1057 results about "Plasma resonance" patented technology

The invention discloses a microarray chip without solid walls based on LSPR (Localized Surface Plasmon Resonance) and application thereof. The substrate of the microarray chip is in a hydrophilic and hydrophobic mode and comprises a base, a plurality of hydrophilic regions and hydrophobic regions, wherein the hydrophilic regions are arranged on the base; the hydrophobic regions separate the hydrophilic regions; the surfaces of the hydrophilic regions are provided with metal nanometer material layers with local area surface plasma resonance attributes; the outer regions of the hydrophilic regions are not provided with the solid walls; the surfaces of the hydrophobic regions are provided with hydrophobic material layers. The microarray chip disclosed by the invention can be obtained by combining a peculiar affinitive molecule for detecting a substance to be detected on the substrate provided by the invention. The microarray chip disclosed by the invention has the advantages of easiness and convenience for use, low detection cost, accurate result, reusability, and the like, can be used for detecting multiple substances, such as micromolecules, heavy metal ions, proteins, bacteria, viruses, and the like, and has wide application prospect in the fields of medical health, environmental monitoring, scientific experiments, and the like.

The invention discloses a manufacturing method of a tunable triangular metal nano particle array structure. The method comprises the following steps: (1) selecting a substrate with a suitable model according to the requirement of transmission wavelength, and carrying out cleaning and hydrophiling treatment on the substrate; (2) evenly self-assembling a layer of nano spheres on the surface of the substrate; (3) etching the manufactured self-assembling nano sphere layer by using a reaction ion etcher (RIE) process to change the size of gaps between adjacent nano spheres; (4) self-assembling etched nano spheres to serve as a mould, and filling metals in gaps between adjacent nano spheres; and (5) removing the nano sphere self-assembling layer by using a Lift off process to obtain an array chip in a metal nano structure. The manufactured chip in the metal nano structure has controllable optical property, can be applied to fields such as local surface plasma resonance (LSPR) sensing, surface enhanced Raman spectroscopy (SERS) and the like, and can realize rapid detection of biologic and chemical molecules.

The invention relates to a reflection type color filter, comprising pixel arrays with three colors. A pixel structure with each color comprises a substrate, a metal layer positioned on the substrate, a dielectric layer positioned on the metal layer and a two-dimensional metal grating layer positioned on the dielectric layer, wherein the thickness of the metal layer is greater than the skin depth of visible light in the metal layer, and the surface plasma resonance frequency of the pixel structure is the frequency of the complementary color of the pixel color. The reflection type color filter performs optical filtering based on the subtractive theorem, and has the characteristics of high optical energy utilization rate, low angle sensitivity and insensitivity to polarization.

The invention relates to a preparation method of nanostructured array chip with surface plasma for resonance imaging. The preparation method is characterized by comprising the following steps: (1) selecting and cleaning a substrate; (2) using a vacuum evaporated coating to coat a first metal film on the substrate; (3) self-assembling a layer of polystyrene nanoparticles on the metal film; (4) coating a second metal film in a way of evaporation on the self-assembled layer so as to fill the gas between balls; (5) eliminating the nanoparticles with the Lift off technology; (6) using laser direct writing machine to manufacture a lattice mask plate of the level of micron; (7) adopting the photolithography to transmit the mask figure to the substrate; (8) acquiring the lattice figure through developing and stripping of photoresist; (9) using a chemical method to eliminate the excessive metal and photoresist; thus the metal lattice chip of the cyclical nanostructure can be formed. The method adopts the polystyrene nanoparticles for self-assembly so as to prepare the cyclical nanostructure, and thus is suitable for massive production of the nanostructure.

The invention belongs to the technical field of detection and particularly relates to lead ion colorimetric detection probes and an application method thereof. In the method, glutathione modified gold nanoparticles are used as colorimetric probes, glutathione combines with gold nanoparticles by utilizing sulfydryl groups of the glutathione for coordination to form a stable structure of which the surface contains two free carboxyl radicals. In the process of detection, the carboxyl radicals can coordinate with heavy metal ions; and by utilizing the property of surface plasma resonance of the gold nanoparticles, the existence of the heavy metal ion Pb2+ in aqueous solution can be indicated by the color change of the solution. The lead ion colorimetric detection probes have the advantages that: the sensitivity and selectivity are high; in-situ quick detection can be realized without large-size instruments; the detection results are visual and can be observed by naked eyes; the operation is simple and the cost is low; and the used solvents and the operation processes have no toxic or side effects.

