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    • 7. 发明申请
    • FORMATION OF METAL NANOWIRES FOR USE AS VARIABLE-RANGE HYDROGEN SENSORS
    • 形成用作可变范围的氢传感器的金属纳米颗粒
    • US20080078234A1
    • 2008-04-03
    • US11486558
    • 2006-07-14
    • Greg MontyKwok NgMohshi Yang
    • Greg MontyKwok NgMohshi Yang
    • G01N27/00B82B3/00
    • G01N27/127G01N33/005
    • The present invention provides for variable-range hydrogen sensors and methods for making same. Such variable-range hydrogen sensors comprise a series of fabricated Pd—Ag (palladium-silver) nanowires—each wire of the series having a different Ag to Pd ratio—with nanobreakjunctions in them and wherein the nanowires have predefined dimensions and orientation. When the nanowires are exposed to H2, their lattace swells when the H2 concentration reaches a threshold value (unique to that particular ratio of Pd to Ag). This causes the nanobreakjunctions to close leading to a 6-8 orders of magnitude decrease in the resistance along the length of the wire and providing a sensing mechanism for a range of hydrogen concentrations.
    • 本发明提供可变范围氢传感器及其制造方法。 这种可变范围氢传感器包括一系列制备的Pd-Ag(钯 - 银)纳米线 - 该系列中的每根线具有不同的Ag与Pd的比例,并且其中纳米区域结合在一起,并且其中纳米线具有预定义的尺寸和取向。 当纳米线暴露于H 2 O 2时,当H 2 O 2浓度达到阈值(对于特定的Pd与Ag的比率是唯一的)时,它们的晶格膨胀。 这导致纳米划痕结合,导致沿导线长度的电阻降低6-8个数量级,并为一定范围的氢浓度提供感测机制。