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410 results about "Optical properties of carbon nanotubes" patented technology

The optical properties of carbon nanotubes are highly relevant for materials science. The way those materials interact with electromagnetic radiation is unique in many respects, as evidenced by their peculiar absorption, photoluminescence (fluorescence), and Raman spectra.

Bright metal flake based pigments

A flake-based pigment is provided having improved specular reflectance characteristics in the visible wavelength range. The flake-based pigment has a plurality of core flake sections each formed of a central reflector layer and dielectric support layers on opposing sides of the reflector layer. The resulting core flake section is a very thin three-layered structure that exhibits a uniaxial compressive strength much greater than a corresponding uniaxial tensile strength. This structure provides the benefits of rigidity and brittle fracture during manufacturing and application processes, which ultimately provides favorable planar and specular reflectance characteristics for the pigment in the visible wavelength range. A variety of outer coating layers can be formed around the core flake sections, such as various dielectric and absorber layers having thicknesses dependent upon the desired optical characteristics of the pigment.
Owner:JDS UNIPHASE CORP

Quantum dots, nanocomposite materials with quantum dots, devices with quantum dots, and related fabrication methods

The invention provides “engineered” nonlinear nanocomposite materials with an extremely large χ(3) and fast temporal response along with optical properties that can be precisely tuned to satisfy the requirements of a particular application (e.g., optical, thermal, mechanical, etc.). In particular, the magnitude of the linear and nonlinear index of refraction can be adjusted substantially independently of the absorption spectrum of the material. In addition, the optical characteristics can be engineered substantially independently from the mechanical and chemical characteristics, providing exceptional performance and flexibility in terms of device-incorporation and process-stability.
Owner:SAMSUNG ELECTRONICS CO LTD

Electrophoretic media and processes for the production thereof

A first electrophoretic medium comprises an electrically charged particle suspended in a suspending fluid, the particle having a polymeric shell having repeating units derived from at least one monomer the homopolymer of which is incompatible with the suspending fluid. A second, similar electrophoretic medium comprises a suspending fluid, and first and second types of electrically charged particle suspended in the suspending fluid, the two types of particle having differing optical characteristics but both having polymeric shells. The polymeric shells are arranged such that homoaggregation of the two types of particles is thermodynamically favored over heteroaggregation.
Owner:E INK CORPORATION

Optical analysis technique and sensors for use therein

The detection of a chemical specie of interest is accomplished by immobilizing sensing molecules on the inner wall of a liquid core optical waveguide, the waveguide comprising a capillary tube and the sensing molecules being selected to interact with the specie of interest carried by the liquid which forms the waveguide core. The interaction produces a change in an optical characteristic of the waveguide which may be detected by illuminating the waveguide with analysis light.
Owner:WPI TAG ACQUISITION LLC

Electrophoretic media and processes for the production thereof

A first electrophoretic medium comprises an electrically charged particle suspended in a suspending fluid, the particle having a polymeric shell having repeating units derived from at least one monomer the homopolymer of which is incompatible with the suspending fluid. A second, similar electrophoretic medium comprises a suspending fluid, and first and second types of electrically charged particle suspended in the suspending fluid, the two types of particle having differing optical characteristics but both having polymeric shells. The polymeric shells are arranged such that homoaggregation of the two types of particles is thermodynamically favored over heteroaggregation.
Owner:E INK CORPORATION

Quantum Dot Films, Lighting Devices, and Lighting Methods

Light-emitting quantum dot films, quantum dot lighting devices, and quantum dot-based backlight units are provided. Related compositions, components, and methods are also described. Improved quantum dot encapsulation and matrix materials are provided. Quantum dot films with protective barriers are described. High-efficiency, high brightness, and high-color purity quantum dot-based lighting devices are also included, as well as methods for improving efficiency and optical characteristics in quantum dot-based lighting devices.
Owner:NANOSYS INC

Top-emitting nitride-based light-emitting device and method of manufacturing the same

A top-emitting nitride-based light-emitting device and a method of manufacturing the same. The top-emitting nitride-based light-emitting device having a substrate, an n-cladding layer, an active layer, and a p-cladding layer sequentially formed includes: a grid cell layer formed on the p-cladding layer by a grid array of separated cells formed from a conducting material with a width of less than 30 micrometers to improve electrical and optical characteristics; a surface protective layer that is formed on the p-cladding layer and covers at least regions between the cells to protect a surface of the p-cladding layer; and a transparent conducting layer formed on the surface protective layer and the grid cell layer using a transparent conducting material. The light-emitting device and the method of manufacturing the same provide an improved ohmic contact to the p-cladding layer, excellent I-V characteristics, and high light transmittance, thus increasing luminous efficiency of the device.
Owner:SAMSUNG ELECTRONICS CO LTD +1

