TY - JOUR
T1 - MoS2–carbon nanotube hybrid material growth and gas sensing
AU - Deokar, Geetanjali
AU - Vancso, Peter
AU - Arenal, Raul
AU - Ravaux, Florent
AU - Casanova-Cháfer, Juan
AU - Llobet, Eduard
AU - Makarova, Anna
AU - Vyalikh, Denis
AU - Struzzi, Claudia
AU - Lambin, Philippe
AU - Jouiad, Mustapha
AU - Colomer, Jean-François
N1 - Funding Information:
This research used resources of the Electron Microscopy facilities of Masdar Institute and University of Mons. This research leading to these results received funding in part from European Union Seventh Framework H2020 Program under Grant Agreement No. 696656 Graphene Flagship. J.-F.C. is Senior Research Associate of FRS-FNRS. R.A. gratefully acknowledges the support from the Spanish Ministerio de Economia y Competitividad (MAT2016-79776-P), from the Government of Aragon and the European Social Fund under the project “Construyendo Europa desde Aragon” 2014–2020 (Grant No. E/26), and from the European Union H2020 program ETN project “Enabling Excellence” Grant Agreement No. 642742. E.L. was supported by the Catalan Institution for Research and Advanced Studies via the ICREA Academia Award and MINECO-FEDER (grant no. TEC2015-71663-R) and J.C.-C. was supported by Universitat Rovira i Virgili via a Martí i Franquès predoctoral fellowship. This research used resources of the “Plateforme Technologique de Calcul Intensif (PTCI),” which was supported by the F.R.S.-FNRS under Convention No. 2.5020.11. This work was supported by the Helmholtz-Zentrum Berlin für Materialien und Energie within a bilateral Russian–German Laboratory program. A.A.M. acknowledges support from DFG, Grant No. LA655/13-2. D.V.V. acknowledges Saint Petersburg State University (SPbU) for research Grant No. 15.61.202.2015.
Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/12/22
Y1 - 2017/12/22
N2 - Abstract Hexagonal-shaped nanoplates (HNPs) of MoS2 on vertically aligned carbon nanotubes (CNTs) over a patterned area (a circular area of 1 cm2 diameter) are produced by chemical vapor deposition technique. With an optimized initial Mo film thickness, a uniform coverage of MoS2 HNPs with a thickness around 20 nm is achieved. The results confirm that the CNT template plays an important role in the MoS2 HNPs growth. Each MoS2 HNP consists of abundant exposed edges, interesting for sensing and catalysis applications. High crystallinity and quality of the as-produced material are revealed by X-ray photoelectron and Raman spectroscopies. Furthermore, NO2 gas-sensing studies show better sensitivity and recovery for MoS2/CNT samples as compared to pristine CNTs. The detection of NO2 gas in a few tens of parts per million to a few hundreds of parts per billion range, at room temperature, is achieved. Density-functional theory calculation indicates that the exposed edges of MoS2 play a significant role in the NO2 sensing as compared to horizontally aligned MoS2 layers. The present report can promote the research toward the fabrication of efficient and reliable MoS2-based hybrid materials for toxic gas-sensing applications for air quality monitoring in various environments. Patterned 3D hierarchical MoS2 hexagonal nanoplates with exposed edges are synthesized on vertically aligned carbon nanotubes by a simple chemical vapor deposition technique. The as-grown hybrid heterostructure with only top contacts, shows excellent NO2 gas-sensing properties over a few ppb to a few hundreds of ppm range.
AB - Abstract Hexagonal-shaped nanoplates (HNPs) of MoS2 on vertically aligned carbon nanotubes (CNTs) over a patterned area (a circular area of 1 cm2 diameter) are produced by chemical vapor deposition technique. With an optimized initial Mo film thickness, a uniform coverage of MoS2 HNPs with a thickness around 20 nm is achieved. The results confirm that the CNT template plays an important role in the MoS2 HNPs growth. Each MoS2 HNP consists of abundant exposed edges, interesting for sensing and catalysis applications. High crystallinity and quality of the as-produced material are revealed by X-ray photoelectron and Raman spectroscopies. Furthermore, NO2 gas-sensing studies show better sensitivity and recovery for MoS2/CNT samples as compared to pristine CNTs. The detection of NO2 gas in a few tens of parts per million to a few hundreds of parts per billion range, at room temperature, is achieved. Density-functional theory calculation indicates that the exposed edges of MoS2 play a significant role in the NO2 sensing as compared to horizontally aligned MoS2 layers. The present report can promote the research toward the fabrication of efficient and reliable MoS2-based hybrid materials for toxic gas-sensing applications for air quality monitoring in various environments. Patterned 3D hierarchical MoS2 hexagonal nanoplates with exposed edges are synthesized on vertically aligned carbon nanotubes by a simple chemical vapor deposition technique. The as-grown hybrid heterostructure with only top contacts, shows excellent NO2 gas-sensing properties over a few ppb to a few hundreds of ppm range.
KW - CNT
KW - DFT calculations
KW - MoS
KW - gas sensor
KW - nanoplates
UR - http://www.scopus.com/inward/record.url?scp=85038556323&partnerID=8YFLogxK
U2 - 10.1002/admi.201700801
DO - 10.1002/admi.201700801
M3 - Article
SN - 2196-7350
VL - 4
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 24
M1 - 1700801
ER -