50results about How to "Photoresponsive" patented technology

A process for preparing TiO2 film at room temperature includes such steps as evaporating metal titanium on electrically conductive substrate by vacuum sputter method and electrochemically oxidizing it. The resultant film has nano-class minipore structure and can generate photocurrent and photovoltage. After it is sensitised by dye, it can be used for solid-state or liquid-state solar battery.

The invention discloses a cyclic azobenzene amphiphilic segmented copolymer and its preparation method. The preparation method is concretely characterized in that the cyclic azobenzene amphiphilic segmented copolymer with controllable molecular weight, molecular weight distribution and ratio of a hydrophilic segment to a hydrophobic segment is obtained by combining through controllable atom transfer radical polymerization (ATRP) and an efficient CuAAC reaction. Compared with linear polymers having a same molecular weight, the cyclic polymer disclosed in the invention has the advantages of high Tg, fast photo-isomerization, sensitive light and pH response performances in an alkaline medium, and wide application potential in medicine release, surfactants, coatings, adhesives and separation films.

The invention discloses a totally-inorganic halide perovskite material CsPbI3 nanotube, and a preparation method and application thereof. The CsPbI3 nanotube is obtained by a CsPbI3 nanocrystal solution through a microwave reaction; and the molar ratio of Cs to Pb to I in the CsPbI3 nanotube is 1:(1-1.1):(3-3.3). According to the invention, the CsPbI3 nanotube prepared by a microwave method is a brand-new material, and through the method, the nanotube is prepared from perovskite for the first time. The totally-inorganic halide perovskite material CsPbI3 nanotube prepared by the method has fluorescent and photoelectric response, a high synthetic yield, uniform morphology, and high stability; the preparation method is simple and convenient, raw material sources are wide, the costs are low, heating is rapid by adopting the microwave method, and heating is uniform; and the CsPbI3 nanotube has a unique form, structure and electronic property, thus the CsPbI3 nanotube has huge application potentiality in fields such as photoelectrons.

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 preparation method of a photoresponse adhesive with strong adhesion under water, and relates to the technical field of polymer materials, and the preparation method comprisesthe following steps: (1) mixing an epoxy tea oil monomer, a thymine acrylate monomer and an adenine acrylate monomer, dissolving with a solvent, and then adding a polymerization initiator; and (2) removing oxygen by freezing and thawing circulation, introducing nitrogen, reacting at 75 DEG C for 2 hours, and purifying to obtain the photoresponse underwater adhesive. The invention also provides the photoresponse adhesive prepared by the preparation method. The preparation method has the beneficial effects that a one-pot method is adopted to introduce hydrogen-bond interaction between nuclear basic groups, on the basis that the preparation method is simple, the prepared adhesive has more excellent adhesion performance, biocompatibility and hydrophobicity, the adhesion performance is greatlyimproved, and the adhesive can be applied to vegetable oil-based underwater adhesives, the shearing strength of the adhesive is changed by adjusting the water temperature. And meanwhile, the adhesiveprepared by the invention has photoresponsiveness.

The invention discloses a dual-response type virus molecularly imprinted sensor based on magnetism and photons, and a construction method thereof. The dual-response type virus molecularly imprinted sensor based on magnetism and photons takes magnetic particles as an inner core, the surfaces of the magnetic particles are coated with silicon dioxide, a metal organic framework is grafted to the silicon dioxide, the metal organic framework is connected with a photoresponse polymer, and the photoresponse polymer is connected with a target virus template. The dual-response type virus molecular imprinting sensor based on magnetism and photons has a good binding behavior on a template virus, and is fast in binding kinetics, high in adsorption capacity and good in selectivity.

The invention discloses a hollow cerium dioxide microsphere supported ferrihydrite heterogeneous Fenton-like catalyst and a preparation method and application thereof. The preparation method of the hollow cerium dioxide microsphere supported ferrierite heterogeneous Fenton-like catalyst comprises the following steps: firstly, preparing porous cerium dioxide nanospheres by using Saccharomyces cerevisiae as a biological template in a high-temperature environment; and then, loading the porous cerium dioxide nanospheres on the surface of ferrierite by in-situ deposition. The mesoporous ceria nanospheres in the catalyst have a photosensitive effect, can generate photo-generated carriers in response to visible light, and promote the activation efficiency of the ferrihydrite on hydrogen peroxide in a Fenton system. Generated active free groups have broad-spectrum catalytic degradation effect on pollutants and have certain practical application value.

