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MoS2 quantum dots chemically modified with porphyrin for solid-state broadband optical limiters

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Abstract

MoS2 quantum dots (MQDs) with unique electronic and optical properties are promising broadband nonlinear optical (NLO) materials for ultrafast optical applications. It would be very interesting and challenging to functionalize MQDs with another hotspot optoelectronically active molecule “porphyrin”. Herein, by treating MQDs with tetraphenylporphyrin (TPP) diazonium salts, we synthesized a novel nanohybrid material, MQD-TPP, in which TPP was covalently functionalized to the surface of MQDs via a C–S linkage. To explore its solid-state broadband NLO application, the MQD-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 MQD-TPP/PMMA film exhibited superior nonlinear optical and optical limiting responses with the largest nonlinear coefficients (βeff) and the lowest optical limiting (OL) thresholds of 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, respectively.

Graphical abstract: MoS2 quantum dots chemically modified with porphyrin for solid-state broadband optical limiters

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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, Advance Article

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    MoS2 quantum dots chemically modified with porphyrin for solid-state broadband optical limiters

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

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