Calorimetric microfluidic sensor
First Claim
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1. A microfluidic sensor, the microfluidic sensor comprising:
- a microchannel constructed of paper that comprises a reaction site that comprises a reagent and a sample inlet, wherein the microchannel is configured to receive a liquid substance comprising a chemical at the sample inlet that travels by capillary action to the reaction site;
a temperature sensor located proximal the reaction site of the microchannel and configured to measure a temperature as a result of a reaction between the reagent and the chemical in the liquid substance; and
a controller communicatively connected to the temperature sensor, the controller receives the temperature measured by the temperature sensor and derives a concentration of the chemical in the liquid substance from the temperature.
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Abstract
A microfluidic sensor includes a microchannel that includes a reaction site with a reagent and a sample inlet. A liquid substance is received at the sample inlet and travels by capillary action to the reaction site. A temperature sensor measures a temperature as a result of a reaction between the reagent and a chemical in the liquid substance. A controller is communicatively connected to the temperature sensor, receives the temperature measured by the temperature sensor, and derives a concentration of the chemical in the liquid substance from the temperature.
17 Citations
20 Claims
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1. A microfluidic sensor, the microfluidic sensor comprising:
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a microchannel constructed of paper that comprises a reaction site that comprises a reagent and a sample inlet, wherein the microchannel is configured to receive a liquid substance comprising a chemical at the sample inlet that travels by capillary action to the reaction site; a temperature sensor located proximal the reaction site of the microchannel and configured to measure a temperature as a result of a reaction between the reagent and the chemical in the liquid substance; and a controller communicatively connected to the temperature sensor, the controller receives the temperature measured by the temperature sensor and derives a concentration of the chemical in the liquid substance from the temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A microfluidic sensor system comprising:
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at least one microfluidic sensor, comprising; a microchannel constructed of paper that comprises a reaction site that comprises a reagent and a sample inlet, wherein the microchannel is configured to receive a liquid substance comprising a chemical at the sample inlet that travels by capillary action to the reaction site; and a temperature sensor located proximal the reaction site of the microchannel and configured to measure a temperature as a result of a reaction between the reagent and the chemical in the liquid substance; a controller communicatively connected to the at least one microfluidic sensor, the controller receives the temperature measured by the temperature sensor of at least one microfluidic sensor and derives a concentration of the chemical in the liquid substance from the temperature; and a graphical display operated by the controller to present the derived concentration of the chemical in the liquid substance. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A microfluidic sensor, the microfluidic sensor comprising:
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a microchannel that comprises a reaction site on a first finger, the reaction site comprises a reagent, a sample inlet, and a second finger wherein the microchannel is configured to receive a liquid substance comprising a chemical at the sample inlet that travels by capillary action to the reaction site; a first temperature sensor located proximal to the reaction site on the first finger of the microchannel and configured to measure a first temperature as a result of a reaction between the reagent and the chemical in the liquid substance; a second temperature sensor located proximal to the second finger of the microchannel and configured to measure a second temperature; and a controller communicatively connected to the first temperature sensor and the second temperature sensor, the controller receives the first temperature and the second temperature and the controller derives a concentration of the chemical in the liquid substance from a differential between the first temperature and the second temperature. - View Dependent Claims (18, 19, 20)
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Specification