In accordance with one aspect of the invention, a plasma reactor has a capacitive electrode driven by an RF power source, and the electrode capacitance is matched at the desired plasma density and RF source frequency to the negative capacitance of the plasma, to provide an electrode plasma resonance supportive of a broad process window within which the plasma may be sustained.

A multilayered nano transparent conductive film is of alternate structures of dielectric layer and metal layer, and the metal layer is between two dielectric layers which are symmetric in structure or non-symmetric in structure. Its preparing method is to first work out a computer analog program for photoelectric performance of multilayer film according to the characteristic metrix calculation formula of multilayer, the theory of plasma resonance and the electronic transport in metal continuous film, to optimize the design of D / M / D multilayer film structure including selecting and matching ofmaterial quality, film thickness, reflecting rate and conductive rate, predicting of several kinds for D / M / D multilayer film structure, and then to use vacuum vaporation coating method to make D / M / D multilayer film by using accurate film thickness detection system to record film thickness

The invention is a surface plasma syntonizing and surface enhanced Raman spectrum measure apparatus. Its main structure consists of laser source 21, angular instrument of initiate angle and polarize status adjustable together with polarize fins forms the light source system; sample table consists of edge glass of semi-circular or right angle or hemisphere and a basal chip with SERS activity. SERS signal detecting system made up of spectrograph and CCD detector. SPR signal detector is installed on one side of the edge glass while the light source system on the other side. The invention is adopted with the SPR detecting method of variable angle internal reflection, initiating the sample in the elapse field to obtain the SERS spectrum, and synchronizingly obtaining the SPR spectrum and the further enhanced SERS spectrum under syntonizing enhancing angle. Higher detecting sensitivity and s / n ratio can be obtained when measuring the SERS signal under dim background.

The invention relates to a method for preparing a boron nitride nanosheet-silver nanoparticle composite material by a simple liquid phase reduction method and belongs to the technical field of semiconductor material preparation. The preparation method is characterized by utilizing the liquid phase reduction method to prepare the boron nitride nanosheet-silver nanoparticle composite material. The process is simple, convenient and easy to implement, and low in equipment requirement, the composite material prepared by the method is low in impurity content, and silver nanoparticles generated on the surface layer of the boron nitride nanosheet are small in grain diameter, random in distribution and high in bonding strength with the boron nitride nanosheet. Researches show that the composite material has very good surface plasma resonance effect, can be applied to photoelectric detection technologies, has high surface enhanced Raman scattering activity, and has huge potential application in the field of bioprobes.

The present invention provides a protein micro-array surface plasma resonance imaging detection system and its detection method. Said system includes surface plasma resonance micro-array protein sensor, incident arm, reflecting arm and signal processing unit, the described sensor includes prism, micro-array chip and sample cell, between prism and micro-array chip a refractivity oil layer is coated, the incident arm is positioned at one side of the sensor, successively includes semiconductor laser, collimator, polarizer, attenuator and reactangular light diaphragm, the reflecting arm is positioned at another side of the sensor, and successively includes lens and CCD receiver, and signal processing unit includes signal processing circuit and computer.

The invention relates to a surface plasma resonance sensor chip and a preparation method thereof, in particular to a photografting molecularly imprinted polymer membrane-based surface plasma resonance sensor chip and a preparation method thereof, and belongs to the field of surface plasma sensor chip preparation. The chip comprises a glass substrate, a gold membrane layer, a unimolecular alkyl chain layer and a molecular imprinted polymer membrane, wherein the gold membrane layer is plated on the glass substrate, the unimolecular alkyl chain layer is self-assembled on the glass substrate, and the molecular imprinted polymer membrane is grafted on the unimolecular alkyl chain layer in turn. The molecular imprinted membrane with nanoscale thickness can be conveniently and quickly prepared on the surface of the gold membrane by the preparation method and has controllable thickness; the growth changes of the molecular imprinted membrane can be dynamically monitored in real time in situ; operation steps are simple and deoxidation and nitrogen protection are not needed; and the matrix type molecular imprinted structural units are easy to prepare on the surface of the gold membrane, each unit can be different template molecules and multi-channel and multi-target molecular detection is realized.