Plasmon generator and thermally-assisted magnetic recording head having the same

A plasmon-generator of the invention is configured to include a first configuration member including a near-field light generating end surface; and a second configuration member joined and integrated with the first configuration member and not including the near-field light generating end surface. The first configuration member is configured to contain Au as a primary component and to contain any one or more elements selected from a group of Co, Fe, Sb, Nb, Zr, Ti, Hf, and Ta, and is configured so that a content percentage X1 of the contained element is within a range between 0.2 at % or more and 2.0 at % or less. Thereby, thermostability, optical characteristic, and the process stability are satisfied. Also, heat dissipation and heat generation suppression effect are extremely superior.
Owner:TDK CORPARATION

Fibers with optical function

A fiber with a cross section having x-axis and y-axis directions includes an alternate lamination including a predetermined number of a first portion and a second portion adjacent thereto, which have different optical characteristics, and a clad arranged around the alternate lamination.
Owner:NISSAN MOTOR CO LTD +2

Quantum dot film

A quantum dot film comprises a quantum dot layer (101), a lower water-insulation oxygen-insulation protective layer (102), an optical adhesive layer (103), an upper water-insulation oxygen-insulation protective layer (104) and anti-adhesion layers (105), wherein the quantum dot layer (101) comprises silica gel particles (106), red / green quantum dots (107) adsorbed to the silica gel particles, adhesive (108) and diffusion particles (109); the optical adhesive layer (103) is used for bonding the quantum dot layer (101) and the upper water-isolation oxygen-isolation protective layer (104) and mainly comprises the following compositions in parts by weight: 85-100 parts of methacrylic acid diester monomers, 3-15 parts of thickening agents, 0.5-5 parts of coupling agents, 2-5 parts of initiators and 0.1-0.5 parts of accelerants. The brightness and the color saturation of the quantum dot film are unlikely to fade and the quantum dot film has good optical characteristics and long service life.
Owner:HEFEI LUCKY SCI & TECH IND

Cellulose composites comprising hydrophobic particles and their use in paper products

Polymer composite films were prepared by solvent casting suspensions of quantum dots (QDs) in cellulose triacetate (CTA) solution. The films were robust and possessed the optical properties characteristic of QDs. Transmission electron microscopy (TEM) images of the films revealed that the QDs were well dispersed within the CTA film matrix. The selective alkaline hydrolysis of QD / CTA films in 0.1N NaOH over 24 hours resulted in the surface conversion of CTA to regenerated cellulose. Optical properties of the films were probed both before and after the hydrolysis reaction using fluorescence spectroscopy, and were found generally unaltered. The cellulose surfaces of the alkaline treated films allow for facile incorporation of the films into paper sheets.
Owner:ABITBOL TIFFANY +1

Modulated optical tweezers

InactiveUS20060163463A1Reduce stiffnessFacilitate object ' escapeLaser detailsComponent separationMicrometerEngineering
A method and apparatus for selecting a specific fraction from a heterogeneous fluid-borne sample using optical gradient forces in a microfluidic or fluidic system are presented. Samples may range in size from a few nanometers to at least tens of micrometers, may be dispersed in any fluid medium, and may be sorted on the basis of size, shape, optical characteristics, charge, and other physical properties. The selection process involves passive transport through optical intensity field driven by flowing fluid, and so offers several advantages over competing techniques. These include continuous rather than batch-mode operation, continuous and dynamic tunability, operation over a wide range of samples, compactness, and low cost.
Owner:NEW YORK UNIV

Photoelectric converter and method for manufacturing same

A photoelectric conversion element is provided. The photoelectric conversion element includes a casing; and a stacked body enclosed within the casing, wherein the stacked body comprises: a working electrode having a porous oxide semiconductor layer having a sensitizing dye supported on a surface thereof; a counter electrode provided on a side of the porous oxide semiconductor layer of the working electrode facing the working electrode; and an electrolyte layer at least a part of which is formed between the working electrode and the counter electrode, and wherein an upper surface and a lower surface of the stacked body contacts directly or indirectly an inner surface of the casing, the portion of the casing at least contacting the working electrode being made of a material having an optical characteristic of transmitting sunlight.
Owner:THE FUJIKURA CABLE WORKS LTD

