43results about How to "Good light-to-heat conversion effect" patented technology

The invention provides a method for simultaneously preparing porous gold nano particles and hexagonal gold nano sheets. The method comprises the following steps that poloxamer (F127) is added in ultrapure water, ultrasonic dispersion is conducted, and a transparent and clear micellar solution is formed; a chloroauric acid solution is added in the micellar solution, uniform stirring and mixing areconducted, a reaction precursor solution is formed, and obtained solid particles are the porous gold nano particles; and an ascorbic acid solution is used for reducing of the precursor solution, afterthe reaction is complete, centrifugal separation is conducted, washing is conducted, and the hexagonal gold nano sheets are obtained. The method has the advantages that operation is simple and convenient, experiment conditions are moderate, and experiment reagents are environment-friendly; the prepared porous gold nano particles have the large specific surface area and can be applied to the fieldof catalysis and medicine carrying; and the regular hexagon gold nano sheets have good absorption performance for near-infrared light and can be widely applied to the fields of nano devices, biomedicine, molecular recognition, photo-thermal therapy and the like.

The invention provides a preparation method of a graphene-based photothermal conversion material. The preparation method of the graphene-based photothermal conversion material comprises performing hydrothermal reaction, solvothermal reaction and mixed solvothermal reaction on a single-layer graphene oxide dispersion; removing water and organic solvent, and performing high-temperature calcination and ozone treatment to obtain the graphene-based photothermal conversion material. The invention also provides the graphene-based photothermal conversion material prepared through the method and application thereof. The graphene-based photothermal conversion material can be applied to various photothermal conversion devices.

The invention relates to Fe-based metal organic skeleton nanoparticles with a function of near-infrared absorption, and a preparation method of the Fe-based metal organic skeleton nanoparticles. The obtained Fe-based metal organic skeleton nanoparticles are characterized in that the nanoparticles belong to a porous structure material which is uniform in size and adjustable in scale and morphology and has larger specific surface area, remarkable near infrared absorption characteristic and good photothermal conversion effect. The preparation method comprises the steps of (1) sequentially adding a certain amount of a polyvinylpyrrolidone water solution and a certain amount of a hydrochloric acid solution into a potassium ferricyanide water solution under the stirring condition; (2) after 30min, placing a precursor solution obtained in the step (1) into a drying oven at the temperature of 40-100 DEG C for reacting for 24h; (3) carrying out high-speed centrifugal separation on a colloidal solution obtained in the step (2), and then carrying out ultrasonic cleaning to obtain the blue Fe-based metal organic skeleton nanoparticles. The obtained Fe-based metal organic skeleton nanoparticles have important potential application value in the aspects such as drug transport, diagnostic imaging, photothermal therapy and medicine controlled release.

The invention provides an assembling system for PEGMa modified MoOx and thermosensitive PNIPAM microgel and a preparation method thereof and relates to the assembling system for microgel and the preparation method thereof. The invention aims to solve the problems that the present photothermal conversion material is difficult to realize accurately controllable targeting release of the loaded drug and has toxic and side effects. The chemical formula of the system is PEGMa-MoOx/P(NIPAM-co-MAA). The method comprises the following steps: preparing PEGMa-MoOx and dissolving in deionized water; adding NIPAM, MAA, MBA and SDS and uniformly mixing; heating and introducing nitrogen; adding APS; and reacting and then centrifuging, washing, dialyzing and drying, thereby completing the preparation. The preparation method provided by the invention is simple and feasible, the cost is low, reaction conditions are mild, the operation is easy, the toxic and side effects are few, and the practicability is ultrahigh; the compound microgel can realize a targeting positioning function; and after a photo-thermal chemical treatment effect is achieved, the microgel can automatically degrade within 24h and can be discharged from the body.

The invention provides nanocapsules having a core-shell structure, the nanocapsules are composed of WS2 nanocapsules, the inner part of the WS2 nanocapsules is coated with the Fe3O4 nano particles, and the surface of the WS2 nanocapsules is synchronously modified with a polymer through covalent combination. The invention also provides a preparation method of the nanocapsules having the core-shellstructure, which comprises the following steps: the polymer, a sulfur source, a tungsten source and an iron source are dispersed in a solvent, and the materials are stirred and completely dissolved toobtain a mixed solution; the obtained solution is transferred to a stainless steel reaction vessel having a para-position polyphenyl inner liner for reacting for a certain time in a sealed mode, andthen centrifugation and washing are carried out to obtain the product which is the Fe3O4@WS2-polymer nanocapsules having good colloid stability with the inner part coated with the nano particles and the surface modified with the polymer. The invention also provides an application of the nanocapsules having the core-shell structure as a photo-thermal conversion material. The nanocapsules have highphoto-thermal conversion capability, and can be used in the fields of efficient cooperative diagnosis and treatment for tumor.

