@article{Yang2018, 
author = {Yingjun Yang and Li Ding and Hengjia Chen and Jie Han and Zhiyong Zhang and Lian-Mao Peng},
title = {Carbon nanotube network film-based ring oscillators with sub 10-ns propagation time and their applications in radio-frequency signal transmission},
year = {2018},
journal = {Nano Research},
volume = {11},
number = {1},
pages = {300-310},
keywords = {carbon nanotube, nanoelectronics, field-effect transistors, radio-frequency, ring oscillator},
url = {https://www.sciopen.com/article/10.1007/s12274-017-1632-1},
doi = {10.1007/s12274-017-1632-1},
abstract = {We have fabricated top-gated ambipolar field-effect transistors (FETs) based on solution-derived carbon nanotube (CNT) network films, and then constructed inverters and ring oscillators (ROs) that can work under supply voltages as low as 0.2 V owing to the high uniformity of the devices. Significant improvements were achieved in the performance of these CNT-based ambipolar FETs and CMOS-like circuits by scaling down the gate length of the CNT FETs and optimizing the device structure and RO layout. In particular, the optimized five-stage RO is shown to present a record high oscillation frequency of up to 17.4 MHz with a propagation time of 5.6 ns at a 12-V working voltage. The CNT film-based ROs were used as carrier-wave generators in radio-frequency systems to demonstrate a complete signal transmission process. These results suggest that CNT thin film-based FETs and integrated circuits may soon find their way to radio-frequency applications with a frequency band of 13.56 MHz.}
}