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Thickness-dependent surface plasmon resonance of ITO nanoparticles for ITO/In-Sn bilayer structure

机译：ITO / IN-SN双层结构ITO纳米粒子的厚度依赖性表面等离子体共振

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摘要

Tuning the localized surface plasmon resonance (LSPR) in doped semiconductor nanoparticles (NPs), which represents an important characteristic in LSPR sensor applications, still remains a challenge. Here, indium tin oxide/indium tin alloy (ITO/In-Sn) bilayer films were deposited by electron beam evaporation and the properties, such as the LSPR and surface morphology, were investigated by UV-VIS-NIR double beam spectrophotometer and atomic force microscopy (AFM), respectively. By simply engineering the thickness of ITO/In-Sn NPs without any microstructure fabrications, the LSPR wavelength of ITO NPs can be tuned by a large amount from 858 to 1758 nm. AFM images show that the strong LSPR of ITO NPs is closely related to the enhanced coupling between ITO and In-Sn NPs. Blue shifts of ITO LSPR from 1256 to 1104 nm are also observed in the as-annealed samples due to the higher free carrier concentration. Meanwhile, we also demonstrated that the ITO LSPR in ITO/In-Sn NPs structures has good sensitivity to the surrounding media and stability after 30 d exposure in air, enabling its application prospects in many biosensing devices.
机译：调谐在掺杂半导体纳米颗粒（NP）的局域型表面等离子体共振（LSPR），其表示在LSPR传感器应用的一个重要特征，仍然是一项挑战。这里，氧化铟锡/铟锡合金（ITO / In-Sn系）双层膜通过电子束蒸发和性质，如LSPR和表面形态沉积，通过UV-VIS-NIR双光束分光光度计和原子力进行了调查显微镜（AFM），分别。通过简单地工程ITO / In-Sn系NP的厚度而没有任何微结构捏造，ITO NP的LSPR波长可以通过大量地调谐从858至1758纳米。 AFM图像表明，ITO NP的强LSPR是密切相关的ITO和In-Sn系的NP之间的增强耦合。 ITO LSPR的蓝移1256年至1104年纳米的的作为退火样品中也观察到由​​于较高的自由载流子浓度。同时，我们还证明了ITO LSPR在ITO / In-Sn系的NP结构具有与周围介质和之后在空气中30 d曝光稳定性良好的灵敏度，使得能够在许多生物传感装置中的应用前景。

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  • 来源
    《Nanotechnology》 |2018年第1期|共10页
  • 作者

    Wei Wenzuo; Hong Ruijin; Jing Ming; Shao Wen; Tao Chunxian; Zhang Dawei;

  • 作者单位

    Univ Shanghai Sci &

    Technol Engn Res Ctr Opt Instruments &

    Syst Minist Educ 516 Jungong Rd Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Engn Res Ctr Opt Instruments &

    Syst Minist Educ 516 Jungong Rd Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Engn Res Ctr Opt Instruments &

    Syst Minist Educ 516 Jungong Rd Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Engn Res Ctr Opt Instruments &

    Syst Minist Educ 516 Jungong Rd Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Engn Res Ctr Opt Instruments &

    Syst Minist Educ 516 Jungong Rd Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Engn Res Ctr Opt Instruments &

    Syst Minist Educ 516 Jungong Rd Shanghai 200093 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    localized surface plasmon resonance; LSPR sensitivity; LSPR stability; plasmonic materials;

    机译：局部表面等离子体共振;LSPR敏感性;LSPR稳定性;等离子体材料;

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