Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 228, Issue -, Pages 688-692Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.01.094
Keywords
Single-walled carbon nanotubes; Defect funct ionalizat ion; NO2 gas; Sensors
Funding
- Industrial Strategic Technology Development Program (Development to System of Diagnosis AMP
- Treatment for a Respiratory Disease Based on Bio-chip) - Ministry of Trade, Industry AMP
- Energy (MI, Korea) [10047909]
- KIST Institution Research Program [2E25381]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10047909] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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. (C) 2016 Elsevier B.V. All rights reserved.
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