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Development of near infrared responsive material based on silica encapsulated gold nanoparticles

机译：基于二氧化硅包裹的金纳米粒子的近红外响应材料的开发

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摘要

In this research, the silica encapsulated gold nanoparticles with optical resonance located in 700850 nm spectral region were synthesized by combining gold core and the silica shell. The synthesized composite particles can be potentially used in biological fields, due to the biocompatibility of gold, silica and biopolymers. Nano-gold, which can act a raw material of composite particles, was fabricated by stand citrate reduction method. Then, the polyvinyl pyrrolidone (PVP) and (3mercaptopropyl)trimethoxysilane (MPTMS) are added to deposit silica shell and control particle size. Finally, a complete silica nanoshell was formed on the gold surface by the one-step method, without a repeated coating process. The controllable absorption wavelength of nano-composite particles can be easily controlled by the concentration ratio of PVP and MPTMS. Transmission electron microscopy (TEM) images and optical absorption spectra clearly showed that silica was successfully deposited onto the gold surface by this novel method. As the decreasing aggregation of gold core by adding PVP, the optical plasmon peaks became blue-shifted, but the optical plasmon resonance became red-shifted and the absorption spectra were functions of addition ratios by MPTMS. We expect to extend these functional nanoparticles for real sample applications in the near future.
机译：在这项研究中，通过结合金核和二氧化硅壳，合成了在700850 nm光谱范围内具有光学共振的二氧化硅包裹的金纳米粒子。由于金，二氧化硅和生物聚合物的生物相容性，合成的复合颗粒可潜在地用于生物领域。采用柠檬酸盐还原法制备了可以作为复合颗粒原料的纳米金。然后，添加聚乙烯基吡咯烷酮（PVP）和（3-巯基丙基）三甲氧基硅烷（MPTMS）以沉积二氧化硅壳并控制粒径。最后，通过一步法在金表面上形成完整的二氧化硅纳米壳，而无需重复涂覆过程。通过PVP和MPTMS的浓度比可以容易地控制纳米复合颗粒的可控制吸收波长。透射电子显微镜（TEM）图像和光吸收光谱清楚地表明，通过这种新方法，二氧化硅成功地沉积在金表面。随着PVP的加入，金核的聚集逐渐减少，光等离子体激元峰发生蓝移，而光等离子体激元共振发生红移，吸收光谱是MPTMS加成率的函数。我们希望在不久的将来将这些功能纳米颗粒扩展到实际样品应用中。

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  • 来源
    《》|2009年|p.1-7|共7页
  • 会议地点 Xiangtan(CN);Xiangtan(CN)
  • 作者

    Huang Chih Lu; I Shou Tsai; Yu Hsiang Lin;

  • 作者单位

    Nanotechnology Research Center,Feng Chia University,Taiwan;

    Nanotechnology Research Center,Feng Chia University,Taiwan Department of Fiber and Composite Material,Feng Chia University,Taiwan;

    Department of Fiber and Composite Material,Feng Chia University,Taiwan;

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

    nanoparticle; optical plasmon resonance; PVP; MPTMS; gold; silica;

    机译：纳米粒子等离子体共振; PVP; MPTMS;金;二氧化硅;

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