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首页> 外文期刊>Materials Chemistry and Physics >Optical and morphological properties of infrared emitting functionalized silica nanoparticles
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Optical and morphological properties of infrared emitting functionalized silica nanoparticles

机译：红外发射功能化二氧化硅纳米粒子的光学和形态学性质

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摘要

The loading process of functionalized silica nanoparticles was investigated in order to obtain nanoparticles having functional groups on their surface and Near-Infrared (NIR) emission properties. The NIR emission induced by O_2 loading was studied in silica nanoparticles, produced by pyrogenic and micro-emulsion methods, with size ranging from 20 to 120 nm. Loading was carried out by thermal treatments in O_2 atmosphere up to 400 ℃ and 90 bar. The effects of the thermal treatments on the NIR emission and on the structural properties were studied by luminescence and Raman techniques, whereas the morphological features were investigated by Transmission Electron Microscopy and Atomic Force Microscopy. Our data show that silica nanoparticles produced by pyrogenic technique can be loaded with O_2 at lower temperature than the ones obtained by microemulsion and have a higher luminescence intensity due to the internal porosity of the latter. The treatments do not affect the nanosize of the microemulsion particles and provide NIR emitting probes of selected size. Post-processing surface functionalization of the pyrogenic nanoparticles does not affect their emission properties and provides high efficiency NIR emitters with functionalized surface.
机译：为了获得在其表面上具有官能团和近红外（NIR）发射特性的纳米颗粒，研究了官能化的二氧化硅纳米颗粒的加载过程。在热解法和微乳液法制备的二氧化硅纳米粒子中，研究了由O_2负载引起的NIR发射，其粒径范围为20至120 nm。通过在高达400℃和90 bar的O_2气氛中进行热处理来加载。通过发光和拉曼技术研究了热处理对近红外发射和结构性能的影响，而通过透射电子显微镜和原子力显微镜研究了形态特征。我们的数据表明，通过热解技术生产的二氧化硅纳米颗粒可以在比通过微乳液获得的温度更低的温度下负载O_2，并且由于后者的内部孔隙率而具有更高的发光强度。这些处理不会影响微乳液颗粒的纳米尺寸，并提供选定尺寸的NIR发射探针。热解纳米粒子的后处理表面功能化不影响其发射性能，并提供具有功能化表面的高效NIR发射器。

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  • 来源
    《Materials Chemistry and Physics》 |2013年第3期|763-769|共7页
  • 作者

    G. Iovino; M.A. Malvindi; S. Agnello; G. Buscarino; A. Alessi; P.P. Pompa; E.M. Gelardi;

  • 作者单位

    Dipartimento di Fisica e Chimica, Universita di Palermo, Via Archirafi 36, I-90123 Palermo, Italy;

    Istituto Italiano di Tecnologia, Center for Bio-Molecular Nanotechnologies@Unile, Via Barsanti, Amesano, I-73010 Lecce, Italy;

    Dipartimento di Fisica e Chimica, Universita di Palermo, Via Archirafi 36, I-90123 Palermo, Italy;

    Dipartimento di Fisica e Chimica, Universita di Palermo, Via Archirafi 36, I-90123 Palermo, Italy;

    Dipartimento di Fisica e Chimica, Universita di Palermo, Via Archirafi 36, I-90123 Palermo, Italy;

    Istituto Italiano di Tecnologia, Center for Bio-Molecular Nanotechnologies@Unile, Via Barsanti, Amesano, I-73010 Lecce, Italy;

    Dipartimento di Fisica e Chimica, Universita di Palermo, Via Archirafi 36, I-90123 Palermo, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Amorphous materials; Optical materials; Nanostructures; Heat treatment; Luminescence;

    机译：非晶态材料;光学材料;纳米结构;热处理;发光性;

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