PALLADIUM-SILVER ALLOY NANOWIRES AND NANOPARTICLE COLUMNS FOR USE AS VARIABLE-RANGE HYDROGEN SENSORS
    7.
    发明授权
    PALLADIUM-SILVER ALLOY NANOWIRES AND NANOPARTICLE COLUMNS FOR USE AS VARIABLE-RANGE HYDROGEN SENSORS 有权
    纳米线和钯银合金纳米微粒支柱用作具有变量区域的氢气传感器

    公开(公告)号:EP1552272B1

    公开(公告)日:2011-01-05

    申请号:EP03791939.6

    申请日:2003-08-29

    IPC分类号: G01N7/00 G01N33/497

    CPC分类号: G01N27/127 G01N33/005

    摘要: The present invention provides for variable-range hydrogen sensors (502) and methods for making same. Such variable-range hydrogen sensors (502) comprise a series of fabricated Pd-Ag (palladium-silver) nanowires (106, 301) - each wire of the series having a different Ag to Pd ratio-with nanobreakjunctions (302) in them and wherein the nanowires (106, 301) have predefined dimensions and orientation. When the nanowires (106, 301) 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 (302) 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.