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Octahedral Molybdenum Iodide Clusters Supported on Graphene for Resistive and Optical Gas Sensing

[Image: see text] This paper reports for the first time a gas-sensitive nanohybrid based on octahedral molybdenum iodide clusters supported on graphene flakes (Mo(6)@Graphene). The possibility of integrating this material into two different transducing schemes for gas sensing is proposed since the n...

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Autores principales: Casanova-Chafer, Juan, Garcia-Aboal, Rocio, Atienzar, Pedro, Feliz, Marta, Llobet, Eduard
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9801382/
https://www.ncbi.nlm.nih.gov/pubmed/36511821
http://dx.doi.org/10.1021/acsami.2c15716
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author Casanova-Chafer, Juan
Garcia-Aboal, Rocio
Atienzar, Pedro
Feliz, Marta
Llobet, Eduard
author_facet Casanova-Chafer, Juan
Garcia-Aboal, Rocio
Atienzar, Pedro
Feliz, Marta
Llobet, Eduard
author_sort Casanova-Chafer, Juan
collection PubMed
description [Image: see text] This paper reports for the first time a gas-sensitive nanohybrid based on octahedral molybdenum iodide clusters supported on graphene flakes (Mo(6)@Graphene). The possibility of integrating this material into two different transducing schemes for gas sensing is proposed since the nanomaterial changes both its electrical resistivity and optical properties when exposed to gases and at room temperature. Particularly, when implemented in a chemoresistive device, the Mo(6)@Graphene hybrid showed an outstanding sensing performance toward NO(2), revealing a limit of quantification of about 10 ppb and excellent response repeatability (0.9% of relative error). While the Mo(6)@Graphene chemoresistor was almost insensitive to NH(3), the use of an optical transduction scheme (changes in photoluminescence) provided an outstanding detection of NH(3) even for a low loading of Mo(6). Nevertheless, the photoluminescence was not affected by the presence of NO(2). In addition, the hybrid material revealed high stability of its gas sensing properties over time and under ambient moisture. Computational chemistry calculations were performed to better understand these results, and plausible sensing mechanisms were presented accordingly. These results pave the way to develop a new generation of multi-parameter sensors in which electronic and optical interrogation techniques can be implemented simultaneously, advancing toward the realization of highly selective and orthogonal gas sensing.
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spelling pubmed-98013822022-12-31 Octahedral Molybdenum Iodide Clusters Supported on Graphene for Resistive and Optical Gas Sensing Casanova-Chafer, Juan Garcia-Aboal, Rocio Atienzar, Pedro Feliz, Marta Llobet, Eduard ACS Appl Mater Interfaces [Image: see text] This paper reports for the first time a gas-sensitive nanohybrid based on octahedral molybdenum iodide clusters supported on graphene flakes (Mo(6)@Graphene). The possibility of integrating this material into two different transducing schemes for gas sensing is proposed since the nanomaterial changes both its electrical resistivity and optical properties when exposed to gases and at room temperature. Particularly, when implemented in a chemoresistive device, the Mo(6)@Graphene hybrid showed an outstanding sensing performance toward NO(2), revealing a limit of quantification of about 10 ppb and excellent response repeatability (0.9% of relative error). While the Mo(6)@Graphene chemoresistor was almost insensitive to NH(3), the use of an optical transduction scheme (changes in photoluminescence) provided an outstanding detection of NH(3) even for a low loading of Mo(6). Nevertheless, the photoluminescence was not affected by the presence of NO(2). In addition, the hybrid material revealed high stability of its gas sensing properties over time and under ambient moisture. Computational chemistry calculations were performed to better understand these results, and plausible sensing mechanisms were presented accordingly. These results pave the way to develop a new generation of multi-parameter sensors in which electronic and optical interrogation techniques can be implemented simultaneously, advancing toward the realization of highly selective and orthogonal gas sensing. American Chemical Society 2022-12-13 2022-12-28 /pmc/articles/PMC9801382/ /pubmed/36511821 http://dx.doi.org/10.1021/acsami.2c15716 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Casanova-Chafer, Juan
Garcia-Aboal, Rocio
Atienzar, Pedro
Feliz, Marta
Llobet, Eduard
Octahedral Molybdenum Iodide Clusters Supported on Graphene for Resistive and Optical Gas Sensing
title Octahedral Molybdenum Iodide Clusters Supported on Graphene for Resistive and Optical Gas Sensing
title_full Octahedral Molybdenum Iodide Clusters Supported on Graphene for Resistive and Optical Gas Sensing
title_fullStr Octahedral Molybdenum Iodide Clusters Supported on Graphene for Resistive and Optical Gas Sensing
title_full_unstemmed Octahedral Molybdenum Iodide Clusters Supported on Graphene for Resistive and Optical Gas Sensing
title_short Octahedral Molybdenum Iodide Clusters Supported on Graphene for Resistive and Optical Gas Sensing
title_sort octahedral molybdenum iodide clusters supported on graphene for resistive and optical gas sensing
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9801382/
https://www.ncbi.nlm.nih.gov/pubmed/36511821
http://dx.doi.org/10.1021/acsami.2c15716
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