[en] The all-surface nature of two-dimensional (2D) materials renders them highly sensitive to environmental changes, enabling the on-demand tailoring of their physical properties. Transition metal dichalcogenides, such as 2H molybdenum disulfide (MoS2), can be used as a sensory material capable of discriminating molecules possessing a similar structure with a high sensitivity. Among them, the identification of isomers represents an unexplored and challenging case. Here, we demonstrate that chemical functionalization of defect-engineered monolayer MoS2 enables isomer discrimination via a field-effect transistor readout. A multiscale characterization comprising X-ray photoelectron spectroscopy, Raman spectroscopy, photoluminescence spectroscopy, and electrical measurement corroborated by theoretical calculations revealed that monolayer MoS2 exhibits exceptional sensitivity to the differences in the dipolar nature of molecules arising from their chemical structure such as the one in difluorobenzenethiol isomers, allowing their precise recognition. Our findings underscore the potential of 2D materials for molecular discrimination purposes, in particular for the identification of complex isomers.
Disciplines :
Chemistry
Author, co-author :
Han, Bin; Université de Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
Gali, Sai Manoj ; Université de Mons - UMONS > Faculté des Science > Service de Chimie des matériaux nouveaux
Dai, Shuting; Université de Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France ; State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
Beljonne, David ; Université de Mons - UMONS > Faculté des Science > Service de Chimie des matériaux nouveaux
Samorì, Paolo; Université de Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
Language :
English
Title :
Isomer Discrimination via Defect Engineering in Monolayer MoS2.
R400 - Institut de Recherche en Science et Ingénierie des Matériaux Complexys
Funders :
Agence Nationale de la Recherche Centre International de Recherche aux Fronti?res de la Chimie China Scholarship Council Institut Universitaire de France H2020 European Research Council
Funding text :
This work was supported by the EC through the ERC project SUPRA2DMAT (GA-833707) and the Graphene Flagship Core 3 project (GA-881603) as well as the Labex project CSC (ANR-10LABX-0026 CSC) within the Investissement d’Avenir program ANR-10-IDEX-0002-02, the International Center for Frontier Research in Chemistry, the Institut Universitaire de France (IUF), and the Chinese Scholarship Council. The computational resources in Mons are supported by the FNRS “Consortium des Equipements de Calcul Intensif–CECI” program Grant No. 2.5020.11 and by the Walloon Region (ZENOBE Tier-1 supercomputer, under grant 1117545). S.M.G. is Chargé de Recherche–FNRS, and D.B. is Research Director–FNRS.
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