Measuring and testing – Gas analysis
Reexamination Certificate
2007-07-03
2007-07-03
Williams, Hezron (Department: 2856)
Measuring and testing
Gas analysis
C438S048000
Reexamination Certificate
active
11063119
ABSTRACT:
The present invention provides for novel hydrogen sensors and methods for making same. In some embodiments, such novel hydrogen sensors are continuous-range hydrogen sensors comprising Pd—Ag nanoparticles arrayed as nanowires or two-dimensional shapes on a resistive surface. Such continuous-range hydrogen sensors are capable of measuring a wide range of hydrogen gas concentration over a wide temperature range. Unlike existing hydrogen sensors that experience a large change in resistance at a certain hydrogen concentration, the continuous-range hydrogen sensor of the present invention changes resistance continuously over a broad range of hydrogen concentration. This continuous change varies slowly with hydrogen concentration and is predictable such that the continuous-range hydrogen sensor can be used to measure hydrogen concentration continuously from a few ppm to 40,000 ppm level or higher over a broad range of temperatures (e.g., −40° C. to +150° C.).
REFERENCES:
patent: 4240879 (1980-12-01), Dobson
patent: 5670115 (1997-09-01), Cheng et al.
patent: 5886614 (1999-03-01), Cheng et al.
patent: 6103540 (2000-08-01), Russell et al.
patent: 6120835 (2000-09-01), Perdieu
patent: 6359288 (2002-03-01), Ying et al.
patent: 6465132 (2002-10-01), Jin
patent: 6525461 (2003-02-01), Iwasaki et al.
patent: 6535658 (2003-03-01), Mendoza et al.
patent: 6673644 (2004-01-01), Gole et al.
patent: 6737286 (2004-05-01), Tao et al.
patent: 6770353 (2004-08-01), Mardilovich et al.
patent: 6788453 (2004-09-01), Banin et al.
patent: 6849911 (2005-02-01), Monty et al.
patent: 6882051 (2005-04-01), Majumdar et al.
patent: 7104111 (2006-09-01), Monty et al.
patent: 2002/0079999 (2002-06-01), Abdel-Tawab et al.
patent: 2002/0132361 (2002-09-01), Vossmeyer et al.
patent: 2003/0079999 (2003-05-01), Penner et al.
patent: 2003/0135971 (2003-07-01), Liberman et al.
patent: 2003/0139003 (2003-07-01), Gole et al.
patent: 2003/0189202 (2003-10-01), Li et al.
patent: 2004/0023428 (2004-02-01), Gole et al.
patent: 2004/0067646 (2004-04-01), Tao et al.
patent: 2004/0070006 (2004-04-01), Monty et al.
patent: 2004/0072213 (2004-04-01), Besnard et al.
patent: 2004/0104129 (2004-06-01), Gu et al.
patent: 2004/0106203 (2004-06-01), Stasiak et al.
patent: 2004/0118698 (2004-06-01), Lu et al.
patent: 2005/0005675 (2005-01-01), Monty et al.
E.C. Walter et al., “Sensors from Electrodeposited Metal Nanowires,”Surface and Interface Analysis, 2002; 34: 409-412.
Frederic Favier et al., “Hydrogen Sensors and Switches from Electrodeposited Palladium Mesowire Arrays,”Science, vol. 293, Sep. 21, 2001, pp. 2227-2234.
H.D. Tong et al., “A Hydrogen Separation Module Based on Wafer-Scale Micromachined Palladium-Silver Alloy Membranes,”IEEE, Transducers '03 The 12thInternational Conference on Solid State Sensors, Actuators and Microsystems, Boston, Jun. 8-12, 2003, pp. 1742-1745.
Minhee Yun et al., “Nanowire Growth for Sensor Arrays,” to appear inNanofabrication Technologies, Ed. E. A. Dobisz, SPIE Proceedings 5220, 2003, pp. 1-9.
J. N. Keuler et al., “Characterization of Electroless Plated Palladium-Silver Alloy Membranes,”Thin Solid Films, 1999, pp. 91-98.
V. Jayaraman et al., “Synthesis and Hydrogen Permeation Properties of Ultrathin Palladium-Silver Alloy Membranes,”Journal of Membrane Science, 1995, pp. 251-262.
F.A. Lewis, “A Comparison of the Properties of Palladium with Those of Other Transition Elements,” The University of Texas Library, Academic Press 1967, pp. 1-31, 48, 50, -51, 56-57, 70-71, 74-79, 82-83,86-87, 90-93, 112-113, 140-141, 144-142, and 160.
Suleiman et al., “The effect of the cluster structure in the phase transition during hydrogen absorption”, Annual Reports of Deutsches Elektronen-Synchroton (DESY) (2002).
Suleiman et al., “Pd-H Clusters: non-bulk like behavior”, Annual Reports of Deutsches Elektronen-Synchroton (DESY) (2003).
Oh et al., “H NMR Study of Hydrogen in Palladium Nanocrystals”, J. Korean Phys. Soc., 43(6) (Dec. 2003), pp. L958-962.
Finh Richard
Monty Greg
Ng Kwok
Yang Mohshi
Fish & Richardson P.C.
Frank Rodney
Kordzik Kelly
Nano-Proprietary, Inc.
Williams Hezron
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