488results about How to "Increase scattering" patented technology

A field effect transistor for detecting ionic material and a method of detecting ionic material using the field effect transistor. The field effect transistor for detecting ionic material includes a substrate formed of a semiconductor material, a source region and a drain region spaced apart from each other in the substrate and doped with an opposite conductivity type to that of the substrate, a channel region interposed between the source region and the drain region, an insulating layer disposed on the channel region and formed of an electrically insulating material, a first reference electrode disposed at an edge of the upper portion of the insulating layer and a second reference electrode disposed to be spaced apart from the insulating layer.

A light emitting device comprises a novel low-loss array of conductive vias embedded in a dielectric multilayer stack, to act as an electrically-conductive, low-loss, high-reflectivity reflector layer (CVMR). In one example the CVMR stack is employed between a reflective metal bottom contact and a p-GaN semiconductor flip chip layer. The CVMR stack comprises at least (3) layers with at least (2) differing dielectric constants. The conductive vias are arranged such that localised and propagating surface plasmons associated with the structure reside within the electromagnetic stopband of the CVMR stack, which in turn inhibits trapped LED modes coupling into these plasmonic modes, thereby increasing the overall reflectivity of the CVM R. This technique improves optical light extraction and provides a vertical conduction path for optimal current spreading in a semiconductor light emitting device. A light emitting module and method of manufacture are also described.

A substrate for fingerprint contact includes a plate, and the plate includes a first surface and a second surface. The first surface is an optical diffusing surface. The optical diffusing surface is used for being contacted by a finger, and features hazed particles. The second surface faces an optical imaging system. The optical diffusing surface of the plate helps to enhance light to be evenly emitted to the finger and weakens the unnecessary scattered light to the optical imaging system, so as to enhance the recognition rate of a fingerprint when the optical imaging system is used for intercept the light applied on a finger.

A solar battery cell of a serial stacked structure, increasing scattering of light, exhibiting good power-generating efficiency per unit area, and ensuring high reliability and a large yield in the manufacturing process, is provided. The solar battery cell includes a plurality of power-generating regions connected in series, each having insulative transparent semiconductor, front electrode, intermediate transparent conductive film, photoelectric conversion layer formed of stacked semiconductor films, and back electrode, and a contact line electrically connecting the front electrode and the back electrode of the neighboring respective power-generating regions. One power-generating region has at least two photoelectric conversion layers with the intermediate transparent conductive films sandwiched therebetween. At least one member of nonconductor and/or semiconductor is provided between the intermediate transparent conductive film and the contact line to prevent direct contact thereof.

The invention discloses semitransparent light diffusion modified PC (Polycarbonate) and a preparation method thereof. The semitransparent light diffusion modified PC consists of the following components in percentage by weight: 96.4-98.2 percent of PC resin, 1-3 percent of light diffusing agent, 0.2-0.5 percent of antioxidant and 0.2-0.5 percent of processing aid. The semitransparent light diffusion PC prepared with the method is in the form of semitransparent particles, is applied to an LED (Light-Emitting Diode) lamp shield and a lighting tube, can be used for effectively reducing the light ray intensity, is vaporous integrally without exposing a light source and has soft light rays, and has the advantages of simple process, convenience for operating, low cost and wide application prospect.

The invention discloses a terahertz isolator device of a magnetic surface plasma waveguide and a control method thereof. The asymmetric and periodic surface plasma waveguide is formed by a metal wall and a semiconductor indium antimonide pillar array. By exerting an external magnetic field under low temperature, the indium antimonide shows the revolving electrical property, and the structure can generate a magnetic surface plasma mode, so that the function of unidirectional isolation transmission of the terahertz wave can be achieved. The unidirectional transmission working frequency range is higher than 1THz, the bandwidth is larger than 80 GHz, the isolation reaches 90dB, the insertion loss is lower than 0.25dB, and tuning on the working frequency range can be performed by controlling the external magnetic field strength. Under the temperature of 186K, the frequency of the external magnetic field can be adjusted to 0.7T from 0.1T, and the central working frequency of a unidirectional transmission frequency band of the device can be tuned to 1THz from 1.42THz. The terahertz isolator is low in loss, high in isolation, tunable in broadband and capable of reducing echo and scattered noises in a terahertz application system and improving transmission quality of the terahertz beam.

