Graphene/MoS2 organic glasses: Fabrication and enhanced reverse saturable absorption properties |
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| Affiliation: | 1. Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland;2. Department of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland;1. Dipartimento di Chimica e Farmacia, Università di Sassari, Local INSTM Unit, Via Vienna 2, 07100 Sassari, Italy;2. Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Sede di Alessandria, Local INSTM Unit, Viale T. Michel 5, 15121 Alessandria, Italy |
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| Abstract: | Graphene/MoS2 (G/MoS2) composites were synthesized for the first time by a hydrothermal method, and then were dispersed in methyl methacrylate (MMA) to fabricate organic glass by a casting method. Here, the poly(methylmethacrylate) (PMMA) host can be obtained by the polymerization of MMA. The nonlinear absorption (NLA) properties of the G/MoS2/PMMA organic glasses were investigated by using an open-aperture Z-scan technique. The experimental results showed that the G/MoS2/PMMA organic glasses (the NLA coefficient β, was up to 2110 cm/GW) exhibited enhanced reverse saturable absorption (RSA) properties compared to G/PMMA (β = 242 cm/GW) and MoS2/PMMA (β = 365 cm/GW) organic glasses. The enhanced mechanism of RSA was analyzed in terms of the energy-level diagram of graphene and MoS2. The G/MoS2/PMMA organic glasses have very promising applications in optical devices such as optical limiters and optical shutters. |
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| Keywords: | Organic glass Reverse saturable absorption Optical limiting Z-scan |
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