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Nanostructured Porous Silicon-Optical Properties,Surface Modification and Sensor Applications

机译：纳米结构多孔硅的光学性质，表面修饰和传感器应用

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摘要

Porous silicon is a very attractive material due to its intense visible photoluminescence at room temperature.Its unique physical and chemical properties are determined by the porous structure where a nanosized silicon layer is formed during the electrochemical etching of crystalline silicon.So far,the high chemical reactivity of the porous silicon surface has prevented its extensive application in optoelectronics.Considerable effort has been put into the development of suitable techniques of stabilization.On the other hand,high chemical reactivity and sorption capacity of porous silicon represent the principal advantage for the construction of sensitive sensors of chemical species.This article provides a brief overview of the ongoing activities in the development of porous-silicon-based chemical sensors at the Charles University and at the Institute of Chemical Technology.So far,the detection of chemical species is based on the measurement of the changes in photoluminescence intensity and photoluminescence decay time,other complementary electrochemical and optical detection methods will follow in order to increase the selectivity of the detection.Another approach resulting in increased selectivity of sensor response utilizes the modification of porous silicon surface-either by physical adsorption or chemical derivatization-by various molecules with recognition properties.Due to the interdisciplinary nature of the research the involved scientists have built a network of collaborating laboratories specialized in various fields-material research,surface chemistry,design and synthesis of the molecules with recognition properties and sensor development,
机译：多孔硅由于在室温下具有强烈的可见光致发光性，因此是一种非常有吸引力的材料。其独特的物理和化学性质取决于多孔结构，其中在结晶硅的电化学蚀刻过程中形成了纳米级硅层。多孔硅表面的反应性阻碍了其在光电子学中的广泛应用。已为开发合适的稳定化技术付出了相当大的努力。另一方面，多孔硅的高化学反应性和吸附能力代表了其结构的主要优势。本文简要概述了查尔斯大学和化学技术研究所在开发基于多孔硅的化学传感器方面正在进行的活动。到目前为止，化学物质的检测基于测量光致发光强度的变化和光致发光衰减时间，将采用其他互补的电化学和光学检测方法以提高检测的选择性。另一种导致传感器响应选择性提高的方法是通过物理吸附或化学衍生化修饰多孔硅表面具有研究性质的各种分子。由于研究的跨学科性质，参与的科学家建立了一个合作实验室网络，专门研究各个领域，包括材料研究，表面化学，具有识别性质的分子的设计和合成以及传感器开发，

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  • 来源
    《Chimia》 |2005年第5期|p.222-225|共4页
  • 作者

    Ivan Jelinek; Tomas Chvojka; Vladimfr Vrkoslav; Jindfich Jindfich; Miroslav Lorenc; Daniel Niznansky; Ivan Nemec; Vladimfr Kral; Juraj Dian;

  • 作者单位

    Department of Analytical Chemistry Faculty of Sciences Charles University Prague Hlavova 8/2030 Prague 2,12842 Czech Republic;

    Department of Analytical Chemistry Faculty of Sciences Charles University Prague Hlavova 8/2030 Prague 2,12842 Czech Republic;

    Department of Analytical Chemistry Faculty of Sciences Charles University Prague Hlavova 8/2030 Prague 2,12842 Czech Republic;

    Department of Organic Chemistry Charles University Prague Czech Republic;

    Department of Organic Chemistry Charles University Prague Czech Republic;

    Department of Inorganic Chemistry Charles University Prague Czech Republic;

    Department of Inorganic Chemistry Charles University Prague Czech Republic;

    Department of Analytical Chemistry Institute of Chemical Technology Prague Czech Republic;

    Department of Chemical Physics and Optics Faculty of Mathematics and Physics Charles University Prague Czech Republic;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

    Optical sensor; Photoluminescence quenching; Porous silicon; Recognition enhancement;

    机译：光学传感器;光致发光猝灭;多孔硅;识别增强;

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