Abstract:
A nanotube-based flexible field effect transistor and its method of manufacture is provided. The field effect transistor according to the invention comprises at least two contact electrodes, respectively drain and source electrodes, an electrical conduction zone connected to the contact electrodes, said zone comprising a plurality of single-wall carbon nanotubes that are substantially aligned, a gate electrode for controlling the electric current circulating in said zone and a flexible substrate on which the contact and gate electrodes are deposited. The nanotube density in the conduction zone is strictly greater than 10 nanotubes per micrometer.
Abstract:
The invention relates to an integrated device (PM) for characterising electric or electronic components (DUT), in particular nanometric ones, comprising a substantially insulating substrate (S) on which are provided four conducting pads (P1, P2, P3, P4), at least three resistive pads (R1, R3, R4) connecting said pads together, and a transmission line (CPW) including a signal conductor (Cc) and at least one ground conductor (CL1, CL2), wherein: said resistive pads are arranged so as to connect a first conducting pad to a second and a fourth conducting pad, and to connect said fourth conducting pad to a third conducting pad; the signal conductor of the transmission line is connected to the first conducting pad; and the ground conductor of the transmission line is connected to the third pad.
Abstract:
The present invention concerns a method for modyfing at least an electronic property of a carbon nanotube or nanowire comprising exposing said nanotube or nanowire to an acid having the formula (I) wherein R1, R2 and R3 are chosen in the group comprising (H, F, Cl, Br, I) with at least one of R1, R2 and R3 being different from H. At least part of the nanotube or nanowire may be a channel region of a field effect transistor.
Abstract:
Monoatomic and monocrystalline layer of large size, in diamond type carbon, and method for the manufacture of this layer.According to the invention, a monocrystalline substrate (2) is formed in SiC terminated by an atomic plane of carbon according to a reconstruction c(2×2) and at least one annealing is carried out, capable of transforming this atomic plane, which is a plane of dimers C≡C (4) of sp configuration, into a plane of dimers C—C (8) of sp3 configuration. Application to microelectronics, optics, optoelectronics, micromechanics and biomaterials.
Abstract:
The invention concerns a device for detecting and storing electromagnetic beams, an imager incorporating same, a method for making said device and use thereof. The inventive device comprises a field-effect phototransistor including: two source and drain contact electrodes, an electrical conduction unit which is connected to the two contact electrodes and which is coated with a photosensitive polymeric coating capable of absorbing the beams, of detecting, of generating in response the loads detected by said unit and of storing said loads, and a gate electrode which is capable of controlling the electric current in the unit as well as spatially distributing the loads in said coating and which is separated from said unit by a gate dielectric. Said device is configured such that the conduction unit comprises at least one semiconductive nanotube or nanowire capable of supplying an electric signal representing a modification of the conductivity of the phototransistor having been exposed to a beam, and that the gate dielectric has a thickness and a permittivity ∈, which satisfy ∈r>0.2 nm*1, so that the conductivity after exposition may be electrically reset in a reduced time and that the device forms at least one imaging pixel.
Abstract:
The invention relates to a semiconductor device comprising at least two electrodes and at least one nanotube or nanowire, in particular a carbon nanotube or nanowire, the device including at least one semiconductive nanotube or nanowire having at least one region that is covered at least in part by at least one layer of molecules or nanocrystals of at least one photosensitive material, an electrical connection between said two electrodes being made by at least one nanotube, namely said semiconductive nanotube or nanowire and optionally by at least one other nanotube or nanowire.
Abstract:
A process treats a surface of a semiconductor material in order to put the surface into a predetermined electrical state. The semiconductor material is preferably monocrystalline. The process includes (a) preparing the surface of the semiconductor material such that the surface has a controlled organization at an atomic scale such that the surface is capable of combining with a chosen material, and (b) combining the surface thus prepared with a material chosen from among hydrogen, molecules containing hydrogen, metals, organic molecules and inorganic molecules, wherein the preparing and the combining the surface with the material cooperate to obtain the predetermined electrical state of the surface.
Abstract:
A method for growing single-walled nanotubes comprises providing a silicon carbide semiconductor wafer comprising a silicon face and a carbon face, and annealing the silicon carbide semiconductor wafer in a vacuum at a temperature of at least about 1300 degrees Celsius, inducing formation of single wall carbon nanotubes on the silicon face.
Abstract:
The invention relates to a semiconductor device comprising at least two electrodes and at least one nanotube or nanowire, in particular a carbon nanotube or nanowire, the device including at least one semiconductive nanotube or nanowire having at least one region that is covered at least in part by at least one layer of molecules or nanocrystals of at least one photosensitive material, an electrical connection between said two electrodes being made by at least one nanotube, namely said semiconductive nanotube or nanowire and optionally by at least one other nanotube or nanowire.
Abstract:
The invention concerns a device for detecting and storing electromagnetic beams, an imager incorporating same, a method for making said device and use thereof. The inventive device comprises a field-effect phototransistor including: two source and drain contact electrodes, an electrical conduction unit which is connected to the two contact electrodes and which is coated with a photosensitive polymeric coating capable of absorbing the beams, of detecting, of generating in response the loads detected by said unit and of storing said loads, and a gate electrode which is capable of controlling the electric current in the unit as well as spatially distributing the loads in said coating and which is separated from said unit by a gate dielectric. Said device is configured such that the conduction unit comprises at least one semiconductive nanotube or nanowire capable of supplying an electric signal representing a modification of the conductivity of the phototransistor having been exposed to a beam, and that the gate dielectric has a thickness and a permittivity ε, which satisfy εr>0.2 nm* 1, so that the conductivity after exposition may be electrically reset in a reduced time and that the device forms at least one imaging pixel.