Polarizer protective film, polarizing plate, and image display apparatus

Provided is a polarizer protective film, which has high heat resistance, high transparency, high optical characteristics, and high mechanical strength, and is excellent in adhesion with respect to a polarizer. Further, provided are a polarizing plate using the polarizer protective film and a polarizer, which has high adhesion with respect to the polarizer protective film and the polarizer and is excellent in optical characteristics, and in particular, excellent in transmittance as viewing angle characteristics, and an image display apparatus of high quality using the polarizing plate. The polarizer protective film of the present invention includes a cellulose-based resin layer having a thickness of 0.3 to 3 μm on at least one surface of a transparent resin layer containing a (meth)acrylic resin having a lactone ring structure.
Owner:NITTO DENKO CORP

Antiflaming optical diffusion polycarbonate resin composition

An objective of the invention is to provide a flame-proof light-diffusing polycarbonate resin composition which can simultaneously satisfy the excellent optical characteristic and high flame-proof characteristic of light-diffusing polycarbonate. According to the invention, the flame-proof light-diffusing polycarbonate resin composition is provided, wherein the resin composition comprises the following components: 100 weight parts of aromatic polycarbonate resin (A component); more than 0.005 weight parts of optical diffusing agent (B component) relatively to the aromatic polycarbonate resin; 0.001-20 weight parts of flame retardant (C component) relatively to aromatic polycarbonate resin; and 0.01-5 weight parts of polytetrafluoroethylene (D component) relatively to the aromatic polycarbonate resin, wherein the polytetrafluoroethylene has protofiber forming capability. Furthermore the total amount of B component and D component is 0.03-8 weight parts.
Owner:TEIJIN KASEK KK

Method for preparing water-soluble fluorescent silicon quantum dots by using hydrothermal process

The invention belongs to the technical field of the preparation methods of the nanomaterials and specifically discloses a method for preparing water-soluble fluorescent silicon quantum dots by using a hydrothermal process. The method comprises the steps of firstly introducing an amino silane and a reducing agent into a solvent in which nitrogen is introduced and mixing, continuing introducing the nitrogen for protection for a while, next, transferring to a hydrothermal reaction kettle, and heating for reacting for a while, thereby obtaining the fluorescent silicon quantum dots having excellent chemical properties. The method has the advantages of low raw material cost due to the adoption of the amino silane as a silicon source, simple operation steps, direction synthesis in water phase, easy large-scale production, and being green and environment; the obtained quantum dots have high quantum yield and excellent chemical characteristics, and are small in particle size, evenly in distribution, non-toxic, good in biocompatibility and acid resistance; besides, the quantum dots have pH sensitive characteristic in a certain range, and can be widely applied to the biochemical and biomedical sensing fields such as biochemical detection, drug analysis, cell and living imaging and targeting tracing and also can be used as photovoltaic conversion and light-emitting display materials.
Owner:WUHAN UNIV

Multilayered polymeric structure and methods

Multilayered structures formed from two or more polymeric layers are fabricated to obtain a single structure preferably having advantages of each of the separate layers. Polyolefin-based substrates can provide a layer with a good balance of stiffness and impact resistance, excellent processability, and relatively lower cost. Tie layers, preferably physically positioned adjacent a polyolefin-based substrate layer, facilitates adhering additional layer(s) together with the polyolefin-based substrate. Suitable tie layers generally include a multicomponent blend of at least one vinyl cyanide-containing component and at least one styrenic block copolymer component. Preferably, the additional layers include at least one acrylate-based cap layer, which can have a glossy, scratch resistance outer layer with excellent optical characteristics.
Owner:LYONDELLBASELL ADVANCED POLYOLEFINS USA

Transplantable ultrathin nano-porous gold film and method for preparing the same

The preparation method for transplantable ultrathin nano porous gold film comprises: preparing Au-Cu alloy with vacuum evaporation method, thermal annealing, and removing alloy with acidic solution. This product can be used in catalysis, bio-sense, porous electrode and other fields as well as nano grating and non-linear optics fields for special optical and high light transmission features
Owner:FUDAN UNIV
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