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Title: Layered Black Phosphorus as a Selective Vapor Sensor
Authors: Mayorga-Martinez, Carmen C.
Sofer, Zdeněk
Pumera, Martin
Keywords: black phosphorus
Issue Date: 2015
Source: 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.
Series/Report no.: Angewandte Chemie International Edition
Abstract: 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.
ISSN: 1433-7851
DOI: 10.1002/anie.201505015
Schools: School of Physical and Mathematical Sciences 
Rights: © 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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