650 results about "Photothermal effect" patented technology

The present disclosure concerns a means to use light manipulation in engineered or structured coatings for thermal or photothermal effects and/or refractive and reflective index management. Such metallic, nonmetallic, organic or inorganic metamaterials or nanostructures could be used to manipulate light or energy for thermal or photothermal effects and/or refractive and reflective index management on or in any material or substrate on or in any material or substrate. The light scattering properties of metallic particles and film can be used to tune such coatings, structures or films over a broad spectrum.

The present invention discloses an aqueous coating material capable of performing super-hydrophobicity repair through a photothermal method, wherein the material comprises, by mass, 10-95% of an aqueous matrix resin, 3-80% of a filler producing a micro-nano structure, 0.5-20% of polydopamine capsules with low surface energy substance covering, and 0.1-30% of a nanoparticle filler capable of producing a photothermal effect. The present invention further discloses a preparation method of the coating material. The coating of the present invention has super-hydrophobicity and super-hydrophobicity repair performance under near infrared light irradiation.

A combined catalyst and catalyst support comprising: a nanostructured solar selective support to which at least one catalyst is affixed; the catalyst comprising at least one material that activates chemical reactions that produce fuels; the nanostructured solar selective support comprising material that is highly absorbing over a portion of the solar spectrum and exhibits low emissivity toward thermal radiation and/or has a surface textured to lower emissivity; the combined catalyst and catalyst support exhibiting at least one of a photochemical effect and a photothermal effect; wherein these effects cause the chemical reaction rates to increase with exposure to an increasing number of incident photons within the solar spectrum.

The invention provides a gas detection method based on a hollow-core optical fiber photothermal effect. The method comprises the following steps: filling a fiber core of the hollow-core optical fiber with to-be-detected gas; inputting detection laser and periodically-modulated pumping laser into the hollow-core optical fiber; generating the photothermal excitation effect by the to-be-detected gas after the pumping laser is absorbed, and periodically modulating the laser phase; demodulating the phase modulation information of the detection laser to obtain the concentration of the to-be-detected gas, wherein the periodic modulation is the modulation of wavelength and/or density of the pumping laser. The pumping laser and the detection laser are used for detection, the method is simple and practical, an extremely-small spot area can be realized, the optical power density is greatly improved, and the photothermal signal strength is enhanced; the selective ppb-magnitude gas concentration measurement can be realized, and the method and the system are universally suitable for the gas capable of absorbing the light of near-infrared band.

Described herein are a device and a method for the treatment of varicose veins via laser radiation, and in particular using a holmium laser. The radiation of a laser source (5) is injected in a fiber (3) that can be inserted in the vessel to be treated. The laser source emits a radiation such as to cause a hyalinizing sclerosis with structural modifications both to the fibers of the collagen (shrinkage) and to the extracellular matrix of the median coat of the vein by the photothermal effect, substantially without thermal stress of the morphological component of the tunica media and of the tunica intima.

The invention relates to a photoresponse shape-memory self-repairing composite material and a preparation method, a repairing method and application thereof and belongs to the field of functional polymer materials. Polydopamine is compounded into a polymer material matrix with shape-memory self-repairing property, and can be applied to the fields such as a protective coating, a self-repairing device, a light driver and photothermal therapy. According to the specific method, the polydopamine has an excellent photothermal effect, and is capable of effectively absorbing light from a near-infrared light band to a visible light band, and the polymer matrix can be quickly heated by introducing a little of polydopamine, so that a characteristic temperature of shape memory or a reversible transition temperature of a dynamic key is achieved, thereby providing a simple, effective, fixed-point and quantitative energy supply for repairing of the material.

The invention discloses a nano-drug carrier with the magnetothermal and photothermal effects. The particle size is 50 nanometers to 300 nanometers, and the nano-drug carrier is prepared from mesoporous silica particles, Fe3O4 nanoparticles embedded into the mesoporous silica particles and graphene oxide with which the surfaces of the mesoporous silica particles are coated. The invention further provides a preparation method of the nano-drug carrier. The superparamagnetic Fe3O4 nanoparticles are prepared through a solvothermal method, the Fe3O4 nanoparticles are composited by taking hexadecyl trimethyl ammonium bromide as a structure-directing agent and taking tetraethoxysilane as a silicon source through the sol-gel self-assembling process, and then magnetic mesoporous nanoparticles Fe3O4/mSiO2 with the magnetic property adjustable and controllable are prepared; the surfaces of the Fe3O4/mSiO2 mesoporous nanoparticles are coated with graphene through the ion interaction or electrostatic interaction or hydrogen-bond interaction, and then the nano-drug carrier which both can efficiently deliver anti-cancer drugs and has the magnetothermal and photothermal effects is obtained. Accordingly, cancer treatment in which medical chemotherapy cooperates with magnetothermal and photothermal treatment can be achieved.

