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16 条记录 (耗时 0.062 秒)

    Devices for optochemical detecting of vapors and particulates using porous photonic crystals infiltrated with sensory emissive organics
    8.
    发明授权
    Devices for optochemical detecting of vapors and particulates using porous photonic crystals infiltrated with sensory emissive organics 失效
    用感光发射有机物渗透的多孔光子晶体的蒸气和微粒的光化学检测装置

    公开(公告)号：US08330958B2

    公开(公告)日：2012-12-11

    申请号：US12702143

    申请日：2010-02-08

    申请人： Igor A. Levitsky

    发明人： Igor A. Levitsky

    IPC分类号： G01N21/00

    CPC分类号： G01N21/05 ,  G01N21/0332 ,  G01N21/6408 ,  G01N21/645 ,  G01N33/0057 ,  G01N2021/0346 ,  G01N2021/6432 ,  G01N2021/6484 ,  Y02A50/25

    摘要： An optochemical detector for detecting various chemical compounds and comprising a flow cell incorporating the sensory element constructed of an organic-inorganic emissive nanocomposite which luminescence spectral response is specific to exposed target vapors and particulates. The change in the luminescent spectral response is measured during this exposure. The detector is equipped with air-jet sampling system functioning in real-time mode for delivery of vapors and particulates to sensory element.

    摘要翻译： 一种用于检测各种化学化合物的光化学检测器，包括结合由有机 - 无机发射纳米复合材料构成的感觉元件的流动池，其发光光谱响应特定于暴露的目标蒸气和微粒。 在该曝光期间测量发光光谱响应的变化。 检测器配备有实时模式的空气喷射采样系统，用于将蒸气和颗粒传送到感觉元件。

    Optochemical sensors for the detection of low pressure vapors based on porous semiconductors and emissive organics
    9.
    发明授权
    Optochemical sensors for the detection of low pressure vapors based on porous semiconductors and emissive organics 失效
    用于检测基于多孔半导体和发射有机物的低压蒸气的光化学传感器

    公开(公告)号：US08003403B1

    公开(公告)日：2011-08-23

    申请号：US12051233

    申请日：2008-03-19

    申请人： Igor A. Levitsky

    发明人： Igor A. Levitsky

    IPC分类号： G01N21/76

    CPC分类号： G01N21/77 ,  G01N21/643 ,  G01N2021/6432 ,  G01N2021/7706 ,  G01N2021/7776 ,  G01N2021/7779 ,  G01N2021/7786

    摘要： A chemical sensor for detecting organic or inorganic target vapors and comprising a silicon member having a silicon surface with semiconductor pores therein, at least one luminescent sensory material entrapped in the semiconductor pores. The luminescent spectral material is exposed to the target vapors, wherein an excitation of the at least one luminescent sensory material results in a luminescent spectral response due to emission interference. The change in the luminescent spectral response is measured during this exposure.

    摘要翻译： 一种用于检测有机或无机目标蒸汽的化学传感器，包括具有其中具有半导体孔的硅表面的硅构件，被截留在半导体孔中的至少一种发光感官材料。 发光光谱材料暴露于目标蒸气，其中至少一种发光感官材料的激发导致由于发射干扰而引起的发光光谱响应。 在该曝光期间测量发光光谱响应的变化。

    Method for detection of organic vapors based on fluorescence enhancement in porphyrin aggregates
    10.
    发明授权
    Method for detection of organic vapors based on fluorescence enhancement in porphyrin aggregates 失效
    基于卟啉聚集体荧光增强的有机蒸气检测方法

    公开(公告)号：US06623973B2

    公开(公告)日：2003-09-23

    申请号：US09826257

    申请日：2001-04-04

    申请人： Igor A. Levitsky ,  Sergei G. Krivoshlykov

    发明人： Igor A. Levitsky ,  Sergei G. Krivoshlykov

    IPC分类号： G01N3300

    CPC分类号： G01N21/783 ,  Y10T436/163333

    摘要： A fluorescence-based method for highly sensitive and selective detection of volatile organic compounds such as vapors of benzene, alcohol, chloroform, dimethyl methylphosphonate (DMMP) that is a simulant of Sarin, Soman and other chemical warfare agents, is proposed. The method employs the effect of strong fluorescence change in thin films of aggregated porphyrins. In one preferred embodiment, the aggregation of porphyrin molecules leads to initial depression of chromophore emission due to self-quenching effect. The binding of analyte molecules to porphyrin sensitive layer forms porphyrin-analyte complexes, which destroy initial aggregate structure and induce the strong fluorescence enhancement. Aggregate-sensing films usually provide higher and faster response than porphyrins isolated in a polymer matrix. That results in strong enhancement of the florescence quantum yield and shift of the fluorescent spectrum in the direction of shorter wavelengths. The method can be used in fluorescence chemical sensors of organic vapors for different applications including environmental monitoring, control of industrial processes and medicine.

    摘要翻译： 提出了一种高灵敏度和选择性检测挥发性有机化合物的荧光法，如苯，乙醇，氯仿，甲基膦酸二甲酯（DMMP），它是Sarin，Soman和其他化学战剂的模拟物。 该方法采用凝聚卟啉薄膜强荧光变化的作用。 在一个优选的实施方案中，卟啉分子的聚集导致由于自猝灭效应而引起的发色团发射的初始抑制。 分析物分子与卟啉敏感层的结合形成卟啉 - 分析物复合物，其破坏初始聚集体结构并诱导强荧光增强。 聚合物传感膜通常提供比分离在聚合物基质中的卟啉更高和更快的响应。 这导致荧光量子产率的强烈增强和荧光光谱在较短波长方向上的移动。 该方法可用于有机蒸汽的荧光化学传感器，用于不同的应用，包括环境监测，工业过程控制和医药。