92 results about "Photo responsive" patented technology

A replaceable, electronically-isolated, MCP-based spectrometer detector cartridge with enhanced sensitivity is disclosed. A mass detector is electro-optically isolated from a charge collector with an electron multiplier for converting a charged particle into a multiplicity of electrons and a scintillator for converting the multiplicity of electrons into a multiplicity of photons. A light sensor is provided to convert the multiplicity of photons back into electrons which are summed into a charge pulse. The light sensor is realized by any of a plurality of photo-responsive devices.

An electron emitter assembly and a method for generating electron beams are provided. The electron emitter assembly includes a light source configured to emit light. The electron emitter assembly further includes a photo-responsive device operably coupled to an electron emitter device. The photo-responsive device induces the electron emitter device to emit electrons in response to receiving the light. Finally, the electron emitter assembly includes an anode receiving the emitted electrons from the electron emitter device.

A polymer-based field effect transistor photosensitive to incident light, which may enhance the transistor's characteristics and controlling parameters of the transistor state. The transistor is comprised of a metal-insulator-semiconductor structure with the insulating and semiconducting layers made of a polymeric media. The semiconducting polymer which also is photoconducting, forms the charge transport layer between the source and drain. The transistor exhibits large photosensitivity indicated by the sizable changes in the drain-source current, by a factor of 100–1000 even at low levels of light with illumination of approximately 1 mlux. The photosensitivity of the transistor is further enhanced with introduction of dilute quantity electron acceptor moieties in the semiconducting polymer matrix. Several applications of the light-responsive polymer-transistor are disclosed, such as use as a logic element and as a backbone of an image sensor.

An electron emitter assembly and a method for generating electron beams are provided. The electron emitter assembly includes a light source configured to emit light. The electron emitter assembly further includes a photo-responsive device operably coupled to an electron emitter device. The photo-responsive device induces the electron emitter device to emit electrons in response to receiving the light. Finally, the electron emitter assembly includes an anode receiving the emitted electrons from the electron emitter device.

An article identifier or code including at least one photo-responsive dye and a method of encoding or embedding information in same. A reader device for decoding or extracting information in an article identifier or code and verifying or authenticating that information and the associated extraction and authentication methods.

Methods, systems and apparatus for photo-processing of fluids, particularly complex fluids, such as blood products, pharmaceuticals, injectables and vaccines, are provided. The disclosed methods and systems employ non-laser light source(s) to generate monochromatic light energy, preferably in the range of 260 nm to 310 nm, for fluid treatment. Advantageous processing regimens and / or adjunct additives and / or agents may also be used to achieve desired and / or enhanced results, e.g., inactivation of pathogens, bacteria and / or viruses, modulation of immune response, and / or leukoreduction. Particularly preferred embodiments include novel temperature control systems and geometric / structural arrangements that provide enhanced processing results and / or efficiencies. The disclosed methods, systems and apparatus achieve desirable results in a broad range of diagnostic, therapeutic and treatment applications, and generally provide enhanced operating efficiencies and / or processing results in application modalities that employ a broad range of photo-activated and / or photo-responsive materials and / or compounds.

Provided is a method of fabricating an organic light emitting device using a solution process. The method includes forming an electrode on a lower substrate; depositing an organic active material solution containing at least one photoreactive material on the electrode to form an organic active material layer; and radiating light onto the organic active material layer so that a characteristic of the light varies according to the depth of the organic active material layer in order to gradually vary a molecular orientation structure in the organic active material layer according to the depths, thereby resulting in a carrier mobility gradient according to the depths of the organic active material layer.

