Nanotube sensor devices for DNA detection
First Claim
1. A nanotube sensor for sensing an polynucleotide, comprising:
- a substrate;
a first nanotube over the substrate;
at least one conducting element in electrical communication with the first nanotube; and
at least one single-strand DNA molecule operatively associated with the first nanotube, the at least one single-strand DNA molecule configured for interacting with a complimentary target DNA strand to alter an electrical property of the nanotube sensor.
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Abstract
A nanotube device is configured as an electronic sensor for a target DNA sequence. A film of nanotubes is deposited over electrodes on a substrate. A solution of single-strand DNA is prepared so as to be complementary to a target DNA sequence. The DNA solution is deposited over the electrodes, dried, and removed from the substrate except in a region between the electrodes. The resulting structure includes strands of the desired DNA sequence in direct contact with nanotubes between opposing electrodes, to form a sensor that is electrically responsive to the presence of target DNA strands. Alternative assay embodiments are described which employ linker groups to attach ssDNA probes to the nanotube sensor device.
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Citations
50 Claims
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1. A nanotube sensor for sensing an polynucleotide, comprising:
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a substrate;
a first nanotube over the substrate;
at least one conducting element in electrical communication with the first nanotube; and
at least one single-strand DNA molecule operatively associated with the first nanotube, the at least one single-strand DNA molecule configured for interacting with a complimentary target DNA strand to alter an electrical property of the nanotube sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for making a nanoelectronic sensor, comprising:
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disposing a film of nanotubes over electrodes on a substrate;
depositing a solution of single-stranded DNA over the substrate, wherein the single-stranded DNA is configured as a complement to a target DNA sequence; and
drying the solution to leave a deposit of the single-stranded DNA over the substrate. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A method for sensing a particular target polynucleotide sequence, comprising:
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exposing a solution to a nanoelectronic sensor, wherein the nanoelectronic sensor comprises a complementary polynucleotide for the target polynucleotide sequence attached to at least one nanotube in a region between conducting electrodes; and
observing at least one electrical property of the nanoelectronic sensor during the exposing step. - View Dependent Claims (26, 27, 28)
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29. An electronic sensor system for target polynucleotides, comprising:
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(a) at least one sensor platform having at least one electrical property, the platform including;
a substrate, at least one electrode disposed adjacent the substrate, and at least one nanostructured element disposed adjacent the substrate, the nanostructured element in electrical communication with the electrode;
(b) at least one detector probe operatively associated with the sensor platform, the probe including;
a linker group disposed in association with the sensor platform, the linker being connected to one or more of the following;
the nanostructured element, the substrate, and the electrode;
a detector biomolecule having a binding affinity to an analyte polynucleotide. a bonding connection between the linker group and the detector biomolecule; and
(c) electronic measurement circuitry connected to the electrode, and configured to measure the at least one electrical property of the sensor platform. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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Specification