Home > Articles > Published articles > Fabrication and characterization of large-area suspended MoSe2 crystals down to the monolayer |
Date: | 2021 |
Abstract: | Many layered materials, such as graphene and transition metal dichalcogenides, can be exfoliated down to atomic or molecular monolayers. These materials exhibit exciting material properties that can be exploited for several promising device concepts. Thinner materials lead to an increased surface-to-volume ratio, with mono- and bi-layers being basically pure surfaces. Thin crystals containing more than two layers also often behave as an all-surface material, depending on the physical property of interest. As a result, flakes of layered materials are typically highly sensitive to their environment, which is undesirable for a broad range of studies and potential devices. Material systems based on suspended flakes overcome this issue, yet often require complex fabrication procedures. Here, we demonstrate the relatively straightforward fabrication of exfoliated MoSe flakes down to the monolayer, suspended over unprecedentedly large holes with a diameter of 15 µm. We describe our fabrication methods in detail, present characterization measurements of the fabricated structures, and, finally, exploit these suspended flakes for accurate optical absorption measurements. |
Grants: | European Commission 804349 Ministerio de Economía y Competitividad FPI-SO 2019 Ministerio de Economía y Competitividad FPI-SO 2018 Ministerio de Economía y Competitividad SEV-2017-0706 Ministerio de Ciencia e Innovación PGC2018-101743-B-I00 Ministerio de Ciencia e Innovación RYC-2017-22330 Agencia Estatal de Investigación PID2019-111673GB-I00 |
Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Language: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Subject: | Suspended flakes ; Transition metal dichalcogenides ; MoSe2 ; Dry-transfer ; Optical absorption |
Published in: | JPhys materials, Vol. 4, issue 4 (Oct. 2021) , art. 46001, ISSN 2515-7639 |
12 p, 2.2 MB |