Fluorescence enhancement of the conjugated polymer films based on well-ordered Au nanoparticle arrays

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• 作者：Benbin Zhong ; Xihong Zu ; Guobin Yi ; Hailiang Huang…
• 关键词：Fluorescence enhancement ; Poly(3 ; hexylthiophene) ; Nanoparticle array ; Block copolymer ; Self ; assemble ; Photonics applications
• 刊名：Journal of Nanoparticle Research
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：18
• 期：9
• 全文大小：3,572 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Nanotechnology
  Inorganic Chemistry
  Characterization and Evaluation Materials
  Physical Chemistry
  Applied Optics, Optoelectronics and Optical Devices
  
• 出版者：Springer Netherlands
• ISSN：1572-896X
• 卷排序：18

文摘

In this paper, well-ordered Au nanoparticle arrays on silicon substrates were employed as efficient metal-enhanced fluorescence (MEF) substrates for investigating the fluorescence properties of the conjugated polymer poly(3-hexylthiophene) (P3HT). The ordered Au nanoparticle arrays were fabricated by block copolymer self-assembly technology, and the particle sizes were controlled by adjusting the molar ratios of HAuCl₄ precursor to vinyl pyridine units. The approach is economical and suitable to fabricate large-area MEF substrates. The results about fluorescence properties of P3HT showed that the fluorescence intensities of the P3HT films were improved on ordered Au nanoparticle arrays compared to those on bare silicon substrate and were significantly enhanced with the Au nanoparticle sizes increasing. The mechanism is based on localized surface plasmon resonances, coupling and propagating surface plasmons, and the emission enhancement mainly resulted from the increase of the excitation rate. This work provides a new way to prepare efficient MEF substrates for high-performance fluorescence-based devices.