The invention relates to a drug-loading micro-needle promoted and controlled by a nanogold photo-thermal effect. The drug-loading micro-needle is composed of three components including gold nanoparticles, a photosensitizer wrapped by a lipidosome and a soluble micro-needle substrate material, wherein the mass concentration ratio of the three components in the micro-needle is 1:(1-50):(1-100). By utilizing the nanogold photo-thermal effect, the photo-thermal effect is generated by stimulating nanogold mixed in the micro-needle, so that decomposition of the micro-needle is promoted; therefore, rapid and controllable release of drugs are realized; when nanogold and the drugs enter skin tissue, the skin tissue permeability can be continuously increased through the nanogold photo-thermal effect, so that the drugs can be well delivered into deep tissue. The drug-loading micro-needle disclosed by the invention is a medical application research by combining an optical technology with a micro and nano technology in the field of biomedical engineering; in particular for a micro-needle system loaded with photosensitizer drugs, in the event of monitoring the photosensitization in tissue in real time, individual photodynamic therapy based on individual differences of patients can be realized through control of drug release by nanogold.

This invention relates to a device and a method for monitoring and optimizing photothermal therapy, using a high-power continuous-wave laser beam and a pulsed laser beam, both transmitted through a single soft, multi-mode optical fiber with a diffuse active tip, to interstitially irradiate the target tissue at the same time. The continuous-wave laser light induces photothermal effect and increases tissue temperature and the pulsed laser light produces a photoacoustic signal. The photoacoustic signal intensity is used to monitor the temperature changes in the target tissue and to guide the irradiation of the high-power laser to optimize the photothermal effect by adjusting the light intensity and irradiation time.

The invention discloses an ultra-small metal chalcogenide compound nano crystal and a biological synthesis method and application thereof. In one embodiment, the synthesis method is as follows: a protein with the isoelectric point PI lower than 9.0 and a metal salt are mixed with water evenly to form a mixed solution, the mixed solution is adjusted to alkaline, a reducing agent and a sulfur source are added for reaction to form the ultra-small metal chalcogenide compound nano crystal with the particle size less than 10nm. The method has the characteristics of mild reaction conditions, simple operation, direct use of particles without additional surface modification in biological photothermal therapy, and the like, the prepared ultra-small metal chalcogenide compound nano crystal is uniform in size, good in dispersion and high in stability, and the prepared ultra-small metal chalcogenide compound nano crystal has very good bio-compatibility without any surface modification, also has the photothermal effect, and is a great-application-prospect nano material used for photothermal therapy and biological fluorescence imaging.

The invention discloses an ultraviolet light-triggered croslinking near-infrared molecular probe as well as a preparation method and application of the molecular probe. Particularly, the preparation method comprises the following steps: constructing and synthesizing a photo-crosslinking near-infrared molecular probe DACF; and causing the photo-crosslinking near-infrared molecular probe DACF to crosslink in cells under the triggering of ultraviolet light. The probe is irradiated by light with a specific wavelength to generate a Carbene intermediate with high activity and is bound with an intracellular biomolecule covalent bond, so that the intake of the probe in the cell is remarkably increased, the residence time is prolonged, and the long-term tracking of tumor cells can be realized. Meanwhile, the tumor cells can be well killed by virtue of the photothermal effect of the probe. According to the photo-crosslinking near-infrared molecular probe prepared by virtue of the preparation method, the accumulation amount of the probe in a living tumor can be effectively increased, the residence time can be effectively prolonged, the diagnosis and treatment integration of the tumor is realized, and the molecular probe has important scientific research values and economic values.

The invention discloses a manufacturing method of a three-dimensional minute metal structural additive. The manufacturing method at least comprises the following steps that a substrate is subjected tolaser radiation and electrolytic deposition treatment at the same time, and a three-dimensional minute metal structure is manufactured on the substrate in an additive mode; and at least one zone on the surface of the substrate contains a shielding layer. The method has the advantages that the precision of minute structure electrolytic deposition can be improved; the temperature of a part of electroforming liquid in an action zone is increased through a laser photothermal effect, and improvement of the efficiency of minute metal structure electrochemical deposition is facilitated; when the laser energy is large, the laser energy enables the deposited metal to be molten, fusion and coagulation of a metal material are achieved, and improvement of the compactness and the mechanical performance of the electrolytic deposited minute structure is facilitated.

