Flexible bioelectronic photodetector and imaging arrays based on bacteriorhodopsin (BR) thin films
First Claim
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1. Flexible photodetector array, comprising of:
- a first flexible polymer sheet coated with a continuous electrically conducting film forming one of an anode and a cathode electrode, a second flexible polymer sheet having a patterned coating of a electrically conducting film forming the other electrode, the patterned coating corresponding to a desired pattern of pixels, at least one of the first flexible polymer sheet coated with a continuous, electrically conducting film and the second flexible polymer sheet having a patterned coating of a electrically conducting film being substantially transparent;
a thin film containing one or more layers of oriented purple membrane patches containing bacteriorhodopsin (bR), or an analog thereof, sandwiched between the first and second flexible polymer sheets with the electrically conducting film physically contacting one side of the thin film and the patterned coating of an electrically conducting film contacting an opposed side of the thin film to form a pixel array of sensing elements; and
the continuous, electrically conducting film and the patterned coating of an electrically conducting film being electrically connected to a signal processing circuit.
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Abstract
The direct deposit of photoelectric materials onto low-cost prefabricated patterned flexible electrodes provided by the present invention introduces a new design approach that permits the development of innovative lightweight, durable and non-planar sensing systems. By extending single and multi-spectral bioelectronic sensing technology to flexible plastic substrates, the invention offers a number of potential advantages over structurally rigid silicon-based microelectronics (e.g. CMOS) including a reduction in spatial requirements, weight, electrical power consumption, heat loss, system complexity, and fabrication cost.
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Citations
39 Claims
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1. Flexible photodetector array, comprising of:
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a first flexible polymer sheet coated with a continuous electrically conducting film forming one of an anode and a cathode electrode, a second flexible polymer sheet having a patterned coating of a electrically conducting film forming the other electrode, the patterned coating corresponding to a desired pattern of pixels, at least one of the first flexible polymer sheet coated with a continuous, electrically conducting film and the second flexible polymer sheet having a patterned coating of a electrically conducting film being substantially transparent; a thin film containing one or more layers of oriented purple membrane patches containing bacteriorhodopsin (bR), or an analog thereof, sandwiched between the first and second flexible polymer sheets with the electrically conducting film physically contacting one side of the thin film and the patterned coating of an electrically conducting film contacting an opposed side of the thin film to form a pixel array of sensing elements; and the continuous, electrically conducting film and the patterned coating of an electrically conducting film being electrically connected to a signal processing circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of fabricating a flexible photodetector array, comprising the steps of:
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a) coating a first flexible polymer sheet with a continuous electrically conducting film; b) coating a second flexible polymer sheet with a patterned coating of an electrically conducting film, the patterned coating corresponding to a desired pattern of sensing elements, at least one of the first flexible polymer sheet coated with a continuous, electrically conducting film and the second flexible polymer sheet having a patterned coating of a electrically conducting film being substantially transparent; c) orienting the purple membrane patches containing (bR), or an analog thereof, and forming a film containing one or more layers of oriented purple patches and immobilizing the film onto the flexible polymer sheet coated with the patterned electrically conducting film; and d) affixing the film containing one or more layers of oriented purple membrane patches between the first and second flexible polymer sheets, with the electrically conducting film physically contacting one side of the film and the patterned coating of an electrically conducting film contacting an opposed side of the film to form an array of sensing elements and sealing peripheral edges of the first and second flexible polymer sheets. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification