FLEXIBLE AMINE SENSOR BASED ON ULTRATHIN POLY-THIOPHENE THIN FILM TRANSISTOR
First Claim
1. A method, comprising:
- fabricating a substrate at room temperature; and
depositing an ultrathin film polymer on the substrate including creating a polymer thin film transducer amine sensor; and
sensing amine vapors with the polymer thin film transducer amine sensor.
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Abstract
The design and fabrication of ultrathin poly-3-hexyl thiophene (P3HT) film based amine sensors are described herein. Ultrathin P3HT monolayer films can be built on a patterned flexible n-octadecylphosphonic acid (ODPA)/Al2O3/PET substrate, forming a flexible polymer thin film transistor according to a solution process. The mechanism of the sensor is based on the interaction of amine molecules with the surface of the P3HT monolayer. The interaction of amine molecules with the surface of the P3HT monolayer can affect the current density of the PTFT, and the change in current density can indicate the presence of amine molecules in the surroundings. The amine sensors described herein can easily detect amine molecules in a parts per billion (ppb) range. The amine sensors can be utilized, for example, as disposable sensors within food packaging to ensure the safety of the packaged food.
8 Citations
21 Claims
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1. A method, comprising:
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fabricating a substrate at room temperature; and depositing an ultrathin film polymer on the substrate including creating a polymer thin film transducer amine sensor; and sensing amine vapors with the polymer thin film transducer amine sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 18, 19)
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13. A polymer thin film transducer amine sensor, comprising:
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a substrate; and a thin film of a polymer, wherein the polymer thin film transistor amine sensor has a sensitivity to amine vapors with a concentration on the order of parts per billion. - View Dependent Claims (14, 15, 16, 17)
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20. A method, comprising:
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embedding a poly-3-hexyl thiophene (P3HT)-based polymer thin film transistor amine sensor with a polymer film thickness between approximately 1 and approximately 60 nanometers within food packaging; sensing amine vapors within the food packaging with a sensitivity to the amine vapors with a concentration of less than 600 parts per billion; and indicating that food within the food packaging meets a condition as a function of the sensing of the amine vapors. - View Dependent Claims (21)
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Specification