Sensitivity control for nanotube sensors
First Claim
1. A nanostructure sensing device for detecting an analyte, comprising:
- a substrate;
a first nanostructure disposed over the substrate;
a first conductive element disposed over the substrate and forming a first electrical junction with a first nanostructure;
a second conductive element disposed over the substrate and forming a second electrical junction with the first nanostructure;
contact regions adjacent to junctions of the conductive elements and the first nanostructure; and
inhibiting material on at least the contact regions.
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Accused Products
Abstract
Nanostructure sensing devices for detecting an analyte are described. The devices include nanostructures connected to conductive elements, all on a substrate. Contact regions adjacent to points of contact between the nanostructures and the conductive elements are given special treatment. The proportion of nanostructure surface area within contact regions can be maximized to effect sensing at very low analyte concentrations. The contact regions can be passivated in an effort to prevent interaction between the environment and the contact regions for sensing at higher analyte concentrations and for reducing cross-sensing. Both contact regions and at least some portion of the nanostructures can be covered with a material that is at least partially permeable to the analyte of interest and impermeable to some other species to tune selectivity and sensitivity of the nanostructure sensing device.
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Citations
39 Claims
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1. A nanostructure sensing device for detecting an analyte, comprising:
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a substrate;
a first nanostructure disposed over the substrate;
a first conductive element disposed over the substrate and forming a first electrical junction with a first nanostructure;
a second conductive element disposed over the substrate and forming a second electrical junction with the first nanostructure;
contact regions adjacent to junctions of the conductive elements and the first nanostructure; and
inhibiting material on at least the contact regions. - 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, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A nanostructure sensing device for detecting at least one analyte, comprising:
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a substrate;
a first nanostructure disposed over the substrate;
a first conductive element disposed over the substrate and forming an electrical junction with the first nanostructure;
a second conductive element disposed over the substrate and forming an electrical junction with the first nanostructure;
a first metal node in contact with the first nanostructure; and
contact regions adjacent to junctions of the conductive elements and the first nanostructure and adjacent to contacts between the first metal node and the first nanostructure. - View Dependent Claims (35, 36, 37)
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38. An electronic nanostructure device, comprising:
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a substrate;
a first nanostructure disposed over the substrate;
a first conductive element disposed over the substrate and forming a first electrical junction with a first nanostructure;
a second conductive element disposed over the substrate and forming a second electrical junction with the first nanostructure;
contact regions adjacent to junctions of the conductive elements and the first nanostructure;
passivation material on the contact regions; and
a portion of the first nanostructure substantially free of passivation material. - View Dependent Claims (39)
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Specification