16 results about "Plasmonic coupling" patented technology

The invention provides a device and a method for catalytic degradation of CF4 through coupling of thermal medium reinforced plasma, and belongs to the technical field of environmental protection. A main body of the device is a cylindrical dielectric barrier discharge plasma reactor, a concentric heating ring is arranged in the reactor, and a thermal medium is introduced into the reactor, so that reaction gas and a catalytic material are heated, and the gas dissociation process is enhanced. Meanwhile, the catalyst is subjected to thermalization pretreatment, so that the CF4 degradation efficiency is improved. CF4 enters the reactor from a reaction gas inlet, and as a catalyst full-filling form is adopted in the reactor, a catalytic decomposition process is started after the CF4 enters the device. In the reaction process, the airflow direction is kept in full contact with the plasma micro-discharge channel in an orthogonal mode most of the time, and the plasma action effect is improved. Compared with the prior art, the device has the advantages that the enhancement effect of thermal medium assistance on the plasma coupling catalysis technology is fully exerted, the action effect of the plasma micro-discharge channel is improved, and the problem of low CF4 decomposition efficiency in the prior art is solved.

A device comprises a vacuum chamber configured to create a substantially atmospheric vacuum environment for plasma processing; a radio frequency (RF) power supply located outside the vacuum chamber; an RF matching network operationally coupled to the RF power supply; and a plurality of electrodes mounted inside the vacuum chamber, the plurality of electrodes configured to receive RF power signals from the RF power supply through the RF matching network. The RF power signals are delivered simultaneously to the plurality of electrodes during a sputtering operation. The plurality of electrodes and a set of electrical components are operable to control the inductive and capacitive reactance for coupling the RF power signals to provide more desirable plasma coupling during the sputtering process.

An apparatus includes a vacuum chamber configured to create a substantially atmospheric vacuum environment for plasma processing; a radio frequency (RF) power source external to the vacuum chamber; an RF matching network operably coupled to the RF power source; and a plurality of electrodes mounted within the vacuum chamber, the plurality of electrodes configured to receive an RF power signal from an RF power source through the RF matching network. During sputtering operation, RF power signals are simultaneously delivered to the plurality of electrodes. The plurality of electrodes and the set of electrical components are operable to manage inductive and capacitive reactance for coupling RF power signals to provide more desirable plasma coupling during sputtering operations.

The multi-dimensional plasmonic coupling system based on Ag@PVP and Au@Ag NCs for surface-enhanced Raman spectroscopy (SERS) detection of gentamicin relates to the field of analytical detection, and adopts hydrothermal synthesis to prepare Ag@PVP core-shell nanoparticles and Au@Ag core-shell cubes (Au@Ag NCs). Ag@PVP is induced to agglomerate by gentamicin, and then Au@Ag NCs are introduced to change the electromagnetic field of the nanoparticle agglomeration, so as to change the Raman characteristic peaks of gentamicin and distinguish it from its homologues. Under the optimized experimental conditions, the linear detection range of gentamicin is 10 ‑5 ~10 ‑9 M, the detection limit is 6.23 × 10 ‑10 M, and the relative standard deviation of SERS intensity is less than 10%. The method has the advantages of simple operation, high accuracy and sensitivity, and does not need complex operation technology, and meets the requirements of large quantities and rapid analysis and detection.

The application discloses a kind of nanocluster structures for improving light absorption efficiency, to provide a kind of nanocluster structure with stable high absorption efficiency under near-infrared light irradiation.The present application is based on the random agglomeration of nanochip cap structure monomer that only grows connecting molecule on cap surface, weaken the dependence of nanocluster structure on incident light polarization state;By wrapping the connecting surface into the cluster structure, reduce the contact between the connecting surface and the outside world, limit the number of particles in the cluster structure, limit the absorption spectrum widening of cluster structure by using the plasmonic coupling between limited particles, improve the light absorption efficiency of nanocluster structure.Based on the nanoprobes of the nanocluster structure have wide application prospect in photothermal therapy, biosensing, drug delivery and the like.

