Sensors for gas dosimetry
First Claim
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1. A gas dosimeter, comprising:
- a housing configured with an opening to admit an analyte; and
a multivariate sensor disposed in the housing, wherein the sensor is configured to determine a concentration of the analyte over time, the multivariate sensor comprising an irreversible sensing material, wherein electrical properties of the irreversible sensing material are configured to change irreversibly upon exposure to the analyte, wherein the irreversible sensing material comprises an inactive matrix and an active additive, wherein the active additive comprises an active polymer and a dopant, wherein the dopant is configured to react with the analyte and form a reaction product upon exposure to the analyte, and wherein the reaction product is configured to react with the active polymer to irreversibly change the electrical properties of the irreversible sensing material.
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Abstract
Methods and sensors for selective fluid sensing are provided. A gas dosimeter includes a housing configured with an opening to admit an analyte. The gas dosimeter also includes a multivariate sensor disposed in the housing. The sensor is configured to determine a concentration of the analyte over time. In addition, the multivariate sensor includes an irreversible sensing material. Electrical properties of the irreversible sensing material are configured to change irreversibly upon exposure to the analyte.
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Citations
21 Claims
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1. A gas dosimeter, comprising:
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a housing configured with an opening to admit an analyte; and a multivariate sensor disposed in the housing, wherein the sensor is configured to determine a concentration of the analyte over time, the multivariate sensor comprising an irreversible sensing material, wherein electrical properties of the irreversible sensing material are configured to change irreversibly upon exposure to the analyte, wherein the irreversible sensing material comprises an inactive matrix and an active additive, wherein the active additive comprises an active polymer and a dopant, wherein the dopant is configured to react with the analyte and form a reaction product upon exposure to the analyte, and wherein the reaction product is configured to react with the active polymer to irreversibly change the electrical properties of the irreversible sensing material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A multivariate sensor, comprising:
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an irreversible sensing material, comprising; a first matrix configured to provide a first output indicative of the concentration of an analyte over time; and a second matrix configured to provide a second output to correct for environmental interference effects, wherein electrical properties of the irreversible sensing material are configured to change irreversibly upon exposure to the analyte; and wherein the first matrix comprises a first inactive matrix and a first active additive, wherein the first active additive comprises a first active polymer and a first dopant, wherein the first dopant is configured to react with an analyte and form a reaction product upon exposure to the analyte, and wherein the reaction product is configured to react with the first active polymer to irreversibly change the electrical properties of the irreversible sensing material. - View Dependent Claims (11, 12, 13, 14)
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15. A multivariate dosimeter sensor, comprising:
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at least two transducers configured to generate at least two signals; an irreversible sensing material disposed on the at least two transducers, wherein the irreversible sensing material comprises an inactive matrix and an active additive, wherein the active additive comprises an active polymer and a dopant, wherein the dopant is configured to react with an analyte and form a reaction product upon exposure to the analyte, and wherein the reaction product is configured to react with the active polymer to irreversibly change electrical properties of the irreversible sensing material; and an RFID device comprising an integrated circuit chip configured to receive the at least two signals. - View Dependent Claims (16, 17, 18)
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19. A multivariate dosimeter sensor node, comprising:
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a first transducer configured to generate a first signal; a second transducer configured to generate a second signal; an irreversible sensing material disposed on both the first transducer and the second transducer, wherein the irreversible sensing material comprises an inactive matrix and an active additive, wherein the active additive comprises an active polymer and a dopant, wherein the dopant is configured to react with an analyte and form a reaction product upon exposure to the analyte, and wherein the reaction product is configured to react with the active polymer to irreversibly change electrical properties of the irreversible sensing material; and an RFID device comprising an integrated circuit chip configured to receive the first and second signals. - View Dependent Claims (20, 21)
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Specification