A photo-responsive UV pressure-sensitive adhesive and a preparation method of same. The pressure-sensitive adhesive is composed of four parts including 30-70% of an acrylate-type copolymer, 3-21% of a photo-responsive monomer, 21-63% of a photo-polymerization monomer, and 0.6-1.4% of a photoinitiator. The pressure-sensitive adhesive is prepared through the steps of: dissolving the polymer in the photo-polymerization monomer, adding the photo-responsive monomer and the photoinitiator and uniformly mixing the components; and irradiating the mixture by means of ultraviolet light of which the wavelength [lambda] is more than 390 nm and is less than 450 nm to cure the mixture to prepare the pressure-sensitive adhesive, and meanwhile, performing mask exposure to form patterns. The pressure-sensitive adhesive is reduced in stripping strength after being irradiated by means of ultraviolet light of which the wavelength [lambda] is more than 300 nm and is less than 360 nm, so that the pressure-sensitive adhesive is easy to strip. The stripping strength is recovered after the pressure-sensitive adhesive is irradiated by means of ultraviolet light of which the wavelength [lambda] is more than 200 nm and is less than 270 nm. The pressure-sensitive adhesive, when being used, has high stripping strength and good adhesion performance. When the pressure-sensitive adhesive is used or is mis-adhered, stripping strength of the pressure-sensitive adhesive can be reduced just by irradiating the pressure-sensitive adhesive by light, so that the pressure-sensitive adhesive is easy to strip. The stripping strength is recovered when the stripped pressure-sensitive adhesive is irradiated by light, and the pressure-sensitive adhesive can be used continuously. The pressure-sensitive adhesive is energy-saving, environment-protective and can be used repeatedly.

Organic-inorganic hybrid perovskite (OIHP) based photo-responsive devices include an OIHP active layer disposed between a cathode layer and an anode layer, and an electron extraction layer disposed between the cathode layer and the active layer. The electron extraction layer includes a layer of C60 directly disposed on the active layer. The active layer includes an organometal trihalide perovskite layer (e.g., CH3NH3PbI2X, where X includes at least one of Cl, Br, or I).

The invention relates to photo-responsive controlled-release nano-pesticide preparation and a preparation method and application thereof. A controlled-release effective constituent of the preparation is amphiphilic carboxymethyl chitosan derivative which is obtained through reaction between o-nitro benzyl hemisuccinate and carboxylmethyl chitosan. The preparation is prepared by the following steps: taking water solution of the carboxymethyl chitosan, adding organic solution of the o-nitro benzyl hemisuccinate activated by NHS and EDC.HCl according to the molar ration of sugar moiety of the carboxymethyl chitosan to the o-nitro benzyl hemisuccinate as 1 to (0.01 to 1), reacting for 6h in room temperature, then dialyzing and freeze drying to obtain photo-responsive carboxymethyl chitosan derivative, dispersing the derivative and pesticide into water at the same time and performing ultrasound at intervals to obtain photo-responsive controlled-release pesticide nanoparticle. The photo-responsive controlled-release nano-pesticide preparation can be selectively sprayed on the surfaces of or in target plants and pests under the condition free of illumination. Once the photo-responsive controlled-release nano-pesticide preparation is applied to the surfaces of or in the target plants and the pests, the photo-responsive controlled-release nano-pesticide preparation can respond external sunshine stimulation to release pesticide at any time.

The invention relates to a stable photo-responsive Pickering emulsion with photosensitive POSS hybrid particles as an emulsifying agent and a preparation method. Octa(gamma-chloropropyl) POSS serves as an initiator, an azobenzene-containing double-bond compound serves as a monomer, and the photosensitive POSS hybrid particles are prepared through the atom transfer radical polymerization (ATRP) method. The water-in-oil (W / O) type Pickering emulsion is obtained through shear field emulsification. The method is simple, feasible, high in operability and capable of being applied to the field of cosmetics. Through external stimuli, the emulsion is demulsified and release moisture of an internal phase so that skin can be moistened or prevented from being harmed by ultraviolet rays. The emulsion can also be applied to the field of drug sustained release, and through UV irradiation, controllable release of internal phase medicine is achieved. Accordingly, the emulsion can be widely used in the fields such as cosmetics, biology and pesticide delivery, and has very good application and popularization value.

