Flexible amine sensor based on ultrathin poly-thiophene thin film transistor
First Claim
1. A method, comprising:
- fabricating a substrate; and
depositing a film of poly-3-hexyl thiophene (P3HT) on an octadecylphosphonic acid (ODPA) monolayer of the substrate to form a top layer of a gas sensor for sensing gas vapors.
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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.
5 Citations
21 Claims
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1. A method, comprising:
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fabricating a substrate; and depositing a film of poly-3-hexyl thiophene (P3HT) on an octadecylphosphonic acid (ODPA) monolayer of the substrate to form a top layer of a gas sensor for sensing gas vapors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A polymer thin film transistor amine sensor, comprising:
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a substrate; and a film of poly-3-hexyl thiophene (P3HT) that is formed on an octadecylphosphonic acid (ODPA) monolayer of the substrate and as a top layer of the polymer thin film transistor amine sensor, wherein the polymer thin film transistor amine sensor has a sensitivity to amine vapors with a particular concentration. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A system, comprising:
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means for fabricating a substrate; and means for depositing a film of poly-3-hexyl thiophene (P3HT) on an octadecylphosphonic acid (ODPA) monolayer of the substrate to form a top layer of a gas sensor for sensing gas vapors.
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Specification