The invention discloses an optical microscope based on surface plasma resonance. The optical microscope comprises a laser generator, an incident angle adjusting module, a beam splitter, an optical microscopic amplification objective lens and a plasma resonance sensing chip all of which are arranged along a light path in sequence, and further comprises an image sensor. The incident angle adjusting module comprises a polarizing film used for transforming incident light into polarized light p. The incident light of the laser generator is incident on the plasma resonance sensing chip through the incident light adjusting module, the beam splitter and the optical microscope amplification objective lens at the surface plasma resonance angle theta to stimulate plasma surface resonance on the plasma resonance sensing chip, and the reflected light on the plasma resonance sensing chip is incident on the imaging sensor in an imaging mode through the optical microscope amplification objective lens and the beam splitter. The optical microscope has the advantages of being high in resolution ratio and free of fluorescence labeling.

The invention relates to a saturable absorber based on a plasmon axial vibration mode and belongs to the technical field of pulse laser. The invention particularly relates to a novel saturable absorber which consists of gold nanorods and film forming agent and can be used for mode-locked fiber lasers. The saturable absorber based on the gold nanorods can be prepared by adopting the method which comprises the steps of mixing the gold nanorod water dispersion and film forming agent water solution according to a molar ratio of (8-133):1, and performing ultrasonic dispersion for 2-5hours; and finally spin-coating the mixed solution on surfaces of flat silicon wafers and naturally drying the silicon wafers in a vacuum closed container till films are formed. The output of pulse laser at a near-infrared band is realized by using the unique longitudinal surface plasma resonance absorption characteristic of the gold nanorods. The saturable absorber based on the plasmon axial vibration mode enables the types of saturable absorbers to be expanded and can be widely used for mode locking of lasers at a visible-near infrared band.

The invention discloses a local plasma resonance refraction index sensor and a manufacturing method thereof. The local plasma resonance refraction index sensor comprises upper metal caps, medium columns and a lower metal aperture array, wherein the medium columns can be low-refractive-index dielectric media such as photoresist, and is positioned between the upper metal caps and the lower metal aperture array. According to the invention, through regulating an incidence angle, metal particles, the length of a period and particle lifting height, a figure of merit can reach 100; the local plasma resonance refraction index sensor can be widely applied to actual biochemistry sensing; and the preparation technique provided by the invention is simple, is low in cost, and is suitable for volume production.

The invention belongs to a supported two-dimensional layered molybdenum sulfide composite material and discloses a noble metal (Ag, Au)-supported composite nano-catalytic material and its application in catalytic reduction of p-nitrophenol. The two-step synthetic technology is adopted in the invention. Firstly, molybdenum sulfide nanosheet with a porous ultrathin structure is synthesized by a hydrothermal method; then, by an ultraviolet reduction technology, noble metal nanoparticles are supported onto the surface of the two-dimensional layered compound molybdenum sulfide with a sandwich structure, and agglomeration phenomenon during the noble metal preparation process can be effectively avoided by the combination of nano confinement growth effects; and finally, noble metal nanoparticles with uniform size distribution are obtained. According to the supported catalyst system, the metal catalytic active center and a carrier together form a catalyst due to localized surface plasma resonance effect of noble metal active ingredients and synergistic effect between noble metal active ingredients and the carrier.

