604 results about "Nanopillar" patented technology

A non-volatile solid state resistive device that includes a first electrode, a p-type poly-silicon second electrode, and a non-crystalline silicon nanostructure electrically connected between the electrodes. The nanostructure has a resistance that is adjustable in response to a voltage being applied to the nanostructure via the electrodes. The nanostructure can be formed as a nanopillar embedded in an insulating layer located between the electrodes. The first electrode can be a silver or other electrically conductive metal electrode. A third (metal) electrode can be connected to the p-type poly-silicon second electrode at a location adjacent the nanostructure to permit connection of the two metal electrodes to other circuitry. The resistive device can be used as a unit memory cell of a digital non-volatile memory device to store one or more bits of digital data by varying its resistance between two or more values.

A nanopost glass array contains up to 1012/cm2 of magnetizable nanoposts having diameter of 10-1000 nm that are straight and parallel to each other and are typically of a uniform diameter relative to each other and along the post length. The array is made using a reference electrode and a nanochannel glass template structure connected to each other electrically through an electrical source and both disposed in a plating solution. A magnetizable material is electroplated from the plating solution into the channels of the template structure.

Methods of forming a nano-scale electronic and optoelectronic devices include forming a substrate having a semiconductor layer therein and a substrate insulating layer on the semiconductor layer. An etching template having a first array of non-photolithographically defined nano-channels extending therethrough, is formed on the substrate insulating layer. This etching template may comprise an anodized metal oxide, such as an anodized aluminum oxide (AAO) thin film. The substrate insulating layer is then selectively etched to define a second array of nano-channels therein. This selective etching step preferably uses the etching template as an etching mask to transfer the first array of nano-channels to the underlying substrate insulating layer, which may be thinner than the etching template. An array of semiconductor nano-pillars is then formed in the second array of nano-channels. The semiconductor nano-pillars in the array may have an average diameter in a range between about 8 nm and about 50 nm. The semiconductor nano-pillars are also preferably homoepitaxial or heteroepitaxial with the semiconductor layer.

Provided according to embodiments of the invention are nanostructured surfaces that include a substrate; and an array of metallic nanopillar islands on the substrate, wherein each metallic nanopillar island includes a metal base layer on the substrate and a plurality of metallic nanopillars on the metal base layer, and wherein portions of the substrate between adjacent metallic nanopillar islands are free of the metal base layer. Also provided according to some embodiments of the invention are nanostructured surfaces that include a non-conductive substrate; and at least one nanoelectrode defined within the non-conductive substrate, wherein the at least one nanoelectrode is sized and/or shaped to immobilize an analyte or a probe molecule. Also provided are apparatuses and methods for SERS and detection of analytes or biological binding by EDL capacitance.

A nano-colonnade VCSEL device and a method of fabrication utilize a nanowire column grown nearly vertically from a (111) horizontal surface of a first layer to another horizontal surface of a second layer to connect the layers. The VCSEL device includes a first layer having the (111) horizontal surface; a second layer; and an insulator support between the first layer and the second layer that separates the first layer from the second layer. A portion of the second layer overhangs the insulator support, such that a horizontal surface of the overhanging portion is spaced from and faces the (111) horizontal surface of the first layer. The VCSEL device further includes a nanowire column extending nearly vertically from the (111) horizontal surface to the facing horizontal surface, and distributed Bragg mirrors adjacent to opposite end of the nanowire column.

Provided are a CMOS image sensor and a method for fabricating the same. A nanopillar is plurally formed at an upper end of a light receiving element.

A method for fabricating diamond nanopillars includes forming a diamond film on a substrate, depositing a metal mask layer on the diamond film, and etching the diamond film coated with the metal mask layer to form diamond nanopillars below the mask layer. The method may also comprise forming diamond nuclei on the substrate prior to forming the diamond film. Typically, a semiconductor substrate, an insulating substrate, a metal substrate, or an alloy substrate is used.

