34 results about "Metallic nanostructure" patented technology

The present invention relates to affinity biosensing using polarization of light scattering of aggregated noble metallic nanostructures to determine concentration of an analyte in a test sample. This new sensing system utilizes the changes in polarized plasmonic scattering from nanostructures as the nanostructures aggregate due to binding of the analyte to a binding partner attached to the surface of the metallic nanostructure.

The disclosure relates to metallic nanophotonic crescent structures, or “nanocrescent SERS probes,” that enhance detectable signals to facilitate molecular detections. More particularly, the nanocrescent SERS probes of the disclosure possess specialized geometries, including an edge surrounding the opening that is capable of enhancing local electromagnetic fields. Nanosystems utilizing such structures are particularly useful in the medical field for detecting rare molecular targets, biomolecular cellular imaging, and in molecular medicine.

The present invention relates to detecting and / or measuring scattering effects due to the aggregating metallic nanostructures or the interaction of plasmonic emissions from approaching metallic nanoparticles. The scattering effects may be measured at different angles, different wavelengths, changes in absorption and / or changes in polarization relative to changes in the distances between nanoparticles.

The present invention refers to an electrode comprised of a first layer which comprises a mesoporous nanostructured hydrophobic material; and a second layer which comprises a mesoporous nanostructured hydrophilic material arranged on the first layer. In a further aspect, the present invention refers to an electrode comprised of a single layer which comprises a mixture of a mesoporous nanostructured hydrophobic material and a mesoporous nanostructured hydrophilic material; or a single layer comprised of a porous nanostructured material wherein the porous nanostructured material comprises metallic nanostructures which are bound to the surface of the porous nanostructured material. The present invention further refers to the manufacture of these electrodes and their use in metal-air batteries, supercapacitors and fuel cells.

A surface-enhanced Raman scattering method and apparatus to sequence polymeric biomolecules such as DNA, RNA, or proteins is introduced. The method uses metallic nanostructures such as, for example, spherical or cylindrical Au or Ag nanoparticles having characteristic lengths of 10-100 nm which when illuminated with light of the appropriate wavelength produce resonant oscillations of the conduction electrons (plasmon resonance). Electric field enhancements of 30-1000 near the particle surface resulting from such oscillations increase Raman scattering cross-sections by about 106-1015 due to the E4 dependence of the Raman scattering, wherein the largest enhancements occur in the gap / junction between novel closely spaced structures as disclosed herein.

The invention discloses a negative-type nanometer stamping method, which comprises the following steps: (1) depositing metallized film I on the silicon base; hanging to coat the photo-etching glue on the metallized film I; (2) duplicating the mould plate nanometer pattern to the photo-etching glue in the heating and pressurizing condition; (3) transferring the pattern to the metallized film I through reaction ionic etching technique; (4) adapting photo-etching glue as mask to corrode the uncovered naked metal l; (5) preparing the metal nanometer structure. The invention avoids the traditional striping craft of nanometer stamping technique to produce smooth line metal structure, which reduces the cost and simplifies the control wire breadth through corrosion condition and time adjustment as well as prepares double-metal structure with deposited second metal after chemical corrosion.

The invention discloses methods for manufacturing a dielectric layer and an organic electroluminescent device. The method for manufacturing the dielectric layer comprises the following steps of: synthesizing a metallic nanostructure particle solution by using a chemical method; mixing the metallic nanostructure particle solution with a body, and stirring the mixed solution by heating at low temperature; and spin-coating the mixed solution on a substrate material by using a spin-coating method so as to obtain the dielectric layer after the mixed solution becomes a film. According to the organic electroluminescent device, a cavity transmission layer is formed by using the dielectric layer, and through a resonance enhancement of the resonant peak of plasmas on surfaces of metallic nano-particles in the dielectric layer and the emission peak of the organic electroluminescent device, the photoelectric properties of the device are optimized, and the luminescent efficiency of the device is increased.

The present invention provides for metallic nanostructures or nanoburgers comprising a dielectric layer positioned between metallic layers and their use in metal enhanced emissions systems to enhance emissions from fluorophores, including intrinsic and extrinsic; luminophores; bioluminescent species and / or chemiluminescent species. The multilayer nanoburgers exhibit several distinctive properties including significantly enhanced intensity of emissions, decreased lifetime and increased photostability by simply varying the thickness of the dielectric layer while maintaining a constant thickness of the two metallic layers on opposite sides of the dielectric layer.