The invention provides a nanometer drug-loading system as well as a preparation method and an application thereof. The nanometer drug-loading system comprises a drug-loading nano-micelle core, a poly-dopamine shell, and bortezomib connected to the poly-dopamine shell, wherein drug-loading nano-micelles are nano-micelles formed by encapsulating chemical anti-cancer drugs by polyethylene glycol-distearoyl phosphoethanolamine. The preparation method of the nanometer drug-loading system comprises the following steps: forming the drug-loading nano-micelles; forming the poly-dopamine shell outside the drug-loading nano-micelles; and connecting bortezomib to the poly-dopamine shell. The nanometer drug-loading system has the grain diameter smaller than 50nm, is high in stability, has a tumor enrichment effect, and realizes simultaneous delivery of bortezomib and other chemical anti-cancer drugs; poly-dopamine has a photothermal effect, can assist chemotherapeutic medicines in treatment, has the synergy of combined treatment of chemotherapy and thermal therapy, and therefore, the nanometer drug-loading system has a wide medical application prospect.

The invention discloses a super-hydrophobic anti-icing and deicing coating with a photothermal effect and a preparation method thereof. The preparation method comprises the following steps: preparing melanin nanoparticles with the photothermal effect from an ink bag; carrying out hydrophobization modification on SiO2 nano particles by using perfluorodecyl triethoxy silane, so as to prepare hydrophobic SiO2 nano particles; blending melanin nanoparticles and polydimethylsiloxane to prepare a spraying solution, and then spraying the spraying solution to a substrate to prepare the photo-thermal coating; finally, spraying the hydrophobic SiO2 nanoparticle dispersion liquid on the surface of the photo-thermal coating to obtain the super-hydrophobic anti-icing coating with the photo-thermal deicing performance. The coating shows excellent photo-thermal deicing performance and super-hydrophobic ice-resistant performance. The coating can be prepared by adopting a simple spraying method, and compared with a traditional preparation method and the traditional preparation method, the preparation process is simple, the method is easy to implement, the cost is low, and the coating is suitable for being popularized and used in the industry.

The invention discloses a method for manufacturing an application substrate through photo-thermal effect, which comprises the following steps: performing light excitation on nanoparticles, and then converting light energy supplied by irradiation light rays into heat energy to further form a structure through the generated heat energy by which the application substrate with a specific surface structure is generated.

The invention provides a preparation method of nanoparticles with a photothermal effect and an application thereof. The nanoparticles are prepared by the following steps: positively charged molecules such as chitosan and the like undergo a polymerization reaction triggered by the use of genipin in a reversed-phase microemulsion; the surface is PEG-modified to enhance biocompatibility; and finally, a photothermal conversion material is supported under the positive and negative charge effect. The obtained nanoparticles have remarkable photothermal effect, can be applied in photo-thermal therapy of tumor cells, and can kill tumor cells by strong photo-thermal killing capability and inhibit tumor growth.

The invention discloses a porphyrin derivative nano-composite preparation applied in photodynamic therapy and photothermal therapy of rheumatoid arthritis and an application thereof. The invention discloses an experimental method of a composite reagent of a water-soluble porphyrin derivative and a nano-material. The composite reagent has stable fluorescence characteristic and excellent biocompatibility. According to the composite reagent, drug release detection and tracing of an inflammation area can be realized, and enrichment in the inflammation area can be achieved through porphyrin molecule absorption of the nano-material. The experimental method provided by the invention is easy to implement, and has low toxicity and high specificity. The porphyrin derivative in the obtained composite reagent can undergo violet light excitation to generate singlet oxygen. The nanometer material in the composite reagent has excellent photothermal effect under the red light excitation condition. Drug enrichment and multi-model treatment by photodynamic therapy and photothermal therapy for inflammation disease can be realized, and the porphyrin derivative nano-composite preparation has wide medical clinical application value and prospect.

The invention discloses a nano-mesoporous granular drug carrier with the photothermal effect and a preparation method of the nano-mesoporous granular drug carrier, and solves the problems of single treatment method, large toxic and/or side effects, poor effect and the like in the prior art. The preparation method is characterized by comprising the following steps: preparing mesoporous silica nano particles with adjustable particle size and aperture from a surfactant serving as a structure-directing agent and tetraethoxysilane serving as a silicon source through a sol-gel self-assembling process; through modification with an amino functional group, storing a large content of anti-cancer drugs in mesoporous channels of the mesoporous silica nano particles; adsorbing graphene quantum dots on the surfaces of the mesoporous silica nano particles to obtain the nano-mesoporous granular drug carrier which can efficiently convey the anti-cancer drugs and has the photothermal effect. The particle size of the drug carrier is 20 to 200 nm, and the mesoporous aperture is 2 to 10 nm; the mesoporous channels are in tree branch-shaped distribution. The nano-mesoporous granular drug carrier has the function of pH responsive and controlled release of the anti-cancer drugs and the good photothermal effect, has the advantages of realizing a medical chemotherapy and photothermal therapy combination cancer treatment method and has a wide popularization and application value.

