High-response room-temperature NO2 gas sensor fabricated with thermally reduced graphene oxide-coated commercial cotton fabric
Won Taek Jung,
Hyun-Seok Jang,
Sang Moon Lee,
Won G. Hong,
Young Jin Bae,
Hyo Seon Lee,
Byung Hoon Kim
Affiliations
Won Taek Jung
Department of Physics, Incheon National University, Incheon, 22012, Republic of Korea
Hyun-Seok Jang
Department of Physics, Incheon National University, Incheon, 22012, Republic of Korea
Sang Moon Lee
Research Center for Materials Analysis, Korea Basic Science Institute, Daejeon, 34133, Republic of Korea
Won G. Hong
Research Center for Materials Analysis, Korea Basic Science Institute, Daejeon, 34133, Republic of Korea
Young Jin Bae
Department of Physics, Incheon National University, Incheon, 22012, Republic of Korea
Hyo Seon Lee
Department of Physics, Incheon National University, Incheon, 22012, Republic of Korea
Byung Hoon Kim
Department of Physics, Incheon National University, Incheon, 22012, Republic of Korea; Intelligent Sensor Convergence Research Center, Incheon National University, Incheon, 22012, Republic of Korea; Institute of Basic Science, Incheon National University, Incheon, 22012, Republic of Korea; Corresponding author. Department of Physics, Incheon National University, Incheon, 22012, Republic of Korea.
Electronic textile-based gas sensors with a high response for NO2 gas were fabricated using reduced graphene oxide (rGO)-coated commercial cotton fabric (rGOC). Graphene oxide (GO) was coated on cotton fabric by simply dipping the cotton into a GO solution. To investigate the relationship between the degree of reduction and the sensing response, the GO-coated fabrics were thermally reduced at various temperatures (190, 200, 300, and 400 °C). The change in the amount of oxygen functional groups on the rGOCs was observed by x-ray photoelectron spectroscopy, Raman spectroscopy, and x-ray diffraction patterns. The maximum sensing response of 45.90 % at 10 ppm of NO2 gas at room temperature was exhibited by the rGOC treated at 190 °C, which was the lowest heat-treatment temperature. The high response comes from the greater amount of oxygen functional groups compared to other rGOC samples, and the tubular structure of the cotton.