The invention discloses a digital holographic microscopic imaging method based on surface plasma resonance and a microscope. In the microscopic imaging method, a linear polarization laser beam is expanded and collimated, and then is split into two beams, wherein one is a reference beam, the other enters a prism and is reflected by the prism surface provided with a metallic film to be an object beam; a sample to be tested is placed on the prism surface plated with the metallic film; after passing a combiner, the object beam and the reference beam enter a camera head to obtain a hologram and simultaneously obtain the strength allocation plan and phase allocation plan on the surface of the sample to be tested by a digital holographic reconstruction algorithm. The invention provides larger flexibility for selecting an incident angle, thereby having greater superiority. The surface image of a cell film, which is displayed by the phase microscopic image and the strength microscopic image obtained from the hologram, can not be obtained by the traditional microscope, therefore, the microscope of the invention has wide application prospect.

The invention relates to a surface-enhanced Raman scattering base with visible hot spots, a preparation method and a method for detecting molecules through the base. The SERS base is composed of a silver nanowire arranged on a Raman scattering substrate and gold nanoparticles modified on the surface of the silver nanowire. On the base, plasma resonance is formed between the silver nanowire and the gold nanoparticles, a strong electromagnetic field is generated, and therefore the visible hot spots are formed. The SERS base is placed under a Raman optical microscope, and the positions of the gold nanoparticles modified on the surface of the silver nanowire are SERS hot spots; the molecules to be detected are slowly dropwise added to the positions, and the molecules to be detected effectively fall into the SERS hot spot range. According to the preparation method, the gold nanoparticles are modified on the surface of the silver nanowire through the capillary force and gravity action simply. The SERS hot pots of the prepared base are visible, the molecules to be detected can effectively fall into the hot spot range, and the sensitivity of a detection result can be directly improved.

The invention belongs to the field of luminescent materials, and discloses an electroluminescent material and a preparation method thereof. The electroluminescent material has a genera chemical formula of N1-xR2O4:xLn, zM, wherein N is one or two of Zn, Ca, Sr and Ba; R is one or two of Al and Ga; Ln is one or two of Tm<3+>, Tb<3+>, Eu<3+>, Sm<3+>, Ce<3+> and Dy<3+>; M is one or two of Ag, Au, Pt and Pd metal particles; and x is more than or equal to 0.0001 and less than or equal to 0.2, and z is more than 0 and less than or equal to 1*10<-2>. For the electroluminescent material provided by the invention, by means of introducing the metal particles and using a surface plasma resonance effect generated on metal surfaces, the luminous intensity can be increased by 60 percent; meanwhile, the preparation method is simple in operation, is easy and pollution-free, is easy to control, and facilitates industrial production.

The present invention discloses a photoelectric sensor for detection of kinase activity on the basis of local area surface plasma resonance. The biosensor is prepared as follows: a semiconductor material metal oxide is modified onto an indium tin oxide electrode (ITO), then Kemptide, PKA, and a probe are assembled onto the electrode layer by layer, since the probe contains noble metal nanoparticles and photosensitizer tris (bipyridine) ruthenium, under visible light irradiation, the photosensitizer tris (bipyridine) ruthenium captures more photons, local area surface plasma resonance effect of the noble metal nanoparticles occurs under photon excitation, so that more electrons jump onto a semiconductor metal oxide conduction band to produce photocurrent. The biosensor quantitative detection is based on that different concentrations of PKA cause different extents of phosphorylation of Kemptide, so that the amount of the probe connected to the modified electrode is also different, and photocurrent changes are caused. The method has high sensitivity and selectivity, enzyme inhibition experiments also show that the method achieves the purpose of efficient and sensitive detection of the kinase PKA activity.

The invention discloses a P-type graphene / N-type germanium nanocone array schottky junction infrared photoelectric detector and a preparation method thereof. The preparation method is characterized by comprising the following steps of forming an insulating layer on the front face of an N-type germanium basal layer in an evaporation manner by taking the N-type germanium basal layer as a base region of the photoelectric detector; arranging an N-type germanium nanocone array on the upper surface of the N-type germanium basal layer; transferring P-type graphene to the N-type germanium nanocone array covered with the insulating layer; coating the P-type graphene with indium tin oxide (ITO) nano-particles in a spin manner to realize a P-type graphene / N-type germanium nanocone array schottky junction-based photodiode. According to the infrared photoelectric detector disclosed by the invention, by utilizing the structure of the germanium nanocone array and the characteristic of the surface plasma resonance of the ITO nano-particles, the ability of absorbing light is enhanced, and the ability of responding to light is improved; the preparation method disclosed by the invention is simple, is suitable for mass production, and can be used for preparing the infrared photoelectric detector which has high light absorption ability and is high in photoelectric conversion efficiency, and a foundation is laid for applying the germanium nanocone array structure to the photoelectric detector.

