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首页> 外文期刊>Advanced Materials >Unprecedented Surface Plasmon Modes in Monoclinic MoO_2 Nanostructures
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Unprecedented Surface Plasmon Modes in Monoclinic MoO_2 Nanostructures

机译：单克式MOO_2纳米结构中前所未有的表面等离子体模式

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摘要

Developing stable plasmonic materials featuring earth-abundant compositions with continuous band structures, similar to those of typical metals, has received special research interest. Owing to their metal-like behavior, monoclinic MoO2 nanostructures have been found to support stable and intense surface plasmon (SP) resonances. However, no progress has been made on their energy and spatial distributions over individual nanostructures, nor the origin of their possibly existing specific SP modes. Here, various MoO2 nanostructures are designed via polydopamine chemistry and managed to visualize multiple longitudinal and transversal SP modes supported by the monoclinic MoO2, along with intrinsic interband transitions, using scanning transmission electron microscopy coupled with ultrahigh-resolution electron energy loss spectroscopy. The identified geometry-dependent SP energies are tuned by either controlling the shape and thickness of MoO2 nanostructures through their well-designed chemical synthesis, or by altering their length using a developed electron-beam patterning technique. Theoretical calculations reveal that the strong plasmonic behavior of the monoclinic MoO2 is associated with the abundant delocalized electrons in the Mo d orbitals. This work not only provides a significant improvement in imaging and tailoring SPs of nonconventional metallic nanostructures, but also highlights the potential of MoO2 nanostructures for micro-nano optical and optoelectronic applications.
机译：开发稳定的等离子体材料，具有与典型金属类似的连续带结构的地球丰富的组合物，已经获得了特殊的研究兴趣。由于它们的金属状行为，已发现单斜螺母MOO2纳米结构支持稳定和强烈的表面等离子体（SP）共振。然而，在各个纳米结构上的能量和空间分布中没有取得进展，也没有取代可能现有的特定SP模式的起源。这里，各种MOO2纳米结构通过聚二胺化学设计，并设法使用扫描透射电子显微镜与超高分辨率电子能量损失光谱耦合的扫描透射电子显微镜，可视化由单斜晶MOO2支撑的多个纵向和横向SP模式。通过通过精心设计的化学合成来控制Moo2纳米结构的形状和厚度来调节所识别的几何依赖性SP能量，或者通过使用显影的电子束图案化技术改变它们的长度。理论计算表明，单斜螺母2的强等离子体行为与MO D轨道中的丰富的分层电子相关联。这项工作不仅提供了非转化金属纳米结构的成像和剪裁SP的显着改善，而且还突出了MOO2纳米结构对微纳米光学和光电应用的潜力。

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  • 来源
    《Advanced Materials》 |2020年第19期|1908392.1-1908392.9|共9页
  • 作者

    Zhu Yun-Pei; El-Demellawi Jehad K.; Yin Jun; Lopatin Sergei; Lei Yongjiu; Liu Zhixiong; Miao Xiaohe; Mohammed Omar F.; Alshareef Husam N.;

  • 作者单位

    King Abdullah Univ Sci & Technol Mat Sci & Engn Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci & Technol Mat Sci & Engn Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci & Technol Div Phys Sci & Engn Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci & Technol Core Labs Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci & Technol Mat Sci & Engn Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci & Technol Mat Sci & Engn Thuwal 239556900 Saudi Arabia;

    Westlake Univ Hangzhou 310024 Zhejiang Peoples R China;

    King Abdullah Univ Sci & Technol Div Phys Sci & Engn Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci & Technol Mat Sci & Engn Thuwal 239556900 Saudi Arabia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    energy mapping; high-resolution EELS; nanostructure patterning; STEM; surface plasmons;

    机译：能量映射;高分辨率鳗鱼;纳米结构图案化;茎;表面等离子体;

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