The invention discloses a preparation method of a photo-responsive linear azobenzene polyoxyethylene ether nonionic surfactant, belonging to the technical fields of textile and chemical industry. The azobenzene polyoxyethylene ether nonionic surfactant is synthesized from 4-hydroxyazobenzene and polyethylene glycol. The azobenzene polyoxyethylene ether nonionic surfactant can be subjected to reversible heterogeneous treatment from an anti-form to a cis-form under the irradiation of ultraviolet light and visible light, and the tightness of the azobenzene polyoxyethylene ether nonionic surfactant arrayed on the surface of a foam liquid membrane is changed through steric hindrance, so that the effects of low concentration and high foam stabilizing property are achieved. The azobenzene polyoxyethylene ether nonionic surfactant can be used as a wetting permeating agent, a detergent and a low-concentration surfactant, so that the demand contradiction that foam has different stabilities before and after being dyed and finished is solved, the utilization rate of the foam can be increased, the foam can be effectively recycled, the pollution is alleviated, and the wasting of a chemical reagent is reduced.

The purpose of the present invention is to provide novel liquid crystalline compounds that are capable of inducing phase transition by a light stimulus and are useful in the display, optoelectronics, and photonics field. The present invention relates to the liquid crystalline compounds represented by general formula (1):wherein R1, R2 and R3 are independently selected from the group consisting of hydrogen, alkyl, alkoxyl, alkoxycarbonyl, alkoxycarbonyloxy, alkanoyl, alkanoyloxy, alkoxyphenyl, and N-alkylaminocarbonyl, and n is an integer.

The invention relates to a photo-responsive titania nanotube-supported catalyst electrode and a preparation method thereof, and belongs to a catalytic electrode material and preparation thereof in a fuel cell. A titania nanotube is adopted as a catalyst carrier of at least one noble metal in platinum, palladium, gold and silver; a photo-responsive semiconductor electrode is obtained by graphene modification, so that, on one hand, a titania nanotube array has good acidic and basic stability and excellent photoelectric property, and on the other hand, the electrical conductivity and the visible light response performance of the semiconductor electrode are enhanced by modification on the titania nanotube by graphene. By the preparation method provided by the invention, the dispersity of the catalyst and the visible light response of the electrode can be improved by the catalyst electrode, so that the catalysis efficiency of the noble metal catalyst is improved.

A photo-responsive delivery system useful to deliver a compound to a target site is provided. The system includes a physiologically compatible matrix crosslinked with a photo-responsive matrix cross-linking agent. A method of making the delivery system and a method of delivering a compound to a target site using the system are also provided.

Disclosed are anticorrosive photo-responsive and self-healing shape-memory polyurethane coating and a preparation method thereof. The preparation method includes: adding a filling material into polycaprolactone, adding stannous octoate, reacting for 24-36 hours at a temperature of 130-140 DEG C, adding a solvent, a crosslinking agent and dibutyltin dilaurate, stirring for 5-10 hours at a temperature of 60-80 DEG C under protection of nitrogen, coating on metal surfaces, and curing. The polycaprolactone is adopted as a substrate, a photothermal conversion material is introduced into a polymer network by an in-situ polymerization method, catalyst and the crosslinking agent are introduced, and the polymer network is formed by a crosslinking action to prepare the shape-memory polyurethane coating capable of healing automatically. Under illumination of infrared lights, an interior of the coating can be heated up to 130-140 DEG C rapidly through photothermal conversion, shape memory restoreis stimulated by high temperature, crack surfaces are enabled to contact, polymer chain segments exercise strenuously to stride damaged areas along with cracking and reconstructing of ammonia ester bonds, and accordingly a self-healing function of the coating is realized.

Photoactivatable prepolymers and methods of use thereof are disclosed for microencapsulation of a substantially water-insoluble material within a nonporous shell. As provided herein, the microencapsulated material is released with no more than a slow release rate. Upon exposure of the nonporous shell to light, the nonporous shell is converted into a porous shell having an increased release rate for the microencapsulated material.

