CA1219632A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Amorphous metal oxide electrodes
Assignee: University Patents Inc
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Filing: 1983-10-27
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Granted: 1987-03-24
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Expires: 2003-10-27
Abstract
Abstract ABSTRACT OF THE DISCLOSURE Electrodes sensitive to the activity of ionic species are disclosed comprising an amorphous oxide of a metal from either of the platinum or rhenium groups of metals. In accordance with a preferred embodiment of the invention, an electrically free standing electrode is provided. In accordance with another embodiment, an ion sensitive field effect transistor employing as the electrochemically active species an amorphous oxide of a metal from either of the platinum or rhenium groups of metals is disclosed. Amorphous iridium oxide, especially sputtered iridium oxide, is preferred for use in connection with certain embodiments of the invention. The foregoing electrode materials demonstrate good electrochemical stability, Nernstian response, excellent physical resiliency and corrosion resistant, low impedance and facility for microlithographic fabrication. Measuring the electrochemical potential generated by contacting the electrodes of this invention with the ionic species to which they are sensitive with potential measurement means provides a measurement of the activity of said species.
Inventors
- 👤 Imants Lauks
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-08 15:20
CPC Classifications
—
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
62 words
An article for the measurement of activity of an ionic species comprising: an electrode sensitive to said activity comprising an amorphous oxide of a metal from either of the platinum or rhenium groups of metals, said electrode developing an electrical potential upon contact with said species, and means for the measurement of said electrical potential in electrical contact with said amorphous oxide.
Claim 2
Dependent Claim
62 words
An article for the measurement of activity of an ionic species comprising: an electrode sensitive to said activity comprising an amorphous oxide of a metal from either of the platinum or rhenium groups of metals, said electrode developing an electrical potential upon contact with said species, and means for the measurement of said electrical potential in electrical contact with said amorphous oxide.
Claim 3
Dependent Claim
12 words
The article of claim 1 wherein said electrode comprises amorphous iridium oxide.
Claim 4
Dependent Claim
12 words
The article of claim 1 wherein said electrode comprises sputtered iridium oxide.
Claim 5
Dependent Claim
10 words
The article of claim 1 sensitive to hydrogen ion concentration.
Claim 6
Dependent Claim
17 words
The article of claim 1 further comprising barrier means on said electrode permeable to said ionic species.
Claim 7
Dependent Claim
11 words
The article of claim 5 wherein said barrier means comprises glass.
Claim 8
Dependent Claim
17 words
The article of claim 1 further comprising nonconducting structural support means in contact with said amorphous oxide.
Claim 9
Dependent Claim
75 words
An article for the measurement of activity of an ionic species comprising: an electrically conductive underpayment, a sensing layer on and in electrical contact with said underlayment sensitive to said activity comprising an amorphous oxide of a metal from either of the platinum or rhenium groups of metals, said sensing layer developing an electrical potential upon contact with said species, and means for the measurement of said electrical potential in electrical contact with said underlayment.
Claim 10
Dependent Claim
75 words
An article for the measurement of activity of an ionic species comprising: an electrically conductive underpayment, a sensing layer on and in electrical contact with said underlayment sensitive to said activity comprising an amorphous oxide of a metal from either of the platinum or rhenium groups of metals, said sensing layer developing an electrical potential upon contact with said species, and means for the measurement of said electrical potential in electrical contact with said underlayment.
Claim 11
Dependent Claim
13 words
The article of claim 8 wherein said sensing layer comprises amorphous iridium oxide.
Claim 12
Dependent Claim
13 words
The article of claim 8 wherein said sensing layer comprises sputtered iridium oxide.
Claim 13
Dependent Claim
12 words
The article of claim 8 wherein said measurement determines hydrogen ion concentration.
Claim 14
Dependent Claim
23 words
The article of claim 8 further comprising a barrier layer on said sensing layer said barrier layer being permeable to said ionic species.
Claim 15
Dependent Claim
11 words
The article of claim 12 wherein said barrier layer comprises glass.
Claim 16
Dependent Claim
10 words
The article of claim 8 wherein said underlayment comprises metal.
Claim 17
Dependent Claim
28 words
An ion sensitive field effect transistor having a gate, said gate comprising an amorphous oxide of a metal from either of the platinum or rhenium groups of metals.
Claim 18
Dependent Claim
28 words
An ion sensitive field effect transistor having a gate, said gate comprising an amorphous oxide of a metal from either of the platinum or rhenium groups of metals.
Claim 19
Dependent Claim
12 words
The transistor of claim 15 wherein said gate comprises amorphous iridium oxide.
Claim 20
Dependent Claim
12 words
The transistor of claim 15 wherein said gate comprises sputtered iridium oxide.
Claim 21
Dependent Claim
24 words
The transistor of claim 15 having a drain current respond size to activity of an ionic species in contact with said amorphous metal oxide.
Claim 22
Dependent Claim
12 words
The transistor of claim 18 wherein said current is responsive to pH.
Claim 23
Dependent Claim
22 words
The transistor of claim 15 further comprising a barrier layer on said gate, said barrier layer being permeable to said ionic species.
Claim 24
Dependent Claim
11 words
The transistor of claim 20 wherein said barrier layer comprises glass.
Claim 25
Dependent Claim
32 words
A method for measuring the activity of an ionic species comprising contacting said species with an article according to claim 1, and measuring electrical potential between said electrode and said ionic species.
Claim 26
Dependent Claim
12 words
The method of claim 22 wherein said measurement deter-mines hydrogen ion concentration.
Claim 27
Dependent Claim
13 words
The method of claim 22 wherein said amorphous metal oxide comprises iridium oxide.
Claim 28
Dependent Claim
14 words
The method of claim 22 wherein said amorphous metal oxide comprises sputtered iridium oxide.
Claim 29
Dependent Claim
17 words
The method of claim 22 wherein said contacting is through a barrier layer permeable to said species.
Claim 30
Dependent Claim
12 words
The method of claim 26 wherein said barrier layer comprises a glass.
Claim 31
Dependent Claim
23 words
An electrically free standing ion sensitive electrode comprising an amorphous oxide of a metal from either the platinum or rhenium groups of metals.
Claim 32
Dependent Claim
23 words
An electrically free standing ion sensitive electrode comprising an amorphous oxide of a metal from either the platinum or rhenium groups of metals.
Claim 33
Dependent Claim
11 words
The free standing electrode of claim 28 comprising sputtered iridium oxide.
References Cited (Backward Citations)
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