The invention provides a microwave anechoic chamber performance measuring method, which comprises the following steps of: adopting a microwave anechoic chamber performance measuring system, and setting a dead zone parameter, a measuring frequency, a signal source power, a scanning trace and a kinematic velocity of a receiving antenna, and a rotation direction and a rotation velocity of a transceiving antenna according to the requirements of a microwave anechoic chamber performance analysis test; driving a signal source according to the signal source power; driving each stepping motor to control each moving part to move according to the scanning trace and the kinematic velocity of the receiving antenna, and the rotation direction and the rotation velocity of the transceiving antenna; and controlling a signal receiver to receive a signal of the receiving antenna according to the measuring frequency, and storing the signal. The method can be adopted to be applied in a microwave anechoic chamber flexibly so as to measure along different scanning traces; and a computer is adopted to realize automatic measurement of microwave anechoic chamber dead zone reflectivity level, cross polarization character, multi-path loss uniformity, and field uniformity performance indexes, so that the measuring efficiency is improved.

The invention relates to an extinction material for a biaxially oriented polypropylene (BOPP) film and a preparation method for the extinction material. The extinction material is characterized by comprising the following raw materials in part by weight: 30 to 60 parts of polypropylene (PP) resin, 30 to 60 parts of high density polyethylene, 2 to 15 parts of inorganic extinction powder, 2 to 10 parts of polybutylene terephathalate (PBT), 1 to 3 parts of dispersing agent and 0.1 to 1.0 part of antioxidant, wherein the total parts of the components are 100. By the extinction material for the BOPP film, a uniform extinction layer can be provided, high haze and high-temperature resistance are achieved, an extinction layer can be thinned for a BOPP film manufacturer, and the production speed and production efficiency of the extinction film are improved.

The invention discloses an intravascular ultrasonic focusing method, focusing diagnostic device and focusing energy transducer. The intravascular ultrasonic focusing method comprises: sending an intravascular ultrasonic focusing diagnostic device to a far-end of a site of lesion; emittingultrasonic signals at 360 DEG to the inside of a blood vessel. The intravascular ultrasonic focusing diagnostic device includes an ultrasonic catheter, awithdrawing/drive apparatus and anelectronic imaging system. The front end of the ultrasonic catheter is provided with the intravascular ultrasonic focusing energy transducer. The rear end of the ultrasonic catheter is connected to the withdraw/drive apparatus which is connected to the electronic imaging system. The intravascular ultrasonic focusing energy transducer includes ultrasonic energy transducer units and a focusing unit. The ultrasonic energy transducer units serve to emitultrasonic signals and receive an ultrasonic signal that is reflected. The focusing unit serves to focus the ultrasonic signalemitted by the ultrasonic energy transducer unit. According to the invention, the resolution of the diagnostic device is increased and the signal to noise ratio of the imaging of the diagnostic deviceis increasedby using intravascular ultrasonic focusing technology, so that the diagnosis precision is increased.

The invention relates to a high-temperature thermal barrier coating material. The high-temperature thermal barrier coating material is rare earth niobate and a solid solution thereof. The chemical constitution of the rare earth niobate is Ln3NbO7, and Ln comprises the rare earth elements of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y and Sc. The chemical constitution of the solid solution is Ln3(Nb1-xTax)O7 (x is larger than or equal to 0 and smaller than 1). Ln is a combination of one or more than one of the rare earth elements. The high-temperature thermal barrier coating material is characterized in that the heat conductivity of the material is low, when the temperature is 1000 DEG C, the intrinsic thermal conductivity of a compact block body is 1.1-1.4 W/m.k, compared with a commercial yttria-stabilized zirconia (YSZ) material (the thermal conductivity is about 2.5 W/m.k) with the weight percentage being 7%-8%, the thermal conductivity of the material is reduced by a large margin, and the material keeps phase stability and excellent oxygen-resistance capacity from the indoor temperature to the temperature of 1600 DEG C. The material can be applied to protection of high-temperature metal hot end parts of gas turbines or aero-engines.

