Issue 45, 2017

MoS2 nanosheets covalently functionalized with polyacrylonitrile: synthesis and broadband laser protection performance

Abstract

Highly soluble polyacrylonitrile (PAN)-covalently grafted MoS2 nanosheets (MoS2–PAN) were synthesized in situ through reversible addition fragmentation chain transfer (RAFT) polymerization. In comparison with MoS2 and the MoS2/PAN blends, whether in solution or in a PMMA matrix, the MoS2–PAN-based samples show superior optical limiting response in the visible and near-infrared ranges. After annealing at 200 °C in N2 for 4 hours, the annealed MoS2–PAN/PMMA film exhibits significantly enhanced nonlinear optical and optical limiting responses when compared to the non-annealed MoS2–PAN/PMMA film. The observed nonlinear coefficients of the MoS2–PAN/PMMA film are changed from 1015 cm GW−1 at 532 nm and 534 cm GW−1 at 1064 nm before annealing to 1151 cm GW−1 at 532 nm and 699 cm GW−1 at 1064 nm after annealing. The limiting thresholds were also decreased from 1.98 J cm−1 at 532 nm and 3.60 J cm−1 at 1064 nm before annealing to 1.56 J cm−1 at 532 nm and 2.67 J cm−1 at 1064 nm after annealing.

Graphical abstract: MoS2 nanosheets covalently functionalized with polyacrylonitrile: synthesis and broadband laser protection performance

Article information

Article type
Paper
Submitted
26 Aug 2017
Accepted
30 Oct 2017
First published
31 Oct 2017

J. Mater. Chem. C, 2017,5, 11920-11926

MoS2 nanosheets covalently functionalized with polyacrylonitrile: synthesis and broadband laser protection performance

M. Shi, N. Dong, N. He, Y. Wan, H. Cheng, M. Han, J. Wang and Y. Chen, J. Mater. Chem. C, 2017, 5, 11920 DOI: 10.1039/C7TC03900J

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