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Polymer functionalized antimony sulfide quantum dots for broadband optical limiting
Nanoscale ( IF 5.8 ) Pub Date : 2024-09-11 , DOI: 10.1039/d4nr02549k
Guangwei Li 1 , Qian Chen 1, 2 , Ningning Dong 3, 4 , Haidong He 2 , Jun Wang 3, 4 , Yu Chen 1
Affiliation  

The rapid development of zero-dimensional quantum dots-based nanotechnology has motivated the design and synthesis of novel nano-functional materials for optoelectronic and photonic devices in recent years. Antimony sulfide (Sb2S3) quantum dots (SQDs), with an average diameter of 3.22 nm, were prepared via a top-down liquid ultrasonication exfoliation technique. Highly soluble poly(N-vinylcarbazole)-covalently functionalized SQDs (SQDs-PVK) were synthesized in situ by reversible addition fragmentation chain transfer polymerization, and embedded into a non-optically active poly(methylmethacrylate) (PMMA) matrix giving the SQDs-PVK/PMMA film. The annealed SQDs-PVK/PMMA film showed exceptional nonlinear optical performance, with large nonlinear absorption coefficients of 713.71 cm GW−1 at 532 nm and 913.60 cm GW−1 at 1064 nm, and small limiting thresholds of 1.44 J cm−2 at 532 nm and 1.08 J cm−2 at 1064 nm. These advantages make SQDs-PVK one of the promising candidates for a broadband optical limiter in both the near-infrared and visible ranges.

中文翻译:


用于宽带光限幅的聚合物功能化硫化锑量子点



近年来,基于零维量子点的纳米技术的快速发展推动了用于光电和光子器件的新型纳米功能材料的设计和合成。通过自上而下的液体超声剥离技术制备了平均直径为3.22 nm的硫化锑(Sb 2 S 3 )量子点(SQD)。通过可逆加成断裂链转移聚合原位合成高溶解性聚( N-乙烯基咔唑)共价功能化SQD(SQDs-PVK),并将其嵌入非光学活性聚(甲基丙烯酸甲酯)(PMMA)基质中得到SQDs-PVK /PMMA 薄膜。退火后的SQDs-PVK/PMMA薄膜表现出优异的非线性光学性能,在532 nm处具有713.71 cm GW -1的大非线性吸收系数,在1064 nm处具有913.60 cm GW -1的大非线性吸收系数,在532 nm处具有1.44 J cm -2的小限制阈值。 nm 处,1064 nm 处为 1.08 J cm -2 。这些优点使 SQD-PVK 成为近红外和可见光范围内宽带光限幅器的有前途的候选者之一。
更新日期:2024-09-11
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