Recently,two-dimension(2D)materials have fueled considerable interest in the field of gas sensing to cope urgent demands at specific scenarios.Unfortunately,the susceptibility to ambient humidity,and/or fragile operat...Recently,two-dimension(2D)materials have fueled considerable interest in the field of gas sensing to cope urgent demands at specific scenarios.Unfortunately,the susceptibility to ambient humidity,and/or fragile operation stability always frustrate their further practicability.To overcome these drawbacks,we proposed one novel flexible gas sensor based on bismuth selenide(Bi_(2)Se_(3))nanoplates for sensitive NO_(2)detection at room temperature.The as-prepared Bi_(2)Se_(3)sensor exhibited favorable sensing performance,including remarkable NO_(2)selectivity,high response of 120%and fast response time of 81 s toward 5ppm NO_(2),an ultralow detection limit of 100 ppb,and nice stability.Besides,the excellent humidity tolerance and mechanical flexibility endowed Bi_(2)Se_(3)sensors with admirable reliability under harsh working conditions.The first-principles calculation further revealed the insights of extraordinary NO_(2)selectivity and the underlying gas-sensing mechanism.展开更多
基金This work was partially supported by Fundamental and Frontier Research Project of Chongqing(Nos.cstc2019jcyj-msxmX0037 and cstc2020jcyj-msxmX1041)National Natural Science Foundation of China(Nos.61704014 and 52175281)Youth Innovation Promotion Association of CAS(No.2021382).
文摘Recently,two-dimension(2D)materials have fueled considerable interest in the field of gas sensing to cope urgent demands at specific scenarios.Unfortunately,the susceptibility to ambient humidity,and/or fragile operation stability always frustrate their further practicability.To overcome these drawbacks,we proposed one novel flexible gas sensor based on bismuth selenide(Bi_(2)Se_(3))nanoplates for sensitive NO_(2)detection at room temperature.The as-prepared Bi_(2)Se_(3)sensor exhibited favorable sensing performance,including remarkable NO_(2)selectivity,high response of 120%and fast response time of 81 s toward 5ppm NO_(2),an ultralow detection limit of 100 ppb,and nice stability.Besides,the excellent humidity tolerance and mechanical flexibility endowed Bi_(2)Se_(3)sensors with admirable reliability under harsh working conditions.The first-principles calculation further revealed the insights of extraordinary NO_(2)selectivity and the underlying gas-sensing mechanism.
