Organic chemical sensor comprising plasma-deposited microporous layer, and method of making and using
Assignee3M Innovative Properties Company
InventorsMoses M. David, Stefan H. Gryska, Nelson B. O'Bryan, Neal A. Rakow, Michael S. Wendland
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Abstract
Applicant discloses a sensing element for sensing an organic chemical analyte, comprising a first electrode and a second electrode, and a microporous, hydrophobic, analyte-responsive dielectric material disposed at least in proximity to the first and second electrodes. The analyte-responsive dielectric material may be an amorphous random covalent network comprising a mean pore size of less than about 10 nm and a porosity of at least about 20%. An electrical property of the sensing element, such as capacitance, can be monitored in order to sense an organic chemical analyte.
Claims17
A sensor for sensing an organic chemical analyte, comprising:
- a sensing element that comprises a first electrode and a second electrode and a microporous, hydrophobic, analyte-responsive dielectric material disposed at least in proximity to the first and second electrodes, wherein the microporous, hydrophobic analyte-responsive dielectric material comprises an amorphous random covalent network comprising at least about 30% carbon, and having a mean pore size of less than about 10 nm and a porosity of at least about 20%, and that is a plasma-deposited network;
- and,
- an operating circuit in electrical communication with the first and second electrodes, wherein the operating circuit is capable of applying a voltage to the first and second electrodes and is capable of detecting a change in an electrical property of the sensing element.
A sensor for sensing an organic chemical analyte, comprising:
- a sensing element that comprises a first electrode and a second electrode and a microporous, hydrophobic, analyte-responsive dielectric material disposed at least in proximity to the first and second electrodes, wherein the microporous, hydrophobic analyte-responsive dielectric material comprises an amorphous random covalent network that comprises essentially 100% carbon, and having a mean pore size of less than about 10 nm and a porosity of at least about 20%;
- and,
- an operating circuit in electrical communication with the first and second electrodes, wherein the operating circuit is capable of applying a voltage to the first and second electrodes and is capable of detecting a change in an electrical property of the sensing element.
Dependencies are inferred from the claim text.