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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Micromechanical exfoliation of two-dimensional materials by a polymeric stamp

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Ferraz da Costa, M. C. [1] ; Ribeiro, H. B. [1] ; Kessler, F. [1, 2] ; de Souza, E. A. T. [1] ; Fechine, G. J. M. [1]
Total Authors: 5
[1] Univ Prebiteriana Mackenzie, MackGraphe Graphene & Nanomat Res Ctr, BR-01302907 Sao Paulo - Brazil
[2] Fed Univ Rio Grande, Sch Chem & Food, Porto Alegre, RS - Brazil
Total Affiliations: 2
Document type: Journal article
Source: MATERIALS RESEARCH EXPRESS; v. 3, n. 2 FEB 2016.
Web of Science Citations: 1

In this work, an alternative technique to the traditional micromechanical exfoliation of two-dimensional materials is proposed, consisting of isolated flakes of graphite and molybdenum disulphide onto polymeric surfaces films. The set made up of polymer and flakes is fabricated by using a hot-press machine called polymeric stamp. The polymeric stamp was used to allocate flakes and also to allow the exfoliation process to take place just in one face of isolated flake. Optical microscopy, Raman spectroscopy and photoluminescence spectroscopy results showed that multilayers, bilayers and single layers of graphene and MoS2 were obtained by using a polymeric stamp as tool for micromechanical exfoliation. These crystals were more easily found because the exfoliation process concentrates them in well-defined locations. The results prove the effectiveness of the method by embedding two-dimensional materials into polymers to fabricate fewer layers crystals in a fast, economic and clean way. (AU)

FAPESP's process: 13/26094-1 - Transfer of SiO2 / Si graphene sheets to different substrates with location control
Grantee:Mariana Caldeira Ferraz da Costa
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 12/50259-8 - Graphene: photonics and opto-electronics: UPM-NUS collaboration
Grantee:Antonio Helio de Castro Neto
Support Opportunities: Research Projects - SPEC Program
FAPESP's process: 14/08448-3 - Ultrashort pulse generation in Raman lasers with modes coupled by graphene saturable absorbers
Grantee:Felipe Kessler
Support Opportunities: Scholarships in Brazil - Post-Doctoral