摘要:
A light-emitting device comprises a structure defining an orderly and periodic series of cavities of nanometric dimensions, in which a process of catalytic combustion is confined. The dimensions and/or the distance between the micro-cavities are selected to obtain a light emission in the visible and prevent and/or attenuate at the same time emission of infrared radiation.
摘要:
A light emitting device comprises a substrate, a porous alumina layer having a regular series of cavities of nanometric size containing an emitting material, and two electrodes in contact with the emitting material and connected to an electric voltage source. The first electrode comprises at least part of an aluminum film deposited onto the substrate, on which the alumina layer has been previously grown through an anodization process.
摘要:
A process for manufacturing an electroluminescent device comprising the steps of: making an organic or inorganic templating frame, comprising monodispersed nanoelements, in particular nanospheres; providing said nanoelements with a sheath consisting of metal nanoparticles, each nanoelement with its sheath of metal nanoparticles forming a core shell. The core shells are assembled together so as to make the three-dimensional percolated layer, having cavities whose size is around wavelength.
摘要:
A light emitting ambipolar device of the type comprising at least a first and a second main electrode in electrical contact through a light emitting region comprising at least one carrier recombination layer and further comprising one or more further electrodes for controlling recombination in said light emitting region wherein said first and second main electrode and said one or more further electrodes for controlling the recombination in said light emitting region are arranged in planar configuration relative to said region, said one or more further electrodes for controlling the recombination identifying one or more insulating channels with respect to said light emission comprising said at least one carrier recombination layer.
摘要:
The generator comprises at least one source of pressurized gas and a closed hydraulic circuit containing a solution comprising an electrically conducting vehicle liquid in which a charge of micro- or nanoparticles of a metal material is dispersed. The circuit has at least one inlet port connected to the source so that, when in operation, it receives a flow of pressurized gas capable of causing circulation of the solution within the circuit in a predetermined direction, forming a two-phase gas-liquid mixture with it, a restriction in cross section, downstream from the inlet port calibrated in such a way as to cause an increase in velocity and condensation of the two-phase mixture, and at least one outlet port, located downstream from the restriction through which the gas mixed with the solution can be released and discharged from the circuit. The generator also comprises magnetic field generating devices, associated with a length of the hydraulic circuit lying between the inlet port and the restriction in cross section in order to generate an induction flux (10) at right angles to the direction of flow of the solution in that length of circuit, and at least one pair of electrodes placed in contact with the solution in that length of the hydraulic circuit, and facing each other in a direction essentially at right angles to the lines of force of the magnetic field and the flow direction of the solution in that length of circuit. The arrangement is such that, when in operation, an electric current whose strength depends on the flow velocity of the solution in that length of the hydraulic circuit, the strength of the associated magnetic field and the electrical resistance between the electrodes flows between the electrodes.
摘要:
An electroluminescent device (1) comprises a supporting substrate (2); at least two electrodes (3) positioned on the substrate (2); at least a three-dimensional percolated layer (4), positioned on the substrate (2) between the two electrodes (3), having a metallic mesoporous structure defining a multitute of cavities of micrometric or nanometric dimensions. Present in the cavities of the three-dimensional percolated layer (4) are a multitude of luminescent inclusions (5), which operate to emit light when energized by electrons which, as a result of electron tunneling, effect pass through the three-dimensional percolated layer (4).
摘要:
The present invention relates to a miniaturized device controlled by electromagnetic signals in the radiofrequency range for controlled release of substances or for controlled sampling of specimens, comprising a reservoir, and a closing system associated to said reservoir, where said closing system is constituted by a valve structure, closing-opening of which is controlled by the electromagnetic signal in the radiofrequency range.
摘要:
A light emitting device comprises a substrate, a porous alumina layer having a regular series of cavities of nanometric size containing an emitting material, and two electrodes in contact with the emitting material and connected to an electric voltage source. The first electrode comprises at least part of an aluminum film deposited onto the substrate, on which the alumina layer has been previously grown through an anodization process.
摘要:
The electricity generator comprises a microcombustor provided with a fuel injector and acting to produce at an exhaust outlet a flow of exhaust gas in plasma state comprising positive ions and electrons separated from one another, and a conversion device coupled to the outlet of the microcombustor. The conversion device comprises an electrically insulating duct coupled to the said outlet of the microcombustor and provided in its initial portion with separation and capture electrodes for capturing the negative charges (electrons) of the plasma in such a way that downstream the plasma comprises only positive ions. After the initial portion the duct has an intermediate portion provided with an outer cladding of conductive material insulated from the plasma, the ends of which are connectable to a load. In operation the flow of positive ions in the intermediate portion of the duct electrostatically induces in the conductive cladding a negative charge which propagates in the cladding along the direction of flow of the plasma in the intermediate portion of the duct thereby generating a flow of electric current in the load.
摘要:
A light-emitting device, in particular a backlight device, comprises a transparent substrate (2) having a front surface and a rear surface, in which associated to the rear surface are means for generating an electromagnetic radiation that is able to pass through the substrate and come out of the front surface. According to the invention, the device comprises a layer of porous alumina which operates so as to inhibit propagation of said electromagnetic radiation in the directions parallel to the plane of the substrate, thus improving the efficiency of extraction of light from the substrate and increasing the directionality of the emitted light.