Layered Black Phosphorus as a Selective Vapor Sensor
Black phosphorus is a layered material that is sensitive to the surrounding atmosphere. This is generally considered as a disadvantage, especially when compared to more stable layered compounds, such as graphite or MoS2. This sensitivity is now turned into an advantage. A vapor sensor that is based...
| Main Authors: | , , |
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| Format: | Journal Article |
| Language: | English |
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2016
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| Online Access: | https://hdl.handle.net/10356/83814 http://hdl.handle.net/10220/41451 |
| _version_ | 1826121950016045056 |
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| author | Mayorga-Martinez, Carmen C. Sofer, Zdeněk Pumera, Martin |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Mayorga-Martinez, Carmen C. Sofer, Zdeněk Pumera, Martin |
| author_sort | Mayorga-Martinez, Carmen C. |
| collection | NTU |
| description | Black phosphorus is a layered material that is sensitive to the surrounding atmosphere. This is generally considered as a disadvantage, especially when compared to more stable layered compounds, such as graphite or MoS2. This sensitivity is now turned into an advantage. A vapor sensor that is based on layered black phosphorus and uses electrochemical impedance spectroscopy as the detection method is presented; the device selectively detects methanol vapor. The impedance phase measured at a constant frequency is used as a distinctive parameter for the selective quantification of methanol, and increases with the methanol concentration. The low detection limit of 28 ppm is well below the approved exposure limit of 200 ppm. The results are highly reproducible, and the vapor sensor is shown to be very selective in the presence of other vapors and to have long-term stability. |
| first_indexed | 2024-10-01T05:40:31Z |
| format | Journal Article |
| id | ntu-10356/83814 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:40:31Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/838142023-02-28T19:37:53Z Layered Black Phosphorus as a Selective Vapor Sensor Mayorga-Martinez, Carmen C. Sofer, Zdeněk Pumera, Martin School of Physical and Mathematical Sciences black phosphorus methanol Black phosphorus is a layered material that is sensitive to the surrounding atmosphere. This is generally considered as a disadvantage, especially when compared to more stable layered compounds, such as graphite or MoS2. This sensitivity is now turned into an advantage. A vapor sensor that is based on layered black phosphorus and uses electrochemical impedance spectroscopy as the detection method is presented; the device selectively detects methanol vapor. The impedance phase measured at a constant frequency is used as a distinctive parameter for the selective quantification of methanol, and increases with the methanol concentration. The low detection limit of 28 ppm is well below the approved exposure limit of 200 ppm. The results are highly reproducible, and the vapor sensor is shown to be very selective in the presence of other vapors and to have long-term stability. MOE (Min. of Education, S’pore) Published version 2016-09-16T04:47:00Z 2019-12-06T15:32:36Z 2016-09-16T04:47:00Z 2019-12-06T15:32:36Z 2015 Journal Article Mayorga-Martinez, C. C., Sofer, Z., & Pumera, M. (2015). Layered Black Phosphorus as a Selective Vapor Sensor. Angewandte Chemie International Edition, 54(48), 14317-14320. 1433-7851 https://hdl.handle.net/10356/83814 http://hdl.handle.net/10220/41451 10.1002/anie.201505015 en Angewandte Chemie International Edition © 2015 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. 4 p. application/pdf |
| spellingShingle | black phosphorus methanol Mayorga-Martinez, Carmen C. Sofer, Zdeněk Pumera, Martin Layered Black Phosphorus as a Selective Vapor Sensor |
| title | Layered Black Phosphorus as a Selective Vapor Sensor |
| title_full | Layered Black Phosphorus as a Selective Vapor Sensor |
| title_fullStr | Layered Black Phosphorus as a Selective Vapor Sensor |
| title_full_unstemmed | Layered Black Phosphorus as a Selective Vapor Sensor |
| title_short | Layered Black Phosphorus as a Selective Vapor Sensor |
| title_sort | layered black phosphorus as a selective vapor sensor |
| topic | black phosphorus methanol |
| url | https://hdl.handle.net/10356/83814 http://hdl.handle.net/10220/41451 |
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