Micromechanical exfoliation of two-dimensional materials by a polymeric stamp

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH EXPRESS; v. 3, n. 2 FEB 2016.
• Citações Web of Science: 1

Resumo

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)

• Processo FAPESP: 13/26094-1 - Transferência de folhas de grafeno de SiO2/Si para diferentes substratos com controle da localização
• Beneficiário: Mariana Caldeira Ferraz da Costa
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 12/50259-8 - Grafeno: fotônica e opto-eletrônica: colaboração UPM-NUS
• Beneficiário: Antonio Helio de Castro Neto
• Modalidade de apoio: Auxílio à Pesquisa - Programa SPEC
• Processo FAPESP: 14/08448-3 - Geração de pulsos ultracurtos em lasers Raman com modos acoplados por absorvedores saturáveis de grafeno
• Beneficiário: Felipe Kessler
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado