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Porphyrin Chemically Modified MoS2 Quantum Dots for Solid-State Broadband Optical Limiters

Abstract

MoS2 quantum dots (MQDs) with unique electronic and optical properties are promising broadband nonlinear optical (NLO) material for ultrafast optical applications. It would be very interesting and challenging to functionalize MQDs with another hotspot optoelectronically active molecules “porphyrin”. Herein, by treating MQDs with tetraphenylporphyrin (TPP) diazonium salts, we synthesized a novel nanohybrid material, MQDs-TPP, in which TPP was covalently functionalized to the surface of MQDs via C-S linkage. To explore its solid-state broadband NLO application, the MQDs-TPP nanohybrid was encapsulated into a poly(methyl methacrylate) (PMMA) matrix for the open-aperture Z-scan measurements at 532 and 1064 nm. In contrast to MQDs/PMMA and TPP/PMMA, the MQDs-TPP/PMMA film exhibits superior nonlinear optical and optical limiting responses, with the largest nonlinear coefficients (βeff) and lowest optical limiting (OL) thresholds about 1059.17 cm GW-1 and 1.62 J cm-2 at 532 nm, and 831.13 cm GW-1 and 1.97 J cm-2 at 1064 nm.

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Publication details

The article was received on 02 Aug 2019, accepted on 07 Oct 2019 and first published on 07 Oct 2019


Article type: Communication
DOI: 10.1039/C9NR06604G
Nanoscale, 2019, Accepted Manuscript

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    Porphyrin Chemically Modified MoS2 Quantum Dots for Solid-State Broadband Optical Limiters

    P. Jiang, B. Zhang, Z. Liu and Y. Chen, Nanoscale, 2019, Accepted Manuscript , DOI: 10.1039/C9NR06604G

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