The invention discloses a high-performance thermoelectric device and an ultrafast fabrication method thereof. In the high-performance thermoelectric device, a segmented structure is employed to perform optimal matching of a thermoelectric material and a temperature difference environment, a blocking layer and a buffer stress layer are employed to reduce interface element migration and longitudinalcontact thermal expansion stress and improve bonding strength, a phonon scattering layer and a negative thermal expansion buffer layer are embedded to fix a thermoelectric leg so as to improve internal thermal resistance and horizontal thermal matching performance of the high-performance thermoelectric device, internal package and external package are employed to prevent the thermoelectric material from being oxidized and sublimed and improve external collision-resistant capability, the technical bottlenecks of low energy conversion efficiency, small specific power, poor thermal stability, poor collision performance, complicated fabrication process and the like of a traditional thermoelectric device are effectively broken through, meanwhile, the thermal stability and the mechanical structural performance of the high-performance thermoelectric device are improved to a great extent, long-term and excellent electrical output performance is guaranteed, and the working environment is expanded.

The invention relates to a needle mushroom cultivation matrix formula which is prepared from the following components and raw materials: by weight, 30-40 parts of modified rice chaff, 25-35 parts of camellia oleifera seed husk, 10-15 parts of vinegar residue, 5-10 parts of soybean cake, 5-10 parts of pine scale, 20-30 parts of cotton seed hull, 2-4 parts of potassium dihydrogen phosphate, 1-2 parts of zeolite powder, 10-15 parts of modified plant ash and 4-5 parts of nutritive soil. The cultivation base has good air permeability and wide raw material sources, reduces the windage loss of the plant ash, and realizes the economic benefit of waste matter utilization. The needle mushroom cultivated by the cultivation base has the characteristics of high contents of trace elements, vitamins and amino acids, and is quick in growth speed, high in yield and low in raw material cost.

The invention relates to a surface nano grating-based wavelength tunable vertical cavity surface emitting laser and a preparation method, which belong to the field of semiconductor photoelectronic devices. The laser has an inner cavity contact laminated structure; a positive electrode layer (1) is arranged on a P-type ohmic contact layer (5); an air-gap layer (12), a gallium arsenide layer (2a), and a gallium aluminum arsenide layer (2b) are arranged above the ohmic contact layer (5) in turn; a gallium aluminum arsenide oxidation current limitation layer (6), an active region (7), an n-type gallium aluminum arsenide layer (8a), an n-type gallium arsenide (8b), an n-type gallium arsenide substrate (10), and a substrate electrode layer (11) are formed below the ohmic contact layer (5) in turn; and a nano grating (15) is positioned on the surface of the gallium arsenide layer (2a). The thickness of the air-gas layer can be subjected to mechanical adjustment of an electrostatic force and the like, so that photon phase change can be transmitted in the resonant cavity of a laser and an outputted light beam passes through the nano grating (15) immediately; therefore, a wavelength and polarization can be simultaneously controlled.

The invention discloses switchable glass based on a subtractive color mixing method. The switchable glass comprises two opposite light transmission substrates, the space between the two light transmission substrates is packaged to form an adjustment region filled with liquid crystal mixtures, and the liquid crystal mixtures include photopolymerizable liquid crystal monomers, dichroic dyes, common dyes, photo-initiators and negative liquid crystals. When voltage is not applied, the negative liquid crystals are perpendicular to the light transmission substrates and arranged in a single-domain manner, and molecules of the dichroic dyes are similarly perpendicular to the light transmission substrates. As absorbed light of the dichroic dyes is the weakest and the dichroic dyes are colorless, light transmission rate is the highest at the moment. When the voltage is applied, the negative liquid crystals are turned to the direction parallel to the light transmission substrates, the dichroic dyes are driven to rotate in the turning process, the negative liquid crystals are parallel to the light transmission substrates and arranged in a multi-domain manner after turning as polymer networks are irregularly distributed, and the switchable glass is transformed from a light transmission state into a light scattering state and is in a colored fuzzy state according to the subtractive color mixing method.

