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The sound of light: An open environment photoacoustic identification of surface adsorbed molecules.

机译:光的声音:在开放环境下对表面吸附的分子进行光声识别。

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摘要

A novel form of open environment photoacoustic spectroscopy was presented. The technique was first applied toward standoff detection of trace surface residues with concentrations as low as 100 ng/cm2. The maximum standoff distance attained was 50 meters under laboratory conditions. The technique was then utilized in a point sensor geometry at concentrations slightly lower than those achieved in standoff.;In the present work, the accomplishments include the usage of mechanical oscillators to detect pulses of light, standoff and point sensor geometries showing a wide range of applications for the technique, detection of trace chemical and biological residues at the 100 ng/cm2 concentrations, standoff distances of up to 50 meters, and the ability to distinguish target molecules on a variety of real surfaces. The main analyte focus was placed on the detection of explosive and nuclear proliferation compounds including cyclotrimethylenetrinitromine (RDX), trinitrotoluene (TNT), pentaerythritol tetranitrate (PETN), and tributyl phosphate (TBP). Biological compounds were also presented with the goal to distinguish the difference between benign and malignant cells in a standoff manner.
机译:提出了一种新颖形式的开放环境光声光谱。该技术首先应用于痕量表面残留物的隔离检测,其浓度低至100 ng / cm2。在实验室条件下,获得的最大隔离距离为50米。然后将该技术用于点传感器几何体,其浓度略低于对峙所达到的浓度。在当前工作中,成就包括使用机械振荡器来检测光脉冲,对峙和点传感器几何体,这些几何体显示出很大的范围。该技术的应用,检测浓度为100 ng / cm2的痕量化学和生物残留物,最大50米的对峙距离以及在各种真实表面上区分目标分子的能力。分析物的主要重点是爆炸性和核扩散化合物的检测,包括环三亚甲基三亚硝胺(RDX),三硝基甲苯(TNT),季戊四醇四硝酸酯(PETN)和磷酸三丁酯(TBP)。还提出了生物化合物的目的是以对峙的方式区分良性和恶性细胞之间的差异。

著录项

  • 作者

    Van Neste, Charles William.;

  • 作者单位

    Tennessee Technological University.;

  • 授予单位 Tennessee Technological University.;
  • 学科 Chemistry Physical.;Physics Acoustics.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 132 p.
  • 总页数 132
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地下建筑;
  • 关键词

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