TY - JOUR
T1 - Layered Black Phosphorus as a Selective Vapor Sensor
AU - Mayorga-Martinez, Carmen C.
AU - Sofer, Zdeněk
AU - Pumera, Martin
N1 - Publisher Copyright:
© 2015 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2015/11/23
Y1 - 2015/11/23
N2 - 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.
AB - 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.
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U2 - 10.1002/anie.201505015
DO - 10.1002/anie.201505015
M3 - Article
AN - SCOPUS:84954172944
VL - 54
SP - 14317
EP - 14320
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 48
ER -