신동헌 최용석 박상윤 여창수 박용열 송준성 이승기 김태욱 배수강 홍병희 2024-01-19T12:32:36Z 2024-01-19T12:32:36Z 2022-02-17 2022-03 0169-4332 https://pubs.kist.re.kr/handle/201004/115590 Transition metal dichalcogenides (TMDs) possess great potential for use in gas sensing applications because, in contrast to conventional metal oxides, they have unique semiconducting properties with band gaps that can be tuned by adjusting thickness and composition. However, one issue is that their recovery time at room temperature is too long for them to be used practically in sustainable sensing applications. We found that incorporating Se atoms weaken interactions with gas molecules compared to when S atoms are used alone, therefore, the responsivity, as well as the recovery properties, of MoSxSe2-x sensors were significantly enhanced by increasing the ratio of Se to S. Herein, we demonstrate high-performance gas sensors that are based on reduced graphene oxide (rGO) fibers coated with MoSxSe2-x, the fabricated sensor could efficiently refresh its surface to allow fast, complete recovery at room temperature. Furthermore, it was shown that the porosity of rGO fibers with their large surface-to-volume ratio leads to enhanced sensing at room temperature. English North-Holland Fast and complete recovery of TMDs-decorated rGO fiber gas sensors at room temperature Article 10.1016/j.apsusc.2021.151832 1 Applied surface science, v.578 Applied surface science 578 N scie scopus 000729879600003 2-s2.0-85119961476 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics MOS2 NO2 OXIDE SENSITIVITY PERFORMANCE NANOSHEETS UV rGO fiber Gas sensor TMDs alloy Wearable sensor Recovery time