Methods of forming magnetic / plasmonic hybrid structures are disclosed. The methods include synthesizing colloidal magnetic nanoparticles; modifying the magnetic nanoparticles in a solution of polymeric ligands; binding metal seed nanoparticles to the surface of the magnetic nanoparticles; and performing seed-mediated growth on the metal seed nanoparticles by reducing a metal salt in solution to form the magnetic / plasmonic hybrid structures.

This invention relates to a flexible pretreatment device and method for oilseeds using infrared and plasma coupling, belonging to the field of raw material pretreatment technology. The pretreatment device includes: a housing, which is a box structure; a plasma generator installed at one end of the housing; an infrared radiation plate installed at one end of the housing, located on the same side as the plasma generator; a material tray located on one side of the plasma generator and the infrared radiation plate; a lifting platform connected to the material tray and driving the material tray to move within the housing; and a thermal imaging device installed on the infrared radiation plate and connected to a control system. Through the coupling and synergy of the infrared radiation plate and the plasma generator, the device balances energy consumption while retaining the benefits of infrared baking for improving oilseed flavor and oil yield, and utilizes the plasma field to sterilize the oilseeds to a certain extent, achieving efficient pretreatment of oilseeds.

Systems and methods for performing wavelength conversion via plasmon-coupled surface states are described that can be used for optical wavelength conversion to different parts of the electromagnetic spectrum ranging from microwave to infrared regimes in both pulsed and continuous wave operation.

The invention relates to the technical field of electronic measuring instrument manufacturing, and discloses a surface enhanced Raman detection system and method based on electric field regulation and control plasmon coupling. The system comprises a micro-fluidic chip assembly with a micron-order interdigital electrode, an electric field modulation driving unit, a photoelectric signal acquisition unit and a phase lock analysis and arbitration processing unit, and the electric field modulation driving unit applies periodic alternating current driving voltage to the interdigital electrode; the SERS active nanoparticles are driven by dielectrophoretic force to generate periodic aggregation and diffusion motion which is twice of the basic frequency, the phase-locked analysis and arbitration processing unit extracts the frequency doubling amplitude in the spectral signal as a concentration characterization value, and outputs a result only when a phase lag component is located in a preset effective interval. SERS signals are stripped from direct-current noise, and the measured signal-to-noise ratio and reliability are improved.

The utility model relates to the technical field of aviation composite material component manufacturing, in particular to a composite material surface treatment device. The composite material surface treatment device comprises a rack, a first door frame, a second door frame, a plasma system and a laser system, the first door frame and the second door frame are parallel and slidably arranged on the rack and both stretch across the upper surface of the rack, the plasma system is slidably arranged on the first door frame, and the laser system is slidably arranged on the second door frame. The plasma system and the laser system are both used for treating the surface of the composite material. Compared with the prior art, the device integrates a plasma system and a laser system, a set of multifunctional composite material surface treatment device is constructed, a plasma treatment technology, a laser treatment technology or a laser and plasma coupling treatment technology can be selected according to different requirements, the utilization rate of the device is effectively increased, and the cost is reduced. The surface treatment efficiency of the composite material is improved.

The application discloses an in-situ infrared double observation device and method of a variable plasma coupling structure, which comprises four parts of a plasma power supply unit, a gas supply and separation and purification unit, an in-situ reaction / observation unit and a signal acquisition control unit. The in-situ reaction / observation cavity realizes initiation of multiple discharge modes and in-situ observation by regulating electrode structure and power supply parameters, and simultaneously obtains evolution processes of steady-state products, transient gas-phase species and surface adsorption species. The high-voltage electrode at the top of the cavity is directly connected with a parameterized pulse power supply after being isolated by an insulating medium, and reaction raw gas is mixed into the cavity after being controlled by a flow controller, so that the discharge process is controllable and stable. The application has high function integration degree, can be widely used in surface processing and catalytic reaction processes dominated by plasma technology, is easy to reveal a high-selectivity production route of target products and realizes real-time optimization of a process through process control feedback, and has a good prospect in basic research and industrial application.