Certain embodiments of the invention are directed to a photothermal immunoassay employing a thermometer or colorimetric detection method for sensitive quantitative readout based on the photothermal effect provided by a detection reagent.

The invention provides a sea water desalination method based on the photothermal effect of copper nanoparticles. The method includes the steps: covering a cellulose membrane with the copper nanoparticles; placing the cellulose membrane with the surface covered with the copper nanoparticles into a sea water surface to be desalinated; irradiating the surface of the cellulose membrane by a light source; evaporating sea water; collecting the evaporated water; desalinating the sea water. The copper nanoparticles can nearly completely and all-dimensionally absorb sunlight in a wideband manner, solarenergy is efficiently converted into heat energy, the cellulose membrane with a porous surface is highly hydrophilic, can float on the water surface, accelerates water pumping water delivery and cooperates with the photothermal effect of the copper nanoparticles, so that the cellulose membrane can be applied to the evaporation process of the sea water in nature, solar energy use ratio and water evaporation efficiency are greatly increased, the method can be widely applied to sea water desalination, the energy can be effectively used, and environments can be protected.

The invention relates to a laser thermal therapy probe based on a photothermal effect of an optical fiber material. The laser thermal therapy probe comprises a light transmission optical fiber, a protective sleeve, an optical fiber temperature sensor and a photothermal probe. The front end or the back end of the photothermal probe is connected with the optical fiber temperature sensor; the optical fiber temperature sensor on the back end is connected with the light transmission optical fiber; the protective sleeve wraps outside the light transmission optical fiber, the optical fiber temperature sensor and the photothermal probe. In a therapy process, the thermal therapy probe is put into a tissue requiring a treatment, the imported laser is converted into a thermal energy by the photothermal probe, and the thermal energy is conducted and radiated all around by centering on the probe, accordingly forming a certain temperature field distribution in the tissue. A complete distributed measurement of temperature distribution field temperature information around the tissue is achieved by the optical fiber temperature sensor. Being simple in structure, low in cost, small in size, and easy to manufacture, the laser thermal therapy probe based on the photothermal effect of the optical fiber material can measure the temperature distribution in real time, thereby providing a safe and highly practical probe structure as well as a small-size point heat source device with precise temperature control to the laser-induced interstitial thermal therapy.

The invention discloses a porous graphene film prepared by a laser processing method, and a preparation method and application thereof, and belongs to the technical field of material preparation. Thelaser processing method is utilized to process a polyimide film material, the polyimide material is subjected to high-temperature decomposition through photothermal effect of laser to prepare the laser-induced graphene (LIG), and meanwhile, gas escapes in the reaction process so that the prepared LIG has a porous structure. The porous structure of the LIG is favorable for reflecting incident sunlight for multiple times, so that the optical path is increased, and the absorptivity of the sunlight is improved. After LIG is subjected to oxygen plasma treatment, the surface of LIG is more hydrophilic, and the LIG can be in full contact with liquid water. Besides, the LIG is benefited from a porous structure, high light absorption rate and good photothermal conversion capability, and the film can be used for a solar seawater desalination device to desalinate seawater. The film can also be used for an evaporative humidifier to improve the environment humidity.

The invention belongs to the technical field of material surface engineering, and relates to an anti-icing coating and an anti-icing material, and preparation methods thereof. The preparation method of the anti-icing material comprises the following steps: putting a base material into iodine steam, carrying out adsorption treatment, then spraying the anti-icing coating on the base material subjected to adsorption treatment, and drying to obtain the anti-icing material. The photothermal effect of iodine is introduced into the field of icing prevention for the first time, the base material treated by the iodine steam has excellent photothermal characteristics, and the temperature can be rapidly increased and heat is rapidly emitted under the irradiation of near-infrared light (700-1100 nm),so that an ice layer on the surface is gradually molten, and an ice-water mixture in a semi-molten state can easily slide off from the surface due to the water repellency characteristic of a rough structure of the surface, active photothermal deicing and passive icing prevention are combined, and the anti-icing efficiency is improved.