The invention relates to a photosensitive porous polymer film and a preparation method of the film and belongs to the field of functional composites. The photosensitive porous polymer film comprises the following ingredients in parts by weight: 70-95 parts of polymer, and 5-30 parts of polyurethane/modified carbon nano tube compound, wherein a mass percentage of a modified carbon nano tube in the polyurethane/modified carbon nano tube compound is 0.1-5%; the modified carbon nano tube refers to a sulfonated carbon nano tube that is subjected to oxidation treatment, rexanthation treatment and final reduction treatment; and the polymer is polyethene or polypropylene. The photosensitive porous polymer film has very good photoresponse, and air permeability of the film can be changed by adjusting a content of a dispersion phase.

The invention provides a photochromic hyperbranched azopolyamide and a preparation method thereof. The method includes: taking 4, 4'-azodianiline and trimesic acid as the raw materials, firstly converting trimesic acid into trimesoyl chloride, and then utilizing the reaction activity of acyl chloride group and amino to synthesize hyperbranched azopolyamide by low temperature solution polycondensation. The photochromic hyperbranched azopolyamide has the optical activity of azo group, and also has good thermodynamic stability and excellent processability of polyamide substances, and a UV-Vis spectrum is employed to study the photoisomerization characteristics and photo-trans-cis isomerization kinetics of the synthesized azo polymer.

The invention discloses a stretchable photoresponse liquid crystal light scattering display screen and a manufacturing method thereof. The stretchable photoresponse liquid crystal light scattering display screen is manufactured by coating azobenzene-containing liquid crystal physical gel on the surface of a stretchable membrane and then covering another stretchable membrane on the surface of the azobenzene-containing liquid crystal physical gel. The azobenzene-containing liquid crystal physical gel comprises the following components by weight percent: 89.7-98.9% of liquid crystal matrix compound, 1-8.7% of azobenzene compound and 0.1-1.6% of gelator, and the stretchable membrane is a polyurethane membrane or a PDMS membrane. The stretchable photoresponse liquid crystal light scattering display screen disclosed by the invention is simple in manufacturing process, has photoresponse, long stability time under visible light, good tensile property, and good anti-fatigue performance, can be repeatedly used, and has the characteristics of wide view, high luminance and high image contrast.

The invention discloses a polymer photonic crystal microsphere, and a preparation method and application thereof. The preparation method particularly comprises the steps of firstly taking a PS-b-P2VP solution as a dispersion phase of a micro-fluidic system, taking a PVA (Poly Vinyl Alcohol) solution as a continuous phase of the micro-fluidic system, taking a micro-fluidic chip with a special structure to obtain polymer emulsion drops which are good in dispersity and uniform in size, and then volatilizing the solvent in the drops to obtain a polymer microsphere; then, taking a CTAB (Cetyl Trimethyl Ammonium Bromide) solution as annealing external environment to carry out annealing treatment on the polymer microsphere; and finally obtaining a block polymer photonic crystal microsphere. In the invention, the polymer photonic crystal microsphere has a sequential stratified structure, has organic solvent responsiveness, pH value responsiveness and ion species responsiveness, and can effectively solve the problems that a current photonic crystal is long in preparation period, tedious in process, complex in system, single in responsiveness and large in angle dependence.

The invention discloses amphipathic alginate with response to light and a pH and stable pickering emulsion thereof. The emulsion is prepared from an oil phase and a water phase, stabilizers of the emulsion are nano-silica, the host molecules alginate (Alg-beta-CD) and guest molecules Azo-PEG, a volume ratio of the oil phase to the water phase is 1 to (0.1 to 10), the concentration of the silica dispersed in the water phase is 2wt%, the concentration of the (Alg-beta-CD) dispersed in the water phase is 1 g/L, and the concentration of the Azo-PEG dispersed in the water phase is 2 g/L. The pickering emulsion is high in stability, and has pH responsiveness and light responsiveness, by adjusting the pH or illumination, controllable release of an internal phase medicine can be achieved, and meanwhile, a preparation method is simple in operation process, and has large preparation throughput so that scale-up production of the emulsion can be achieved more easily, and the emulsion has wide application in the fields of make-up, biology, pesticide drug delivery and the like, and very good application and popularization values.

