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Exploiting Two-Dimensional Bi2O2Se for Trace Oxygen Detection |
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| Authors: | Dr Shipu Xu Dr Huixia Fu Ye Tian Tao Deng Dr Jun Cai Prof?Dr Jinxiong Wu Teng Tu Tianran Li Congwei Tan Dr Yan Liang Congcong Zhang Prof?Dr Zhi Liu Prof?Dr Zhongkai Liu Prof?Dr Yulin Chen Prof?Dr Ying Jiang Prof?Dr Binghai Yan Prof?Dr Hailin Peng |
| Institution: | 1. Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871 P. R. China;2. Department of Condensed Matter Physics, Weizmann Institute of Science, 7610001 Rehovot, Israel
These authors contributed equally to this work.;3. International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871 P. R. China;4. CAS Center for Excellence in Superconducting Electronics (CENSE), State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai, 200050 P. R. China University of Chinese Academy of Sciences, Beijing, 100049 P. R. China School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210 P. R. China;5. CAS Center for Excellence in Superconducting Electronics (CENSE), State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai, 200050 P. R. China School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210 P. R. China;6. Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350 P. R. China;7. Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871 P. R. China;8. School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210 P. R. China ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai, 201210 P. R. China Collaborative Innovation Center of Quantum Matter, Beijing, 100084 P. R. China Department of Physics, University of Oxford, Oxford, OX1 3PU UK;9. International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871 P. R. China Collaborative Innovation Center of Quantum Matter, Beijing, 100871 P. R. China CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, P. R. China;10. Department of Condensed Matter Physics, Weizmann Institute of Science, 7610001 Rehovot, Israel |
| Abstract: | We exploit a high-performing resistive-type trace oxygen sensor based on 2D high-mobility semiconducting Bi2O2Se nanoplates. Scanning tunneling microscopy combined with first-principle calculations confirms an amorphous Se atomic layer formed on the surface of 2D Bi2O2Se exposed to oxygen, which contributes to larger specific surface area and abundant active adsorption sites. Such 2D Bi2O2Se oxygen sensors have remarkable oxygen-adsorption induced variations of carrier density/mobility, and exhibit an ultrahigh sensitivity featuring minimum detection limit of 0.25 ppm, long-term stability, high durativity, and wide-range response to concentration up to 400 ppm at room temperature. 2D Bi2O2Se arrayed sensors integrated in parallel form are found to possess an oxygen detection minimum of sub-0.25 ppm ascribed to an enhanced signal-to-noise ratio. These advanced sensor characteristics involving ease integration show 2D Bi2O2Se is an ideal candidate for trace oxygen detection. |
| Keywords: | amorphous layers Bi2O2Se integration oxygen sensors two-dimensional materials |