA sequence d(GT)_n (n = 10-45) was used. The performance of the field-effect transistors (FETs) made with these tubes was limited because of their small diameter, demonstrating the need for better chirality separation of large-diameter SWNTs for high-performance nanoelectronics.