Disclosed is an optical fiber article for receiving pump radiation of a first wavelength for amplifying or generating radiation of a second wavelength. The optical fiber article includes a core for propagating light of the second wavelength. The core has a first index of refraction and includes a rare earth material. A cladding surrounds the core and has a second index of refraction that is less than the first index of refraction. The outer circumference of the cladding can include a plurality of sections, where the plurality of sections includes at least one substantially straight section and one inwardly curved section. The optical fiber article can also include at least one outer layer surrounding the cladding, where the index of refraction of the outer layer is less than the second refractive index. Methods for producing the optical fiber article are also disclosed, as well as methods for providing a preform for drawing such an optical fiber article.

A preparation method of Fe3O4@PEG@SiO2 artificial antibody for detecting thifensulfuron methyl comprises modifying the surface of Fe3O4 magnetic nanoparticles with polyethylene glycol 2000, coating the surface with SiO2 shell layer to form a core-shell-shell structure, diluting marker molecules in the SiO2 shell layer to form specific recognition site holes complementary with marker molecular structure, size and functionality so as to arrive at molecular selective recognition and detection for target analyses. The preparation method of the artificial antibody comprises the steps of first, preparing Fe3O4 magnetic nanoparticles, and modifying their surface with polyethylene glycol; second, adding the target molecule thifensulfuron methyl, a crosslinking agent and a catalyst, and hydrolyzing to obtain Fe3O4@PEG@SiO2 particles with surface-marked thifensulfuron methyl; third, diluting template molecule with a mixed solution of acetic acid and acetone having a volume ratio of 1:4 to obtain the Fe3O4@PEG@SiO2 artificial antibody with selective recognition marker molecules, the antibody having maximum saturated binding capacity of 41.28 mg/g for thifensulfuron methyl, the absorption rate reaches 0.45 mg/g.min within first 30 min which is 5.34 times and 3.46 times that of a non-marking method.

A showerhead with oscillating water includes an inlet passage connected to an outlet passage and an oscillator assembled inside the shower head. The oscillator has a main body with an inlet, a ball shaped oscillating cavity, and an outlet. The ratio of the inner diameter of the inlet, the inner diameter of the oscillating cavity and the minimum inner diameter of the outlet is 1:2.5-5:1.1-1.35. The water of the inlet flowing into the oscillating cavity divides into a main waterway and a feedback waterway, water of the main waterway flowing out of the outlet through the oscillating cavity, water of the feedback waterway flows back to the inlet through the cavity wall of the oscillating cavity, water of the main waterway flows out of the outlet in a circumferential cyclical shaking way under the compact of the water of the feedback waterway.

The invention relates to a coprinus comatus cultivation base which is prepared from the following component raw materials: by weight, 60-70 parts of cottonseed shell, 8-10 parts of wheat straw, 10-25 parts of bean cake, 4-5 parts of purple potato powder, 1-2 parts of gypsum, 10-15 parts of modified plant ash, 8-10 parts of zeolite powder, 8-10 parts of ginseng leaf powder, 8-10 parts of Chinese wolfberry powder and 8-10 parts of red jujube powder, and in every cubic meter of the cultivation base, 200-500 g of the nutritional soil is added. Coprinus comatus cultivated by using the cultivation base has the characteristics of high contents of minerals, trace elements, vitamin B, vitamin C and amino acids, can reduce heavy metal pollution, has the effects of nourishing face and replenishing blood by long term consumption, and is quick in growth speed, high in yield and low in raw material cost.