Nanocolumn chromatography devices useful, e.g., in CEC and nanoLC are disclosed. An exemplary chromatography device of the invention includes a nanocolumn, e.g., a capillary, packed with a particulate stationary phase material and a solid support. The solid support, or in situ frit, is adjacent to and integral with the stationary phase material. An in situ frit of the invention may be a mixture of the stationary phase material and a polymeric network of cross-linked poly(diorganosiloxane), e.g., poly(dimethylsiloxane), which may optionally be sintered. The invention also provides methods of making and using such devices.

A plasmonic grating sensor having periodic arrays of vertically aligned plasmonic nanopillars, nanowires, or both with an interparticle pitch ranging from λ/8−2λ, where λ is the incident wavelength of light divided by the effective index of refraction of the sample; a coupled-plasmonic array sensor having vertically aligned periodic arrays of plasmonically coupled nanopillars, nanowires, or both with interparticle gaps sufficient to induce overlap between the plasmonic evanescent fields from neighboring nanoparticles, typically requiring edge-to-edge separations of less than 20 nm; and a plasmo-photonic array sensor having a double-resonant, periodic array of vertically aligned subarrays of 1 to 25 plasmonically coupled nanopillars, nanowires, or both where the subarrays are periodically spaced at a pitch on the order of a wavelength of light.

A superhydrophobic surface with dual microscopic structures features that the micron-class arrays and nano-class arrays are prepared on the surface of polymer film through microprocessing and anodizing. The length, width, height and gap of microposts in array are 10-100 microns for micron array and 10-100 nm for nano-array. Its template can be cyclically used.

The present invention discloses a micro/nanostructure PN junction diode array thin-film solar cell and a method for fabricating the same, wherein a microstructure or sub-microstructure PN junction diode array, such as a nanowire array or a nanocolumns array, is transferred from a source-material wafer to two pieces of transparent substrates, which are respectively corresponding to two electric conduction types, to fabricate a thin-film solar cell. In the present invention, the micro/nanostructure PN junction diode array has advantages of a fine-quality crystalline semiconductor, and the semiconductor substrate can be reused to save a lot of semiconductor material. Besides, the present invention can make the best of sunlight energy via stacking up the solar cells made of different types of semiconductor materials to absorb different wavebands of the sunlight spectrum.

The invention discloses a method for generating a vector light beam based on a transmission-type medium metasurface, and belongs to the field of micro-nano optics. The method comprises the steps: selecting a noncrystalline silicon nanorod as a medium metasurface structure unit, carrying out the designing according to the geometric size of the nanorod, and enabling the nanorod to have a half wave plate function under the irradiation of light with the specific working wavelength; changing an azimuth angle of the nanorod unit and achieving the regulation and control of the polarization directionof an emergent optical field; obtaining the azimuth angle distribution of a nanorod array according to the polarization direction distribution of a target rod vector light beam, generating a processing file through coding, and carrying out the processing; and obtaining the target rod vector light beam after the incident polarization light passes through the medium metasurface. The invention also discloses a method for generating a vector light beam distributed in any polarization direction based on the transmission-type medium metasurface, and the method can be used for enabling a polarizationpattern to be hidden in the vector light beam, and is used for optical anti-fake occasions and polarization encryption occasions. The method can generate any vector light beam in a miniature and compact optical system.

Provided is a method for preparing an orderly gallium nitride nano pillar array with ultraviolet soft imprinting. A dielectric film is grown on a gallium nitride substrate, a metal orderly nano pillar (hole) structure is obtained through an ultraviolet soft imprinting double-layer stripping technology, a dielectric film nano pillar (hole) structure with a changeable and adjustable diameter is obtained through a reactive ion etching method, and inductively coupled plasma is used for being etched to obtain the gallium nitride orderly nano pillar (hole) array with different diameters. The dielectric film which comprises SiO2 and SiNx is grown on the gallium nitride substrate, and PMMA and ultraviolet curing glue coat the surface of a substrate sample in a rotary mode in sequence. A large-area low-defect orderly nano hole (pillar) array structure is formed on the ultraviolet curing glue through an ultraviolet soft imprinting technology, residual glue and the PMMA are then etched through a reactive ion etching technology, and the metal nano pillar (hole) array structure is obtained by stripping an evaporated metallic film. A dielectric film layer structure is etched through the reactive ion etching method, and the dielectric nano pillar (hole) structure with the changeable and adjustable diameter is obtained.

