Growth of High-DensityHorizontally Aligned SWNT Arrays using Trojan Catalysts

Y Hu†, L Kang†,Q Zhao†, H Zhong, S Zhang, L Yang, Z WANG, J Lin, Q Li, Z Zhang, L Peng, Z Liu, J Zhang*, Nature Commun.2015, 6, 6099.

ABSTRACT:Single-walled carbon nanotube (SWNT)-based electronics have been regarded as one of themost promising candidate technologies to replace or supplement silicon-based electronics in the future. These applications require high-density horizontally aligned SWNTarrays. During the past decade, significant efforts have been directed towards growth of high-density SWNT arrays. However, obtaining SWNT arrays with suitable density and quality still remains a big challenge. Herein, we develop a rational approach to grow SWNT arrays with ultra-high density using Trojan catalysts. The density can be as high as 130 SWNTs mm1. Field-effect transistors fabricated with our SWNT arrays exhibit a record drive current density of 467.09 mAmm1 and an on-conductance of 233.55 mS mm1. Radio frequency transistors fabricated on these samples exhibit high intrinsic fT and fMAX of 6.94 and 14.01 GHz, respectively. These results confirm our high-density SWNT arrays are strong candidates for applications in electronics.