Provided is a light emitting diode (LED) having improved light emission efficiency, which can effectively overcome a technical limit of the related art by implementing a surface plasma resonance effect as well as reducing a layer defect such as threading dislocations in an LED structure.

The invention discloses a perovskite solar cell based on metal nanoparticle interface modification and a preparation method of the perovskite solar cell. In the perovskite solar cell, a thin layer of silicon dioxide coated gold (Au@SiO2) nanoparticles is additionally arranged between a hole transmission layer and a perovskite active layer of a planar heterojunction perovskite solar cell, the length of the Au@SiO2 nanoparticles is ranging from 20 nanometers to 60 nanometers, and the width of the Au@SiO2 nanoparticles is ranging from 5 nanometers to 25 nanometers; surface plasma resonance can be generated by the Au@SiO2 nanoparticles, so that the optical path of light in the perovskite active layer is increased, the absorption of the perovskite active layer to the light is improved, and the photoelectric conversion efficiency of the perovskite solar cell can be obviously improved; and compared with the perovskite solar cell without the Au@SiO2 nanoparticles, the photoelectric conversion efficiency of the perovskite soalr cell with the Au@SiO2 nanoparticles can be improved by over 35%. The preparation method of the perovskite solar cell based on metal nanoparticle interface modification, disclosed by the invention, is implemented by a solution technique at a low temperature, is high in repeatability and low in cost, and has a wide application prospect.

The invention provides a chip for an SPR bioreactor in the field of optical sensors as well as a preparation method and application of the chip. The chip is composed of a glass substrate, a graphene or graphene oxide / polymer compound film and a gold film generated in an evaporation manner in order from bottom to top, wherein the polymer compound is polyacrylic acid or a polyacrylate. According to the preparation method, a layer of graphene / polymer compound film material is added between the glass substrate and the gold film, and the detection sensitivity of the SPR sensor is enhanced by virtue of the surface plasma resonance effect, which is better than that of the gold film, of the graphene; the SPR sensor manufactured by use of the method is high in sensitivity, simple and convenient in preparation method, and widely applicable to the fields such as biology, medicine, chemistry and environments.

The invention discloses a supported core-shell catalyst with an oxide coated shell and a metal nanoparticle core and a preparation method of the catalyst. The preparation method comprises the following steps: by taking SiO2, graphite, carbon nano tubes (CNTs), Al2O3 and TiO2 as carriers, triggering heat on an interface between metal nanoparticles and a liquid-phase medium by illuminating by virtue of surface plasma resonance effects of the metal nanoparticles so as to trigger a shell forming thermal reaction of a metal oxide precursor to be localized on the interface, sequentially centrifuging, dipping, drying and calcining to obtain a supported metal @ oxide core-shell catalyst. The invention provides the novel preparation method of a core-shell structure; the method has the advantages that the preparation process is simple, the cost is low, the pollution is avoided and the shell forming reaction is only localized on the interface; and the supported core-shell catalyst has the characteristics that the dispersion performance is high, the particle diameter and shell thickness of the metal nanoparticles are uniform and controllable.

The invention discloses a phase measurement method and a measurement system thereof used for measuring high-precision surface plasma resonance; the method and the system utilize the polarization selectivity of the surface plasma resonance effect, polarizes the broadband light and detects the polarization by different polarization controllers, and achieves the interference of the polarization light in different polarization directions; simultaneously, interference fringes on the spectrum are generated by a certain delay difference led in among the polarization light in different polarization directions by utilizing the delay elements related to the polarization, thus achieving the object that the frequency domain phase response information of the surface plasma resonance effect is obtained by detecting the spectrum distribution with the interference fringes; therefore, complex optical systems such as interferometer and the like are avoided, the reliability and stability for system detection are increased, and integration, miniaturization and convenience are convenient for being realized. The method and the system can achieve extremely high system sensitiveness by combining a wavelength scanning type and a phase detection method.