The invention relates to a femtosecond laser-controlled silicon surface nanopillar preparation method based on dual-wavelength electronic dynamic control, and belongs to the technical field of femtosecond laser application. The method comprises the steps that on the basis of local instant electronic exciting dynamic control, the wave length of the fundamental frequency laser is converted into 400 nm from 800 nm through a frequency doubling technology, and the surface micro-nano structural morphology is controlled by adopting a dual-wavelength femtosecond laser, wherein a first beam generates a generic plasma lens structure (PL) on the surface of a material, a second beam generates surface plasma along the edge of the generic PL structure and generates a gradient field distributed along the center of a light spot, and then the material generates the force extruding towards the center under the action of the pulse to form a convex nanopillar structure; preparation of large-area uniform nanopillar arrays is achieved through control over a procedure of a processing platform. Compared with an existing method, the preparation method has the advantages that the nanopillar processing precision and processing efficiency are effectively improved, efficient and precise control over the crystalline silicon surface nano structure is achieved, and the application value on the aspects such as information storage and solar cells is achieved.

A field effect transistor having a narrow channel and a method for forming such a device. An upstanding nanopillar is formed from a substrate by directional etching of the substrate preferentially masked by a nanoparticle. A stack of planar layers of material is formed adjacent and around the nanopillar. The bottom layer, adjacent the substantially planar top substrate surface, comprises insulating material. A conductive gate layer overlies the bottom layer while a second insulating layer overlies the gate layer. The pillar material is etched to leave a nanopore into which semiconductor material is deposited, forming an upstanding channel, after insulating material has been deposited on the interior of the nanopore. The source or drain may be a conductive substrate or a doped region of the substrate formed immediately beneath the nanopillar with the other electrode formed by doping the region adjacent the top of the channel.

The invention provides an asymmetric Au particle array and FP cavity coupled refractive index sensor which comprises an insulation substrate, a metal film reflection layer, a transparent medium layer and a two-dimensional metal unit array, wherein at least one surface of the insulation substrate is polished; the metal film reflection layer is deposited on a polishing surface of the substrate; the transparent medium layer is deposited on the metal film reflection layer; the two-dimensional metal unit array is formed on the transparent medium layer, each metal unit in the two-dimensional metal unit array is an asymmetric unit, and is composed of two metal nano columns arranged along the surface of the substrate, and an F-P cavity loop is formed between the two metal nano columns of each metal unit and the metal film reflection layer just below the two metal nano columns. According to the asymmetric Au particle array and FP cavity coupled refractive index sensor, by combining an asymmetric Fano resonance effect and coupling an LSP mode and an FP cavity mode, the full width at half maximum of a resonance valley of the sensor can be reduced, and thus the performance of a local area surface plasma sensor is improved.

The invention relates to a method for growing a group III nitride nanometer material, which comprises the following steps of: (1) epitaxially growing a GaN template, a SiO2 layer and a Ni metal film on a substrate in sequence; (2) enabling the Ni metal film to form self-organized nanometer Ni particles by using a two-step rapid thermal annealing method; (3) and etching the SiO2 layer by a dry method by using the self-organized nanometer Ni particles as a mask to form a SiO2 nanometer column; (4) etching the GaN template by the dry method by using the self-organized nanometer Ni particles and the SiO2 nanometer column formed by etching as masks to form GaN nanometer column array; (5) removing the SiO2 nanometer column and the nanometer Ni particles by using a BOE solution to obtain the GaN nanometer column array; and (6) growing the InN or InGaN group III nitride semiconductor material on the GaN nanometer column array, the side wall thereof and the bottom of the nanometer column array.

