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Raman scattering enhancement of a single ZnO nanorod decorated with Ag nanoparticles: synergies of defects and plasmons

机译:拉曼散射增强单个ZnO纳米棒用Ag纳米粒子装饰:缺陷和等离子体的协同作用

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摘要

Surface-enhanced Raman scattering (SERS) of a single ZnO nanorod (NR) is demonstrated by coating with Ag nanoparticles (NPs). An enhancement factor of 1.2 x 10(3) and 4.4 x 10(2) has been obtained for E-2 (high) mode (437 cm(-1)) and A(1) (TO) mode (378 cm(-1)), respectively. Electron paramagnetic resonance measurements reveal an unintentional donor state in ZnO NRs. The enhancement of deep-level emission and micro-absorption mapping of a single ZnO NR further confirms the presence of the donor state. The SERS is believed to result from the charge transfer between ZnO NRs and Ag NPs, which can be enhanced by the empty donor state in ZnO. Finally, single ZnO NRs coated with Ag can be used as good SERS substrates for small molecule detection. This Letter highlights the interaction between point defects and the SERS effect down to a single semiconductor NR. (C) 2018 Optical Society of America
机译:通过用Ag纳米颗粒(NPS)涂覆单ZnO纳米棒(NR)的表面增强拉曼散射(SERS)。 已经获得了1.2×10(3)和4.4×10(2)的增强因子(437cm(-1))和A(1)(至)模式(378厘米( - 1))分别。 电子顺磁共振测量显示ZnO NRS中的无意供体状态。 增强单个ZnO NR的深层发射和微吸收映射进一步证实了供体状态的存在。 SERS被认为是由ZnO NRS和AG NP之间的电荷转移产生,这可以通过ZnO中的空供体状态增强。 最后,涂有AG的单个ZnO NR可用作小分子检测的良好SERS基材。 这封信突出了点缺陷之间的交互,并且SERS效应到单个半导体NR。 (c)2018年光学学会

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  • 来源
    《Optics Letters》 |2018年第10期|共4页
  • 作者单位

    Shenzhen Univ Coll Optoelect Engn Shenzhen Key Lab Laser Engn Guangdong Prov Key Lab Micro Nano Optomechatron Shenzhen 518060 Peoples R China;

    Shenzhen Univ Coll Optoelect Engn Shenzhen Key Lab Laser Engn Guangdong Prov Key Lab Micro Nano Optomechatron Shenzhen 518060 Peoples R China;

    Shenzhen Univ Coll Optoelect Engn Shenzhen Key Lab Laser Engn Guangdong Prov Key Lab Micro Nano Optomechatron Shenzhen 518060 Peoples R China;

    Shenzhen Univ Int Collaborat Lab Mat Optoelect Sci &

    Technol 2D Shenzhen Peoples R China;

    Shenzhen Univ Coll Optoelect Engn Shenzhen Key Lab Laser Engn Guangdong Prov Key Lab Micro Nano Optomechatron Shenzhen 518060 Peoples R China;

    Shenzhen Univ Coll Optoelect Engn Shenzhen Key Lab Laser Engn Guangdong Prov Key Lab Micro Nano Optomechatron Shenzhen 518060 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
  • 关键词

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