"dragging mode" electrohydrodynamic jet printing of polymer-wrapped semiconducting single-walled carbon nanotubes for NO gas-sensing field-effect transistors

"dragging mode" electrohydrodynamic jet printing of polymer-wrapped semiconducting single-walled carbon nanotubes for NO gas-sensing field-effect transistors

Ammonia

Acetone

Gas detectors

Gases

Chemical detection

Chemical sensors

Single-walled carbon nanotubes (SWCN)

Field effect transistors

Threshold voltage

In this study, we investigated facile "dragging mode"electrohydrodynamic (EHD) jet printing of a polymer-wrapped semiconducting single-walled carbon nanotube (s-SWCNT) ink, for fabrication of NO gas-sensing field-effect transistors (FETs). The "dragging mode"provides a favorable environment for reliable printing and interconnection between the s-SWCNTs. Printing parameters such as supply voltages, printing speeds, and the number of prints were manipulated to find an optimal printing condition and obtain high-performance FETs. Under optimal conditions, the polymer-wrapped s-SWCNT-based FETs exhibited an average field-effect mobility of 2.939 cm2 (V-1 s-1), a threshold voltage of 2.21 V, an on/off ratio of 103, and a subthreshold swing of 0.968 V dec-1. Additionally, we demonstrated the application of FETs as NO sensors with high sensitivity and selectivity. The FET-type NO gas sensor exhibits a dynamic sensing range of 500 ppb-30 ppm and clear selectivity among various analyte gases including ethanol, ammonia, and acetone. Therefore, the "dragging mode"EHD jet printing introduced in this study simplifies patterning processes and is a potential reproducible method for the fabrication of next-generation gas sensors. 2021 The Royal Society of Chemistry.

15804-15812

9

Journal of Materials Chemistry C

2021

Tang, Xiaowu

Girma, Henok Getachew

Li, Zhijun

Hong, Jisu

Lim, Bogyu

Jung, Seo-Hyun

Kim, Yejin

Nam, Sang Yong

Kim, Kyunghun

Kong, Hoyoul

Kim, Se Hyun

journalArticle

20507534

10.1039/d1tc04638a