The invention relates to a photo-responsive micro valve based on a micro-fluidic chip and a production method thereof. Microstructures and micro-channels are arranged on the surface of the micro-fluidic chip, a hydrophilic / dehydrophilic gate controlled switch is arranged on a main micro-channel, the surfaces of the micro-channels are modified through photo-responsive molecules, reversible changes of surface appearance and chemical construction of the micro-channels cause changes of surface invasion under stimulation of visible lights, movement of micro-fluid on the surfaces of the micro-channels is controlled, and therefore the intelligent micro valve achieves control on micro-fluid flowing. The photo-responsive micro valve is mainly applied to the related fields such as electrophoretic separation, chromatographic separation and immunoassay, achieves intelligent driving and control on micro-fluid, greatly reduces micro-fluid driving and control cost, has the advantages of being portable, economical, fast and efficient, and is a novel analysis technique for micro-fluid driving and control.

The invention relates to a tuneable phase shifter and / or attenuator comprising a waveguide having a channel and a piece of photo-responsive material (18) disposed within the waveguide along an internal wall of said channel, a light source disposed outside the waveguide to emit light through an aperture (30) of said internal wall to impinge on at least part of an outside surface of said piece of photo-responsive material (18).

A system comprises an electro-wetting subsystem, a transfer subsystem, an imaging member, and an inking subsystem. The electro-wetting subsystem comprises a photo-responsive photoreceptor, a charging mechanism, an image definition material reservoir, a charge erase mechanism, and an exposure subsystem, such as a light source and rotating polygon forming a raster output scanner (ROS) disposed for exposure of the photoreceptor through the image definition material reservoir. The imaging member comprises a reimageable surface having certain properties, such as having a low surface energy to promote ink release onto a substrate. In operation, the photoreceptor is charged areawise. An exposure pattern is formed by the exposure subsystem on the surface of the charged photoreceptor, which is developed with image definition material. The image definition material pattern is transferred to the reimageable surface. The pattern is developed with ink. The inked image may be transferred to a substrate.

The invention discloses a cyano-distyrene-containing photo-responsive luminescent liquid crystal elastomer material and a preparation method thereof. The liquid crystal elastomer material disclosed bythe invention is prepared by performing copolymerization on a cyano-distyrene group-containing monomer and a hydrogen bond crosslinking agent monomer, or performing copolymerization on the cyano-distyrene group-containing monomer, the hydrogen bond crosslinking agent monomer and a monomer containing a non-liquid crystal structural unit. The liquid crystal elastomer material disclosed by the invention shows a typical aggregation-induced fluorescence enhancement effect, can emit very strong fluorescent light in an aggregation state; in addition, the orientated single domain liquid crystal elastomer fibre also has photo-response; under the irradiation of ultraviolet light, the single domain liquid crystal elastomer fibre can deform, has the advantages that the deformation degree is high, thedeformation speed is high, the deformation can be stored for a long time and the like, and shows a broad application prospect in the fields of intelligent actuators, biomaterials, optical materials and the like.

The invention discloses a co-delivery system of a photo-responsive chemotherapeutic drug and a preparation method thereof. A prodrug is prepared through covalent linkage of a double branched type photosensitive carrier with o-nitrobenzyl as a structural unit and an antineoplastic drug with different mechanism of action to form the co-delivery system of the photo-responsive chemotherapeutic drug. The co-delivery system of the photo-responsive chemotherapeutic drug has the beneficial effects that the advantages of excellent controllability of exogenous excitation photons and multidrug resistance (MDR) effect of combined chemotherapy capable of effectively inhibiting tumors in tumor therapy are combined; and the controllable release of different drugs is realized by changing parameters of excitation light so as to solve the technical problem of intelligent drug release in the co-delivery systems of traditional drugs; and the co-delivery system can be applied to tumor treatment.

The present invention relates to a method for manufacturing a photo-responsive cross-linked liquid-crystalline polymer film, containing: a process of preparing a photopolymerizable monomer solution by dissolving in a solvent a polyfunctional liquid-crystalline monomer, a monofunctional liquid-crystalline monomer, a polyfunctional photo-responsive monomer and a photopolymerization initiator; a process of forming a photopolymerizable coating by applying the photopolymerizable monomer solution to a surface of an alignment film by means of a wet coating method and performing removal of the solvent; and a process of forming a film by photopolymerizing the monomers through light irradiation of the photopolymerizable coating under a non-oxygen atmosphere.