The invention discloses a cross epitaxial growth method of a semiconductor film, which comprises the following steps: (1) a nucleated metallic catalyst film is evaporated on a substrate material and island-shaped metallic catalyst particles which are evenly distributed on the substrate are obtained after the film is annealed; (2) in external equipment, a crystal nucleus is formed on the bottom of island-shaped metallic particles; and then nano-column arrays grow longitudinally; (3) a wet etching method is used for eliminating the metallic catalyst on a nano-column to obtain semiconductor nano-column array structures with the same orientation and height; (4) the etched nano-column is put into the external equipment and a lateral epitaxy technology is used for integrating the nano-column arrays into a flat surface; and then a semiconductor epitaxial film with the required thickness grows on the flat surface. As cross epitaxy occurs in nano area, defects and diffusion of residual stress can be effectively restrained and the quality of film crystals is more uniform than that of film crystals prepared by the traditional method, thus improving the crystal quality of two-dimensional semiconductor films; furthermore, the invention has simple method and wide applicability.

The invention discloses a tungsten trioxide nano-film with photocatalytic performance, and a preparation method thereof. The tungsten trioxide nano-film is characterized in that a WO3 nano layer with a WO3 nano structure is grown on a WO3 crystal seed layer, and the WO3 nano structure is shaped like a two-dimensional flying saucer including a middle main sheet and a nano-column. The preparation method of the tungsten trioxide nano-film comprises the steps of preparing a tungsten acid crystal seed layer precursor solution, preparing FTO (Fluorine-doped Tin Oxide) conductive glass with the crystal seed layer, preparing thermal tungsten acid solvent precursor solution, and finally performing hydrothermal synthesis to obtain the tungsten trioxide nano-film. According to the tungsten trioxide nano-film with photocatalytic performance, and the preparation method thereof, the specific surface area of the WO3 nano layer can be effectively enlarged; the efficiency of photocatalytic water splitting can be improved, the performance of photocatalytic water splitting in a photoelectric chemical pool is excellent, and excellent chemical stability can be achieved, the preparation method is simple, and the low-cost and large-scale application can be realized.

A method for forming an interconnect structure with nanocolumnar intermetal dielectric is described involving the construction of an interconnect structure using a solid dielectric, and introducing a regular array of vertically aligned nanoscale pores through stencil formation and etching to form a hole array and subsequently pinching off the tops of the hole array with a cap dielectric. Variations of the method and means to construct a multilevel nanocolumnar interconnect structure are also described.

The present invention provides systems, devices, device components and structures for modulating the intensity and/or energies of electrons, including a beam of incident electrons. In some embodiments, for example, the present invention provides nano-structured semiconductor membrane structures capable of generating secondary electron emission. Nano-structured semiconductor membranes of this aspect of the present invention include membranes having an array of nanopillar structures capable of providing electron emission for amplification, filtering and/or detection of incident radiation, for example secondary electron emission and/or field emission. Nano-structured semiconductor membranes of the present invention are useful as converters wherein interaction of incident primary electrons and nanopillars of the nanopillar array generates secondary emission. Nano-structured semiconductor membranes of this aspect of the present invention are also useful as directed charge amplifiers wherein secondary emission from a nanopillar array provides gain functionality for increasing the intensity of radiation comprising incident electrons.

The invention belongs to the technical field of nano-imprinting and spectra, and in particular relates to a multilayer structure surface enhanced Raman scattering base and a preparation method thereof. The surface enhanced Raman scattering base is simple in process, high in efficiency, high in enhancement factor and biocompatible. The base consists of a substrate and a periodic nano columnar structure which is positioned on the substrate, wherein the nano columnar structure is a multilayer structure; the multilayer structure consists of alternation layers and a gold layer; the alternation layers consist of silver and media; the gold layer is positioned on the topmost layer. A nano-imprinting technology is used as a core technology, and a reactive ion etching process, a metal evaporation process, a silicon dioxide plating process, a metal peeling process and the like are combined to prepare a multilayer nano structure, so that the technical problems that a silver structure base is not biocompatible and a gold structure base is low in enhancement factor are solved; on the basis of ensuring biocompatibility, the enhancement factor of the base is greatly improved, the detection is efficient and sensitive, and the base can be applied to biological detection after further treatment.