A metallic composite in which a conjugated compound having a molecular weight of 200 or more is adsorbed to a metallic nanostructure having an aspect ratio of 1.5 or more, for example, a metallic composite in which a compound having a group represented by the formula (I) or a repeating unit represented by the formula (II) or both of them is adsorbed to a metallic nanostructure having an aspect ratio of 1.5 or more, is useful for electronic devices such as a light-emitting device, a solar cell and an organic transistor.

Disclosed are nanowires and a nanowire synthesis method, with the nanowires synthesized by adding first and second solutions into a vessel containing a porous template, the first solution added on one side of the porous template and the second solution added on another side of the porous template. The first solution contains a metal reagent comprising at least one of a transition metal, an actinide and a lanthanide metal, and the second solution contains a reducing agent.

In the present invention, a molecular analysis device comprises a substrate, and a waveguide with a planar integrating element and filter or reflector element adjacent thereto is disposed on the substrate. The waveguide comprises a coupling means configured for coupling a predetermined frequency range of laser radiation into the waveguide. At least one metallic nanostructure is disposed on or adjacent to the planar integrating element, at least one metallic nanostructure is configured such that the field intensity and the gradient of the laser radiation, that is coupled into the waveguide, are enhanced over a sufficiently large volume around the nanostructure to simultaneously cause plasmonic based optical trapping of analyte(s) in a medium, and plasmonic based excitation of the particles to produce Raman scattered radiation. A Raman scattered radiation collection means is disposed on the substrate for collecting said Raman scattered radiation produced by the particles.

A cavity free, broadband approach for engineering photon emitter interactions via sub-wavelength confinement of optical fields near metallic nanostructures. When a single CdSe quantum dot (QD) is optically excited in close proximity to a silver nanowire (NW), emission from the QD couples directly to guided surface plasmons in the NW, causing the wire's ends to light up. Nonclassical photon correlations between the emission from the QD and the ends of the NW demonstrate that the latter stems from the generation of single, quantized plasmons. Results from a large number of devices show that the efficient coupling is accompanied by more than 2.5-fold enhancement of the QD spontaneous emission, in a good agreement with theoretical predictions.

A method for making a desired pattern of a metallic nanostructure of a metal includes: (a) forming the desired pattern of a self-assembled monolayer matrix of a first organic compound on a substrate, the first organic compound having a tail group selected to be active toward deposition of the metal on the self-assembled monolayer matrix; (b) forming an inert layer of a second organic compound on the substrate by contacting an assembly of the substrate and the self-assembled monolayer matrix with a solution containing the second organic compound, the second organic compound having a tail group selected to be inactive toward the deposition of the metal on the inert layer; and (c) depositing the metal on the self-assembled monolayer matrix by contacting an assembly of the substrate, the self-assembled monolayer matrix and the inert layer with a solution containing metal ions, followed by reducing the metal ions.

Methods and systems for the super-resolution imaging can make visible strongly subwavelength feature sizes (even below 100 nm) in the optical images of biomedical or any nanoscale structures. The main application of the proposed methods and systems is related to label-free imaging where biological or other objects are not stained with fluorescent dye molecules or with fluorophores. This label-free microscopy is more challenging as compared to fluorescent microscopy because of the poor optical contrast of images of objects with subwavelength dimensions. However, these methods and systems are also applicable to fluorescent imaging. Their use is extremely simple, and it is based on application of the microspheres or microcylinders or, alternatively, elastomeric slabs with embedded microspheres or microcylinders to the objects which are deposited on the surfaces covered with thin metallic layers or metallic nanostructures. The mechanism of imaging involved use of the plasmonic near-fields for illuminating the objects and virtual imaging of these objects through microspheres or microcylinders. These methods and systems do not require use of fragile probe tips and slow point-by-point scanning techniques. These methods and systems can be used in conjunction with any types of microscopes including upright, inverted, fluorescence, confocal, phase-contrast, total internal reflection and others. Scanning the samples can be performed using micromanipulation with individual spheres or cylinders or using translation of the slabs. These methods and systems are applicable to dry, wet and totally liquid-immersed samples and structures.

