Chemistry: analytical and immunological testing – Measurement of electrical or magnetic property or thermal... – By means of a solid body in contact with a fluid
Patent
1996-04-16
1999-11-16
Alexander, Lyle A.
Chemistry: analytical and immunological testing
Measurement of electrical or magnetic property or thermal...
By means of a solid body in contact with a fluid
204431, 73 232, 73 2503, 7333505, G01N 2704
Patent
active
059856734
ABSTRACT:
A method and apparatus for rapidly and continuously restoring the sensing capacity of thin film sensing elements includes passing a sufficient electrical current through the sensing element to remove from the element selected components from a fluid sample in contact with the sensing element that have an affinity for and are adsorbed and accumulated onto the surface of the sensing element. The passing of current through the sensing element can be accomplished either by applying a constant voltage across the sensing element or by forcing a constant current through the sensing element. The restoration technique removes the components from the sensing element by a combination of resistive heating of the element and electron bombardment of the components on the surface of the element. Moreover, to prevent possible rupture of the sensing element due to electromigration, the current may be alternated in a first direction and then in a second and opposite direction through the sensing element in sequential runs of equal predetermined time intervals.
REFERENCES:
patent: 3124771 (1964-03-01), Rohrback
patent: 3578409 (1971-05-01), Silverman
patent: 3714562 (1973-01-01), McNerney
patent: 3888110 (1975-06-01), Clark
patent: 3961842 (1976-06-01), Jasinski
patent: 3973192 (1976-08-01), Justi et al.
patent: 4059406 (1977-11-01), Fleet
patent: 4196427 (1980-04-01), Rudberg
patent: 4224280 (1980-09-01), Takahama et al.
patent: 4313338 (1982-02-01), Abe
patent: 4338281 (1982-07-01), Treitinger
patent: 4343768 (1982-08-01), Kimura
patent: 4358951 (1982-11-01), Chang
patent: 4362765 (1982-12-01), Abe
patent: 4387165 (1983-06-01), Youngblood
patent: 4432224 (1984-02-01), Typpo
patent: 4453151 (1984-06-01), Leary et al.
patent: 4525266 (1985-06-01), Schmidt et al.
patent: 4541904 (1985-09-01), Luder
patent: 4542640 (1985-09-01), Clifford
patent: 4565786 (1986-01-01), Dunkhase
patent: 4580439 (1986-04-01), Manaka
patent: 4587104 (1986-05-01), Yannopoulos
patent: 4592967 (1986-06-01), Komatsu et al.
patent: 4706493 (1987-11-01), Chang
patent: 4724008 (1988-02-01), Bell
patent: 4830713 (1989-05-01), Gagescu
patent: 4839767 (1989-06-01), Yoshioka et al.
patent: 4911892 (1990-03-01), Grace
patent: 4928513 (1990-05-01), Sugihara
patent: 4938928 (1990-07-01), Koda et al.
patent: 4953387 (1990-09-01), Johnson
patent: 4992244 (1991-02-01), Grate
patent: 5010021 (1991-04-01), Bell et al.
patent: 5042288 (1991-08-01), Vig
patent: 5087574 (1992-02-01), Bell et al.
patent: 5090232 (1992-02-01), Wakabayashi
patent: 5145645 (1992-09-01), Zakin et al.
patent: 5201229 (1993-04-01), Ibe
patent: 5208162 (1993-05-01), Osborne et al.
patent: 5238729 (1993-08-01), Debe
patent: 5243238 (1993-09-01), Kean
patent: 5334351 (1994-08-01), Heinze et al.
patent: 5356458 (1994-10-01), Javadi et al.
patent: 5466605 (1995-11-01), Glaunsinger et al.
patent: 5470756 (1995-11-01), Coles et al.
patent: 5521099 (1996-05-01), Glaunsinger et al.
patent: 5635136 (1997-06-01), Gluansinger et al.
M. A. George et al., "D-Electrical, Spectroscopic, and Morphological Investigation of Chromium Diffusion Through Gold Films," Arizona State University (academic paper), No Date.
George et al., "The Electrical and Structural Properties of Gold Films and Mercury Covered Gold Films." Thin Sol. Films, vol. 245, pp. 215-224 (1994).
G. W. Sheets,, "A Multi-Temperature Gas Sensor Fabricated Utilizing Micro-Machining and Integrated Circuit Processing Techniques," Arizona State University (Dissertation 1993).
Cranny et al., "An Investigation into the Viability of Screen Printed Organic Semiconductor Compounds as Gas Sensors," Inst. Phys. Conf. Ser. No. 111: Int. Conf. on New Materials and Their Applications, pp. 345-354 (1990).
M. A. George et al., "Electrical, Spectroscopic, and Morphological Investigation of Chromium Diffusion Through Gold Films," Thin Solid Films, vol. 189, pp. 59-72 (1990).
M. A. George et al., "Thermally induced changes in the resistance, microstructure, and adhesion of thin gold films on Si/SiO.sub.2 substrates," J. Vac. Sci. Technol. A., vol. 8 No. 3, pp. 1491-1497 (May/Jun., 1990).
J. Janata, Principles of Chemical Sensors, Ch. 4, pp. 218-221 (1989).
Kayser et al., "Sensing Devices for Sodium Vapvr Detection, 9 Sensors and Actuators" 323-331 (1986).
J. J. McNerney et al., "Gold Film Technology," Sensors, vol. 3 pp. 39, 40, 42 (Feb. 1986).
J. J. McNerney et al., "Mercury Detection by Means of Thin Gold Films," Science, vol. 178, pp. 611-612 (Nov., 1972).
Bao Qingcheng
Glaunsinger William
Sorensen Ian
Alexander Lyle A.
Arizona Baord of Regents
LandOfFree
Method for regeneration of a sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for regeneration of a sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for regeneration of a sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1323743