The invention relates to the technical field of gold nanomaterials, in particular to a cup-rod structure gold nanomaterial and a preparation method and application thereof. The gold nanomaterial comprises a super-long gold nanorod with a gold nanocup cavity structure at one end and / or a super-long gold nanorod with gold nanocup cavity structures at two ends, and a nano gap formed between a cup-shaped cavity growing at one end and / or two ends of the super-long gold nanorod and the super-long gold nanorod can promote strong plasmon coupling. The light absorption capacity and the near-field intensity of the cup-rod structure gold nano material are obviously improved; the asymmetric gold nanocup has magnetic plasmon resonance, the asymmetric gold nanocup is combined with the ultra-long gold nanorod, so that the asymmetry of the prepared cup-rod structure is greatly enhanced, the local electromagnetic field of the whole structure is remarkably enhanced, and especially the hot spot where the gold nanocup and the gold nanorod are combined has excellent SHG optical performance.

In alternative embodiments, provided are compositions, including products of manufacture and kits, and methods, for detecting proteases including detecting proteases in a biological sample. In alternative embodiments, products of manufacture, formulations, mixtures or kits are used for stabilizing (or substantially stabilizing) nanoparticles in a reversible aggregate, and, detecting the presence of a protease in a fluid, wherein optionally the products formulations or mixtures can aggregate or assemble into nanoparticles such that the nanoparticles undergo plasmonic coupling, and the plasmonic coupling is reversible (or substantially reversible) leading to monodisperse nanoparticles when a chemical cue or signal is added.

The utility model provides semiconductor equipment. The semiconductor equipment comprises a plasma reaction chamber, a flow control structure, an air nozzle and a plasma coupling coil, the flow control structure is arranged in the plasma reaction chamber, and the flow control structure is arranged between the etching target and the air nozzle; the flow control structure comprises an inclined side wall, the intersection point of the extension lines of the inclined side wall is located on one side of the etching target, and the side, close to the etching target, of the inclined side wall surrounds to form a vent hole, namely, the size of the lower end of the inclined side wall is smaller, and the lower end of the inclined side wall surrounds to form a vent hole; the flow control structure is used for limiting the plasma around the etching target, namely, the inclined side wall is used for guiding the plasma formed by the reaction gas to the lower end of the inclined side wall, and the plasma is guided to the periphery of the etching target through the vent hole formed by surrounding the lower end of the inclined side wall. Therefore, high-density plasma is gathered around the etching target, and the etching uniformity of the etching target is finally improved.

The application provides a plasmon coupling surface interface in-situ spectrum and imaging test system, which records reflected light intensity or spectrum while changing laser incidence angle, and when the incidence angle of the laser is just in the range of the optical near field and excites surface plasmon polariton of a silver film in a prism coupling manner, the minimum point of the reflected light intensity is observed, that is, surface plasmon resonance, the incidence light is kept to excite the sample at the resonance angle, and at this time, the target molecule system on the surface of the silver film scatters and absorbs the electromagnetic surface wave bound in the near field range, and re-emits the light signal to the far field. The system realizes in-situ combination of surface plasmon resonance, surface enhanced Raman scattering spectrum, total internal reflection fluorescence spectrum and imaging technology by collecting the light signals.

The application relates to the fields of optical precision measurement and nanophotonics, and discloses a single-nanoparticle plasmonic phase imaging system and a coupling effect measurement method. The system comprises a coherent light source module, a polarization state modulation module, a microscope objective module, a wavefront sensing module, an image acquisition module and a central processing module; two orthogonal polarization interferograms are obtained through polarization modulation, the phase is reconstructed and a differential phase image is generated, common-mode noise is suppressed, and the dipole phase signal of the nanoparticle is highlighted. The method further combines wavelength scanning and nanoscale spacing regulation to realize quantitative measurement of plasmonic coupling effect. The application improves the signal-to-noise ratio and positioning accuracy, and supports optical property characterization and near-field coupling mechanism research under single-particle scale.