Active solid-state devices (e.g. – transistors – solid-state diode – Responsive to non-electrical signal
Reexamination Certificate
2005-02-01
2005-02-01
Ho, Hoai (Department: 2818)
Active solid-state devices (e.g., transistors, solid-state diode
Responsive to non-electrical signal
C257S014000, C257S200000, C438S048000, C438S049000
Reexamination Certificate
active
06849911
ABSTRACT:
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 H2concentration 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.
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Monty Greg
Ng Kwok
Yang Mohshi
Ho Hoai
Huynh Andy
Mickelson Edward T.
Nano-Proprietary, Inc.
Winstead Sechrest & Minick P.C.
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