The invention belongs to the field of functional composite materials and relates to a photo-induced reversible macromolecular shrink film and a preparation method thereof. The photo-induced reversible macromolecular shrink film is prepared from, by weight, 70-95 parts of a polymer and 5-30 parts of a polyurethane/modified carbon nanotube composite, wherein the mass fraction of modified carbon nanotubes in the polyurethane/modified carbon nanotube composite is 0.2%-5%, the modified carbon nanotubes refer to sulfonated carbon nanotubes obtained by subjecting carbon nanotubes to oxidation, sulfonation and reducing treatment, and the polymer refers to polyethylene or polypropylene. The photo-induced reversible macromolecular shrink film has a photo-responsive property and is capable of shrinking by 70% or above through infrared illumination.

The invention belongs to the technical field of a non-viral gene vector and a medicine/photosencitizer vector, and particularly relates to a multifunctional nanometer vector and a preparation method of the multifunctional nanometer vector, wherein the multifunctional nanometer vector is built by using silicon oxide nanometer particles as substrates, functionalizing the silicon oxide nanometer particles through surface modification, introducing photosensitive groups with ultraviolet/near infrared light response and using an ATRP (Atom Transfer Radical Polymerization) method. The multifunctionalnanometer vector has higher transfection efficiency than international JINBIAO PEI in cells of HepG2, COS7, 293, C6, Hela and the like, and has photoresponse gene release performance. Under the photostimulation, the photosensitive groups on the surfaces of the silicon oxide nanometer particles perform photolysis, so that positive ions fall off, and the genes are released; and the gene transfection efficiency can be greatly improved. Various different medicine or photosencitizer molecules can be loaded into porous structures of mesoporous silicon oxide nanometer particles; and good experimentfoundation is laid for the development of the novel photoresponse nanometer vector. The method has the advantages that the use method is simple; and the commercialization potential is realized.

The invention belongs to the field of catalytic reaction engineering, and particularly relates to synthetic glucoside containing an azobenzene group, and application of the glucoside serving as an ultraviolet controlled-release material. The glucoside containing an azobenzene group has a structure as shown in Formula (I). The glucoside containing an azobenzene group can be used for preparation of ultraviolet sensitive liposome, and has favorable structural stability, biological targeting property, biocompatibility and in-vivo degradability.

The present invention belongs to the technical field of photodetection, and particularly relates to a photodetector. The photodetector comprises a metal In point electrode, a metal Pd front electrode,a SnSe thin film layer, a Si single crystal substrate and a metal In back electrode arranged in the order from top to bottom. The SnSe thin film layer is prepared by using a magnetron sputtering method. The test results show that the prepared thin film device presents good self-driven photodetection performance and has the advantages of stable performance and the like.

The invention discloses a photosensitive chromatographic stationary phase based on silicon substrate modified by an azobenzene photosensitive compound. The azobenzene photosensitive compound, sodium hydride and allyl bromide are added into N,N-dimethylformamide for reaction for 12-24 hours at 60-80 DEG C; extraction and crystallization at low temperature are carried out to obtain an intermediate product; the intermediate product, triethoxysilane and platinum (0)-1,3- divinyl-1,1,3,3-tetramethyldisiloxane are added to toluene for reaction at 70-80 DEG C for 12-24 hours; after the reaction, a solvent is removed, separation and purification are carried out, and the silanized azobenzene photosensitive compound is obtained; the silanized azobenzene photosensitive compound with a weight ratio of(1-2):25 and the silicon substrate with hydroxyl on the surface of the silicon substrate are added into toluene for reaction at 60-80 DEG C for 12-24 hours; and centrifugation, washing and drying arecarried out to obtain the photosensitive chromatographic stationary phase. The photosensitive chromatographic stationary phase has the beneficial effects that reversible adjustment and control in situ can be achieved; and the preparation method is simple, the operation is easy, the cost is low, and universality is achieved.

The invention discloses photoresponse oil-water separation filter paper and a preparation method thereof. The preparation method comprises the following steps: using a dip-coating method, dipping filter paper in solution uniformly mixed with nano silicon dioxide particles, a photoresponse polymer, a curing agent and an organic solvent, dispersing by ultrasonic wave, taking and naturally airing or drying in vacuum, preparing the photoresponse oil-water separation filter paper. The provided preparation method is simple, the cost is low, and the stability is good. The prepared filter paper has the photoresponse performance, is capable of selectively performing the oil-water separation, and has good separation effect to different oil-water mixtures, and extensive application prospect.

