Acoustic-assisted assembly of an individual monochromatic ultralong carbon nanotube for high on-current transistors.

ABSTRACT: Great effort has been applied to scientific research on the controllable synthesis of carbon nanotubes (CNTs) with high semiconducting selectivity or high areal density toward the macroscale applications of high-performance carbon-based electronics. However, the key issue of compatibility between these two requirements for CNTs remains a challenge, blocking the expected performance boost of CNT devices. We report an in situ acoustic-assisted assembly of high-density monochromatic CNT tangles (m-CNT-Ts), consisting of one self-entangled CNT with a length of up to 100 mm and consistent chirality. On the basis of a minimum consumed energy model with a Strouhal number of approximately 0.3, the scale could be controlled within the range of 1 × 10⁴ to 3 × 10⁴ ?m² or even a larger range. Transistors fabricated with one m-CNT-T showed an on/off ratio of 10³ to 10⁶ with 4-mA on-state current, which is also the highest on-state current recorded so far for single CNT-based transistors. This acoustic-assisted assembly of chiral-consistent m-CNT-Ts will provide new opportunities for the fabrication of high-performance electronics based on perfect CNTs with high purity and high density.

SUBMITTER: Zhu Z 

PROVIDER: S-EPMC5262447 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature