Al-oxide/PMMA异质结构增强PbS量子点的放大等离子体发射

IF 2.5 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
S. M. Sadeghi, Rithvik R. Gutha, C. Sharp
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引用次数: 1

摘要

研究了氧化铝/聚甲基丙烯酸甲酯(PMMA)界面对红外半导体量子点(QDs)等离子体发射增强的影响。为此,将嵌入PMMA基体中的PbS量子点沉积在由Au薄膜、介电间隔层和超薄氧化铝层组成的异质结构的顶部。我们的研究结果表明,这种结构可以支持发射增强,远远超过直接将量子点/PMMA薄膜放置在Au薄膜/介电间隔片上的情况,即在没有氧化铝的情况下。我们还证明了Au/Si/Al氧化物/PMMA异质结构可以增加PbS量子点的光诱导荧光增强,使它们在激光场照射下更亮。我们从等离子体场增强(Purcell效应)和在氧化铝/PMMA界面形成的羧酸阴离子键的综合效应方面讨论了这些结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Amplified plasmonic emission enhancement of PbS quantum dots via Al-oxide/PMMA heterostructures
We study the impact of Al oxide/Poly(methyl methacrylate) (PMMA) interface on plasmonic emission enhancement of infrared semiconductor quantum dots (QDs). For this, PbS QDs embedded in PMMA matrix are deposited on the top of heterostructures consisting of a Au thin film, a dielectric spacer, and an ultrathin layer of Al oxide. Our results suggest that such structures can support an emission enhancement far more than what can be reached in the cases when the QDs/PMMA films are placed on Au thin film/dielectric spacer directly, i.e. in the absence of the Al oxide. We also demonstrate that Au/Si/Al oxide/PMMA heterostructures can increase the photo-induced fluorescence enhancement of PbS QDs, making them brighter as they are irradiated with a laser field. We discuss these results in terms of combined effects of plasmonic field enhancement (Purcell effect) and the carboxylate anion bonds formed at the Al oxide/PMMA interface.
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来源期刊
Nano Futures
Nano Futures Chemistry-General Chemistry
CiteScore
4.30
自引率
0.00%
发文量
35
期刊介绍: Nano Futures mission is to reflect the diverse and multidisciplinary field of nanoscience and nanotechnology that now brings together researchers from across physics, chemistry, biomedicine, materials science, engineering and industry.
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