The invention provides a spiropyran derivative, a photochromic material and a preparation method of the photochromic material. The photochromic material includes a host material and a guest material. The host material is a high-molecular polymer, and the guest material is the spiropyran derivative. The preparation method comprises the steps: dissolving the host material and the guest material in a solvent, and then removing the solvent to obtain the photochromic material. The photochromic material disclosed by the invention has the characteristic of long-life luminescence, and can be applied to the aspects of photoelectric devices, display materials, information storage materials or anti-counterfeiting materials and the like. In addition, interference of nanosecond-level short-service-life background fluorescence can be avoided during biological imaging experiment detection, so that the detection accuracy is improved.

The invention relates to light-response intelligent foam formed through dehydroabietic acid surfactant containing azobenzene. The molecular structural formula of the surfactant (R-azo-Na) is as shown in the description. The invention discloses a synthesis method of the dehydroabietic acid surfactant (R-azo-Na) containing azobenzene. R-azo-Na surfactant molecules are of a rigid structure as a whole and have good water solubility. R-azo-Na has good foam stabilizing performance, and the half-life period of the formed foam is 1300 min. The half-life period of the foam becomes 6.5 min after the foam is irradiated by ultraviolet light with the wavelength being 355 nm. It is indicated that the foam has very efficient light-response performance.

The invention belongs to the technical field of optical detection, and particularly relates to a self-driven photoelectric detector. The detector sequentially comprises a metal In point electrode, a metal Pd front electrode, an In2S3 nanosheet film layer, a Si single crystal substrate and a metal In back electrode from top to bottom. The In2S3 nanosheet film layer is prepared by a hydrothermal method, an argon annealing treatment method and the like. Test results show that the prepared thin film device shows good self-driven optical detection performance and has the advantages of stable performance and the like.

The invention relates to a preparation method of an infrared response shape memory polymer capable of accurate recovery, and belongs to the field of functional composite materials. The invention provides a photo-induced shape memory composite material, the composite material includes a polymer matrix, a polymer elastomer dispersed phase and photothermal particles, wherein the photothermal particles are distributed in the polymer elastomer dispersed phase, and the dispersed phase distribution In the matrix; the disperse phase of the photoinduced shape memory composite material acts as a stress concentration point during deformation, so that it can form a porous structure that enables the composite material to function as a photoinduced shape memory composite material. The memory material obtained by the invention has good photoresponsivity, can be recovered by infrared light, and has excellent recovery accuracy and integrity, and this property has a high repetition rate.

The invention belongs to the technical field of optical detection, and particularly relates to a self-driven photoelectric detector which sequentially comprises a metal In point electrode, a metal Pd front electrode, a bismuth oxyselenide film layer and a silicon single crystal substrate from top to bottom. The bismuth oxyselenide thin film layer is prepared through a spin-coating method, air annealing treatment, chemical vapor deposition, wet transfer and the like. Test results show that the photoresponse performance of the bismuth oxyselenide-based device is greatly improved by constructing the heterojunction, and the device shows good self-driven photodetection performance.

The invention relates to a quantum dot mid-infrared photoelectric detector and a preparation method thereof. The preparation method comprises the following steps: growing an indium gallium zinc oxide conducting channel layer on a silicon/silicon dioxide substrate; preparing a source electrode and a drain electrode on the surface of the indium gallium zinc oxide conductive channel layer; performing patterning on the indium gallium zinc oxide conductive channel layer; preparing single crystal tin telluride colloidal quantum dots by using a thermal injection method; spin-coating the surface of the patterned indium gallium zinc oxide conductive channel layer with the single crystal tin telluride colloid quantum dots to obtain an initial device; and annealing the initial device to obtain the quantum dot mid-infrared photoelectric detector. The quantum dot mid-infrared photoelectric detector prepared by the method can solve the non-toxic problem of the mid-infrared quantum dot material and the problem of widening the response wave band of the quantum dot detector.

The invention relates to a light-responsive and anti-freezing elastic gel fiber and a preparation method thereof. The light-responsive and anti-freezing elastic gel fiber is prepared from 0.01-1 partof ferrous chloride, 0.005-2.5 parts of citric acid, 0.1-3 parts of an acrylamide-sodium acrylate random copolymer and 1-10 parts of a solvent. The prepared elastic gel fiber has the advantages of flexible stretchability, light response, adjustable modulus, freeze resistance, a simple preparation method and the like, and therefore the prepared elastic gel fiber has the potential for large-scale preparation and broad application prospects.