Disclosed are photonic crystals containing photoresponsive molecules and a method of preparing the same. More particularly, it is possible to synthesize photonic crystals containing photoresponsive molecules that induce photoalignment of azobenzene by ultraviolet irradiation using bent-shaped liquid crystal molecules containing azobenzene, which causes photo-isomerization upon ultraviolet irradiation, form a periodic structure in a visible light region using a self-assembly phenomenon occurring as temperature decreases, realize a reflection color and enable reversible pattering.

The invention provides a photo-responsive random copolymer and a preparation method thereof and relates to a random copolymer. The photo-responsive random copolymer is prepared by PEGMA and 4-oxyazobenzene-methacrylate. The preparation method comprises the steps that 4-hydroxyl azobenzene, TEA and THF are mixed to obtain a mixed solution A, cooling is performed to reach 0-5 DEG C, and methylacryloyl chloride dissolved in the THF is added to the mixed solution A; filtration is performed after reaction, the filtrate is collected and is dissolved in methylene chloride after rotary evaporation, anhydrous magnesium sulfate is added after washing for drying and filtering, the filtrate passes through a column after rotary evaporation to obtain a 4-oxyazobenzene-methacrylate monomer, then a PEGMA monomer, a CDB chain transfer agent, an initiator AIBN and the THF are added, and polymerization reaction is performed under argon gas protection and stirring after freezing, thawing and degassing and is terminated through liquid nitrogen quenching; the reaction mixture liquid is subjected to precipitation with n-hexane and dialysis with distilled water to obtain dark red viscous liquid, and suction filter is performed to obtain the photo-responsive random copolymer.

Provided is a method of fabricating an organic light emitting device using a solution process. The method includes forming an electrode on a lower substrate; depositing an organic active material solution containing at least one photoreactive material on the electrode to form an organic active material layer; and radiating light onto the organic active material layer so that a characteristic of the light varies according to the depth of the organic active material layer in order to gradually vary a molecular orientation structure in the organic active material layer according to the depths, thereby resulting in a carrier mobility gradient according to the depths of the organic active material layer.

The invention discloses a light-control nano-particle assembly and a preparation method and application thereof, and belongs to the field of drug controlled release. The light-control nano-particle assembly contains nano-particles and a photo-responsive polymer, wherein the photo-responsive polymer is grafted on the surface of the nano-particles through coordination, interaction of subject and object or a covalent bond. A photo-responsive group is connected to a main chain or a side chain of the polymer. The light-control nano-particles and drug molecules are self-assembled to form the light-control nano-particle assembly for coating the drug molecules. In an illumination condition, photo-responsive molecules on the polymer chain are changed, so that a structure of the polymer chain is changed, and the nano-particle assembly is disassembled, therefore the drug molecules coated by the assembly are released, and light-control drug release is realized.

The invention provides a photo-responsive gel electrolyte and a preparation method and application thereof. The photo-responsive gel electrolyte comprises an electrolyte solution and further comprises an azobenzene / polymer matrix mixture, wherein the azobenzene / polymer matrix mixture is prepared by mixing azobenzene and a polymer matrix together. According to the photo-responsive gel electrolyte disclosed by the invention, azobenzene is introduced in the polymer matrix and used to absorb light entering the electrolyte through a photo-anode, and then the azobenzene generates isomerism to drive the movement of the chain segment of the polymer, so as to promote migration of ions in the polymer matrix, further achieve the aim of improving the ionic conductivity of the electrolyte and enhance the photo-electro conversation rate of a dye-sensitized solar cell.

The present invention relates to a photo-responsive layer and layer assembly which can be used for controlling a flow of liquid for example in a water-purification device. The photo-responsive layer according to the invention comprises a first domain comprising a first material comprising molecules having a photo-responsive moiety, wherein the first domain of the photo-responsive layer is capable of undergoing a reversible geometrical change when said photo-responsive moiety is exposed to photo-activating illumination, such as UV-radiation. The photo-responsive layer is useful in UV controlled membranes e.g. for water purification.