Gas sensing properties of defect-induced single-walled carbon nanotubes

作者：Kim Jaeseong; Choi Sun Woo; Lee Je Haeng; Chung Youngchul; Byun Young Tae^*

来源：Sensors and Actuators B: Chemical , 2016, 228: 688-692.

DOI：10.1016/j.snb.2016.01.094

• Single-walled carbon nanotubes
• Defect funct ionalizat ion
• NO2 gas
• Sensors

We report a method to induce defects on the surface of single-walled carbon nanotubes (SWNTs) in order to improve the gas-sensing properties of an SWNT-based sensor. In this approach, the surface of the SWNTs is physically modified by thermal treatment at high temperature. The fabricated SWNT-based sensors were subjected to rapid thermal annealing (RTA) over the temperature range of 300-800 degrees C. After the thermal treatment, the electrical resistances of the defect-induced SWNT sensors were measured and compared with those of pristine SWNT sensors. The gas sensing properties of the defect-induced SWNT sensors upon exposure to various gases such as NO2, NH3, and H-2 were measured at room temperature. The thermally treated SWNT-based sensors exhibited much higher sensitivity and recovery than the pristine sensors. These results indicate that the defect-induced SWNTs can improve the performance of SWNT-based sensors.

• 出版日期2016-6-2