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Surface-Activated Nanoparticles for Controlled Light-Responsiveness

机译：用于控制光响应性的表面活化纳米颗粒

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摘要

Most of the optical properties of nanoparticles (NPs) depend on a nonad-ditive effect, where there is a maximum (or optimum) value at a specific distance from the NP surface (proximity length). However, knowledge on the relation between the specific surface layer and light responsiveness of NPs is limited. In this study, surface properties of NPs are modulated by electron beam (e-beam) treatment together with ionic control of the NP surface and dispersing media. The surface modification in terms of the proximity length is found to be critical to the selective enhancement of light absorbance in the ultraviolet-visible (UV-vis) and terahertz (THz) regions. In particular, the non-temporarily electron-activated NPs absorb short wavelength UV-vis light, rendering them particulary advantageous for solar energy use. The control over the physical properties of general light-responsive NPs is a new approach to designing solar-energy-based technologies.
机译：纳米粒子（NPs）的大多数光学特性取决于非加合效应，即在距NP表面特定距离（接近长度）处有一个最大值（或最佳值）。然而，关于比表面层和NP的光响应性之间的关系的知识是有限的。在这项研究中，NPs的表面性质通过电子束（电子束）处理以及NP表面和分散介质的离子控制来调节。发现在接近长度方面的表面改性对于选择性增强紫外可见（UV-vis）和太赫兹（THz）区域中的吸光度至关重要。特别地，非临时电子激活的NP吸收短波长的紫外线可见光，使其特别有利于太阳能的使用。控制一般的光敏NP的物理特性是设计基于太阳能的技术的一种新方法。

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  • 来源
    《Advanced Functional Materials》 |2013年第17期|2212-2217|共6页
  • 作者

    Sungsook Ahn; Sung Yongjung; Sangjoon Lee;

  • 作者单位

    Department of Mechanical Engineering Pohang University of Science and Technology Pohang, 790-784, South Korea;

    Department of Mechanical Engineering Pohang University of Science and Technology Pohang, 790-784, South Korea;

    Department of Mechanical Engineering Pohang University of Science and Technology Pohang, 790-784, South Korea,Center for Biofluid and Biomimic Research Pohang University of Science and Technology Pohang, 790-784, South Korea,Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang, 790-784, South Korea;

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