The invention relates to a method for preparing a paper-based folding actuator under stimulation of multiple physical fields. The method comprises the following steps: firstly, drawing the shape of the actuator by drawing a wax wall on cellulose paper; then, adding dropwise a conductive polymer PEDOT:PSS solution, and performing drying at room temperature with the help of an organic glass plate toprepare a PEDOT:PSS/cellulose paper-based composite; adding dropwise a Fe3O4 nanoparticle suspension onto the PEDOT:PSS/cellulose paper-based composite, performing drying at room temperature with thehelp of the organic glass plate, and taking down the paper-based composite to prepare a Fe3O4/PEDOT: PSS/cellulose paper-based composite; cutting the Fe3O4/PEDOT: PSS/cellulose paper-based compositealong a wax wall pattern according to design requirements of folding deformation, and pasting a transparent adhesive tape one side to prepare the flexible Fe3O4/PEDOT:PSS/cellulose paper-based composite folding actuator. The method is relatively simple, and reversibly recoverable actuating deformation response can be produced under simulation of wet-heat-light-electricity-magnetism physical fields.

The invention belongs to the technical field of photothermal conversion materials, and discloses an eggshell membrane/silver nanoparticle/graphene oxide composite biological membrane and a preparationmethod. A waste eggshell membrane is used as a carrier material, and silver nanoparticles with a photothermal conversion effect and graphene oxide are assembled together to prepare the biomass membrane with synergistically enhanced photothermal conversion performance. The preparation method comprises the following steps: preparing anisotropic silver nanoparticles with different LSPR properties bytaking silver nitrate as a precursor; loading the anisotropic silver nanoparticles onto the eggshell membrane by a self-assembly method; and loading graphene oxide nanosheets on the eggshell membranein an impregnation self-assembly manner. According to the technical scheme, the enhanced photothermal effect of the eggshell membrane loaded with the two functional nano materials is realized. The LSPR property of the silver nanoparticles can be effectively regulated and controlled through the morphology of the silver nanoparticles, and then the effective absorption and photothermal conversion ofthe eggshell membrane loaded with the silver nanoparticles on light energy of different wave bands are regulated and controlled.

The invention discloses a W18O49-tirapazamine composite nano-particle. The composite nano-particle adopts PEG-PCL as a carrier, and the internal of the PEG-PCL is loaded with W18O49 and tirapazamine;the W18O49 loading capacity is 2.99%, and the of and tirapazamine loading capacity is 1.29%; and the composite nano-particle is a dispersed spherical structure, and the particle size of the compositenano-particle is 60-100 nm. The composite nano-particle can improve the TPZ treatment effect.

The invention relates to ultra-small-size copper sulfide nano-particles as well as a preparation method and application of the ultra-small-size copper sulfide nano-particles. The copper sulfide nanoparticles are synthesized by adopting the copper ion-doped carbon quantum dots, and the synthesized copper ion-doped carbon quantum dots have more excellent photoresponse and electron transmission effects. The prepared ultra-small-size copper sulphide nano-particles overcome the obstruction of extremely poor water solubility in application of copper sulphide nano-materials, and can show good solubility and long-term stability when water is used as a solvent. The water-soluble stable ultra-small-size copper sulphide nanoparticles prepared by the preparation method disclosed by the invention show an excellent photothermal conversion effect under the irradiation of near-infrared laser, the preparation process is simple and rapid, and the requirements on instruments and equipment are relatively low.

The invention discloses a preparation method of a photo-thermal super-hydrophobic deicing coating. The preparation method comprises the following steps: 1, pretreating an aluminum sheet, namely polishing by using abrasive paper to remove a non-uniform oxide layer on the surface of the aluminum sheet; 2, dropwise adding the polytetrafluoroethylene suspension liquid into a beaker containing an amyl acetate solvent, and carrying out ultrasonic treatment for 5-10 minutes to uniformly mix the polytetrafluoroethylene suspension liquid and the amyl acetate solvent; the mass ratio of the polytetrafluoroethylene suspension to the amyl acetate is 1: (1-2); 3, sequentially adding Prussian blue and hydrophobic silicon dioxide into the beaker, and stirring for 6-24 hours to complete the preparation of a precursor solution; the content of the prussian blue and the content of the hydrophobic silicon dioxide are 1-5% of the total mass of the polytetrafluoroethylene suspension and the amyl acetate respectively; fourthly, the precursor solution is sprayed to the surface of the pretreated aluminum sheet, drying is conducted for 1 h at the temperature of 100-150 DEG C, the adhesive force between water drops or wet snow and ice and the surface is reduced through the extremely small dynamic rolling angle of the surface of the coating, and therefore the water drops or the ice can easily fall off under the action of external force such as self gravity or wind power, and accumulation of rain, snow and ice on the surface is delayed or even prevented.

The invention provides a graphene enhanced photo-thermal evaporation membrane, a membrane assembly and a sewage concentration treatment device. The graphene enhanced photo-thermal evaporation film is a hollow fiber film, graphene of a two-dimensional sheet structure is evenly distributed on the inner surface, the outer surface and the section of the photo-thermal evaporation film, the photo-thermal evaporation film is of a gradient ordered pore structure, the pore diameter of the photo-thermal evaporation film is decreased from the inner surface to the outer surface, and the average pore diameter of the photo-thermal evaporation film is less than 30 nm. Graphene with high strength, excellent hydrophobic property, photothermal conversion and heat-conducting property is used as a raw material, preparation of a photothermal modified material is realized through a one-step method, and a sewage concentration treatment device with high specific surface area and efficient photothermal conversion is designed, so that efficient solar energy driven photothermal evaporation concentration is realized.