The invention relates to a metallic @ GST medium heterogeneous nano core-shell structure and a preparation method thereof. The core-shell structure core is a metal nanoparticle with the surface plasmon resonance characteristic; and a shell is made of an amorphous phase change material GST. By integrating the dewetting effect of a nano-film under the condition of thermal annealing to a magnetron sputtering coating technology, the heterogeneous core-shell structure preparation the wrapping the metal nanoparticle with the GST is realized; the size of the metal nanoparticle can be adjusted by controlling a thickness of the film; and the GST is further deposited by magnetron sputtering, so that a target element is densely arranged on the metal nano structure based on the relatively strong surface activity performance of the metal nano structure, and the nano core-shell structure with adjustable thickness is obtained. Compared with a single-metal nano-structure, the phase characteristic of the outer-layer GST of the metal @ GST core-shell structure has a tuning effect on the surface plasmon resonance characteristic of the inner-layer metal nanoparticle, and the metallic @ GST medium heterogeneous nano core-shell structure has a wide application prospect in the fields of super-surface devices and the like. The method can realize large-area efficient preparation and is adjustable in property and wide in application range.

A hot carrier photodetector has been developed that absorbs approximately 80% of broadband infrared radiation by using a planar nanoscale back metal contact to silicon. Based on the principles of the hot carriers generation in ultrathin metal films, silicon-based CMOS image sensors are developed which operate in the IR diapason. The device uses absorption in an ultrathin metallic nanostructure to generate therein a non-equilibrium electron distribution which subsequently is injected into the silicon material via a Schottky contact at the Si body, thus generating a photoresponse to an incident IR radiation. A pixeled array including interconnected hot carriers metallic nanostructured cell(s) and traditional RGB elements is envisioned to enable RGB-IR imaging from a single silicon based wafer.

The invention relates to a preparation method for a large area surface-enhanced Raman active substrate by inclination growth. The preparation process comprises a first step of taking one substrate; a second step of washing the substrate with a physical and chemical method; a third step of obliquely placing the washed substrate in a growth chamber; and a fourth step of growing a metal nano structure on the substrate by a vapor deposition method to finish the preparation. The surface-enhanced Raman active substrate prepared by the method has the advantages of large area, simple process, a controllable structure, low cost and high reliability.

An intermediate layer (110) useful for coupling two individual organic photovoltaic devices (600) to provide a tandem organic photovoltaic device includes a first hole transport layer (114), a first electron transport layer (112), and a metallic nanostructure layer (116) interposed between the first hole transport layer (114) and the first electron transport layer (112). The metallic nanostructure layer (116) provides an efficient recombination point for electrons and holes. The metallic nanostructure layer (116) can include silver nanowires which providing outstanding optical properties and permit the formation of the metallic nanostructure layer (116) using a low temperature, solution based, process that does not adversely affect underlying layers.

It is intended to provide a stable metallic nanostructure that causes no aggregation when surface-modified with biomolecule-reactive functional molecules. 30 to 90% of the surface of a metallic nanostructure is covered with at least one or more types of colloid-stabilizing functional molecules. The remaining portions on the surface of the metallic nanostructure are further covered with one or more types of biologically functional molecules.

The present invention provides a pressure-induced phase transformation process to engineer metal nanoparticle architectures and to fabricate new nanostructured materials. The reversible changes of the nanoparticle unit cell dimension under pressure allow precise control over interparticle separation in 2D or 3D nanoparticle assemblies, offering unique robustness for interrogation of both quantum and classic coupling interactions. Irreversible changes above a threshold pressure of about 8 GPa enables new nanostructures, such as nanorods, nanowires, or nanosheets.

The invention relates to an optical device, in particular to an optical polarizer capable of dynamically adjusting an AT (asymmetric transmission) signal and a using method of the optical polarizer. The optical polarizer comprises a single-layer chiral structure formed by arranging a plurality of periodic units with the same structure in rectangular periodic arrays, wherein each metallic nanostructure unit comprises a metallic nanorod and an S-shaped metallic nanostructure, the metallic nanorod is formed by connecting a first constituent block and a second constituent block, the first constituent block is made of metallic magnesium, and the second constituent block and the S-shaped metallic nanostructure are made of precious metal. According to the structure, the size and position of the AT mode can be adjusted by adjusting the relative effective length of the metallic nanorods through dehydrogenation and hydrogen absorption, and the structure can be integrally formed; during use, theAT signal of the structure can be adjusted only by hydrogen absorption or dehydrogenation as required; preparation and use methods are simple and convenient, and operation is easy.