摘要:
A method is provided for forming a thin film conducting polymer (24) for sensor applications. The method comprises forming at least one pair of electrodes (14, 16) on a substrate (12), the pair of electrodes (14, 16) having an insulating layer (18) positioned therebetween, the insulating layer (18) having a surface (20) opposed to the substrate (12), increasing OH− groups on the surface (20), binding silane molecules (22) to the surface (20), and forming the conducting polymer material (24) on the silane molecules (22) between and in electrical contact with the electrodes (14, 16).
摘要:
A carbon nanotube sensor (30), for determining the degree of the presence of an unwanted environmental agent, includes a plurality of carbon nanotubes (18). The sensor (30) comprises first and second conducting layers (32, 34) having alternatively interdigitated fingers (36, 38). The plurality of carbon nanotubes (18) having a material characteristic are coupled between each of the interdigitated fingers (36, 38). Optionally, a gate may be used for biasing the device for specific sensor applications by adjusting the electrical resistance.
摘要:
A method is provided for selectively placing catalytic nanoparticles (22) for growing one dimensional structures (28) including nanotubes and nanowires. The method comprises providing a solution (23) including a plurality of catalytic nanoparticles (28) suspended therein. An alternating current is applied between two electrodes (12, 14) submersed in the solution (23), thereby positioning the plurality of catalytic nanoparticles (22) contiguous to the two electrodes (12, 14). A one dimensional nanostructure (28) is then grown from each of the catalytic nanoparticles (22).
摘要:
An apparatus (50) and method is provided for growing a network of common diameter nanotubes (24). The apparatus comprises chemically functionalizing a portion (16) of a substrate (12); anchoring catalyst nanoparticles (22), each having substantially the same diameter, on the portion (16) of the substrate (12); and growing overlapping carbon nanotubes (24), each having substantially the same diameter, on the catalyst nanoparticles (22).
摘要:
A device is provided for determining the degree of the presence of an unwanted environmental agent. The apparatus comprises a device (30, 40) having first (31, 41) and second (33, 46) conducting layers with alternatively interdigitized fingers (34, 36, 42, 43, 44, 47, 48, 49) coupled to a nano-structure (32, 45) having a high aspect ratio, wherein sections (35, 37, 50, 51, 52, 53, 54) of the nano-structure between each of the fingers are substantially equal in length. Circuitry (62) coupled to the first and second conducting layers determines the occurrence of a change in a material characteristic of the sections of the nano-structure.