This invention multifunction imager is made based on the surface plasma resonance phenomenon composed of p-polarized parallel light sources, a light incident angle modulation system, a sample transport and analysis system, a reflection light cut-away and modulation system, a detector, and a data register and process system. Said device utilizes the dispersion of P-polarized light and a prism to activate the resonance of sensing film surface plasma to test resonance signals. The resonance image signal or wave length scan resonance signal can be tested by conversion of light sources, the chip research result can be reached by micro-lattice process to sense film to realize spectrum conversion of image and resonance wavelength.

The invention discloses a gold nanoparticle-modified dendritic titanium dioxide nanorod array electrode, as well as a preparation method and an application of hydrogen production by photocatalytic water splitting. The gold nanoparticle-modified dendritic titanium dioxide nanorod array electrode comprises a trunk nanorod densely distributed with dendritic structures on the surface, wherein gold nanoparticles are uniformly loaded on the surfaces of the dendritic structures. The preparation method is composed of three steps, namely, preparation for a TiO2 nanorod array, preparation for a dendritic TiO2 nanorod array, and preparation for gold nanoparticle-sensitized dendritic TiO2 nanorod array. According to the nanorod array electrode, the preparation method, and the application, the compounding of electron-hole pairs is effectively suppressed; the photocatalytic water splitting efficiency of the material is increased; the light absorption range of the material is expanded to a visible region via the surface plasma resonance (SPR) effect of gold nanocrystalline, thus improving the activity of the photocatalytic water splitting of a photoelectrochemical cell, and the material is great in stability simultaneously. The preparation method disclosed by the invention is simple, excellent in the performance of hydrogen production by photocatalytic water splitting, good in chemical stability, and capable of realizing low-cost and large-scale application.

The invention provides an in-situ preparation method and application of an Ag / AgCl / NH2-MIL-101(Fe) composite photocatalyst with a spindle appearance, and belongs to the technical field of environmental pollution improvement. The in-situ preparation method comprises the following steps: preparing a NH2-MIL-101(Fe) nanometer material with a regular hexagon-shaped section and a spindle appearance according to a solvothermal method by taking FeCl3.6H2O and 2-amino-terephthalic acid as raw materials, wherein the average length of the edges of the nanometer material is about 700 nm, and the average length of the sides of the regular hexagon-shaped cross section is about 200 nm; preparing the Ag / AgCl / NH2-MIL-101(Fe) composite photocatalyst with the spindle appearance in situ according to an ultraviolet light reduction method. According to the method, the reaction between Cl- in the NH2-MIL-101(Fe) nanometer material and Ag+ in a silver nitrate solution, and the reducing action of ultraviolet light are utilized, and no other exogenous chlorine source is added, so that the in-situ preparation method is simple, convenient, and mild in condition; Ag / AgCl nano-particles are loaded on the NH2-MIL-101(Fe) nanometer material; electron transfer efficiency is further improved via the surface plasma resonance effect, so that the recombination probability of photogenerated electron-hole pairs is reduced, and gaseous pollutants are effectively degraded.

The invention relates to a detection optical fiber based on a surface plasma resonance principle and a sensor. The surface plasma resonance detection optical fiber comprises a fiber core and air holes arranged on the axial direction of the fiber core and is characterized in that the first air hole of a solution channel for detecting is positioned in the center of the cross section of the optical fiber; the inner wall of the first air hole is plated with a metal film; a sensing material is plated on the inner surface of the metal film; N second air holes are distributed in the fiber core and at the periphery of the first air hole uniformly and respectively; N is an integer of more than 1; and the connecting line of the central points of the N air holes is shaped like a regular N-side polygon. According to the detection, mutual influence among the conventional channels of various samples is avoided, the resonance spectrum is narrow, and the signal to noise ratio is high. The sensor breaks through the limit that the refractive index detection upper limit of the conventional similar sensor is less than 1.42 and can effectively detect the chemical organic solution with high refractive index.