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85 条记录 (耗时 0.038 秒)

    Polymer/plasticizer based sensors
    41.
    发明授权
    Polymer/plasticizer based sensors 有权
    基于聚合物/增塑剂的传感器

    公开(公告)号：US06752964B1

    公开(公告)日：2004-06-22

    申请号：US09338339

    申请日：1999-06-22

    申请人： Robert H. Grubbs ,  Nathan S. Lewis ,  Adam J. Matzger

    发明人： Robert H. Grubbs ,  Nathan S. Lewis ,  Adam J. Matzger

    IPC分类号： G01N2700

    CPC分类号： G01N27/126 ,  G01N33/0031

    摘要： This invention relates to a novel class of vapor sensors with tunable properties. More particularly, this invention relates to vapor sensors modified by the addition of a compatible small molecule of low volatility, i.e., a plasticizer. In certain aspects, the invention relates to a sensor for detecting an analyte in a fluid comprising: an organic polymer; a plasticizer combined with the organic polymer; and detector operatively associated with the organic polymer.

    摘要翻译： 本发明涉及具有可调谐性质的新型蒸气传感器。 更具体地说，本发明涉及通过加入低挥发性的相容小分子即增塑剂来改进的蒸气传感器。 在某些方面，本发明涉及一种用于检测流体中分析物的传感器，包括：有机聚合物; 增塑剂与有机聚合物结合; 和可操作地与有机聚合物相关的检测器。

    Sensor arrays for detecting analytes in fluids
    45.
    发明授权
    Sensor arrays for detecting analytes in fluids 失效

    公开(公告)号：US5959191A

    公开(公告)日：1999-09-28

    申请号：US6279

    申请日：1998-01-13

    申请人： Nathan S. Lewis ,  Michael S. Freund

    发明人： Nathan S. Lewis ,  Michael S. Freund

    IPC分类号： G01N27/12 ,  G01N33/00 ,  G01N33/02 ,  G01N33/14 ,  G01N33/497 ,  B32B5/00 ,  G01N27/26

    CPC分类号： G01N27/126 ,  G01N33/0031 ,  G01N33/497 ,  Y10S435/817

    摘要： Chemical sensors for detecting analytes in fluids comprise first and second conductive elements (e.g. electrical leads) electrically coupled to and separated by a chemically sensitive resistor which provides an electrical path between the conductive elements. The resistor comprises a plurality of alternating nonconductive regions (comprising a nonconductive organic polymer) and conductive regions (comprising a conductive material) transverse to the electrical path. The resistor provides a difference in resistance between the conductive elements when contacted with a fluid comprising a chemical analyte at a first concentration, than when contacted with a fluid comprising the chemical analyte at a second different concentration. Arrays of such sensors are constructed with at least two sensors having different chemically sensitive resistors providing dissimilar such differences in resistance. Variability in chemical sensitivity from sensor to sensor is provided by qualitatively or quantitatively varying the composition of the conductive and/or nonconductive regions. An electronic nose for detecting an analyte in a fluid may be constructed by using such arrays in conjunction with an electrical measuring device electrically connected to the conductive elements of each sensor.

    LOCALIZED DEPOSITION OF POLYMER FILM ON NANOCANTILEVER CHEMICAL VAPOR SENSORS BY SURFACE-INITIATED ATOM TRANSFER RADICAL POLYMERIZATION
    50.
    发明申请
    LOCALIZED DEPOSITION OF POLYMER FILM ON NANOCANTILEVER CHEMICAL VAPOR SENSORS BY SURFACE-INITIATED ATOM TRANSFER RADICAL POLYMERIZATION 有权
    通过表面引发的原子转移自由基聚合在聚合物膜上定位沉积在纳米化学气相传感器上

    公开(公告)号：US20130098141A1

    公开(公告)日：2013-04-25

    申请号：US13419510

    申请日：2012-03-14

    申请人： Heather McCaig ,  Edward B. Myers ,  Michael L. Roukes ,  Nathan S. Lewis ,  Derrick Chi

    发明人： Heather McCaig ,  Edward B. Myers ,  Michael L. Roukes ,  Nathan S. Lewis ,  Derrick Chi

    IPC分类号： G01N33/00

    CPC分类号： G01N33/0027 ,  G01N5/02 ,  G01N9/002

    摘要： Cantilever chemical vapor sensors that can be tailored to respond preferentially in frequency by controlling the location of deposition of an adsorbing layer. Cantilever chemical vapor sensor having a base, one or more legs and a tip are fabricated using a gold layer to promote deposition of a sorbing layer of a polymeric material in a desired location, and using a chromium layer to inhibit deposition of the sorbing layer in other locations. Sorbing layers having different glass temperatures Tg and their effects are described. The methods of making such cantilever chemical vapor sensors are described.

    摘要翻译： 悬臂式化学气相传感器可通过控制吸附层沉积的位置而定制成优先的频率响应。 使用金层制造具有基座，一个或多个腿部和尖端的悬臂式化学气相传感器，以促进将聚合物材料的吸附层沉积在期望的位置，并且使用铬层抑制吸附层的沉积 其他地点。 描述了具有不同玻璃温度Tg的吸附层及其效果。 描述制造这种悬臂式化学气相传感器的方法。