3151 results about "Light absorbance" patented technology

The invention discloses a communication encryption method based on a two-dimensional inorganic / inorganic Van der Waals heterojunction polarized photoelectric detector, and belongs to the technical field of photoelectric devices. The photoelectric detector comprises a substrate, two-dimensional MoSe2 material layers, two-dimensional ReS2 material layers and a thin film electrode, wherein the two two-dimensional material layers form a Van der Waals vertical heterojunction and are of an II-type heterostructure; due to anisotropic light absorption of ReS2, effective carrier collection and transport capabilities of MoSe2 and an inhibition effect of heterojunction on dark current, the photoelectric property of the two-dimensional ReS2 / MoSe2 photoelectric detector is obviously improved, and meanwhile, the two-dimensional ReS2 / MoSe2 photoelectric detector has high responsivity of 89.4 A / W, fast response speed of 30.5 s and polarization sensitive characteristics, and can be applied to the field of photoelectric detectors. On the basis, information is subjected to multiple encryption by means of a polarization state information encryption technology, so that the concealment and security of an information transmission process can be greatly improved, and a new possibility is provided for the development of a security communication technology in the future.

The invention discloses a continuous monitoring method for neonatal jaundice and a related device. The method comprises the steps that a sensor module arranged on a patch or a bracelet is used for percutaneously measuring the bilirubin level of a neonate; the measurement data of the photoelectric sensor is corrected according to the data of the temperature sensor, the bilirubin level of the newborn is calculated through a preset bilirubin model based on the corrected data of the photoelectric sensor, and the preset bilirubin model comprises a light absorption model and a dynamic correction model; establishing a relation model of light absorption and bilirubin concentration by the light absorption model; the dynamic correction model adjusts parameters of the light absorption model; and transmitting the bilirubin level to a remote server, and when the bilirubin level exceeds a preset alarm threshold, generating an alarm signal and pushing the alarm signal to a medical staff client and / or a parent client. According to the invention, personalized continuous monitoring of neonatal jaundice is realized through a dynamic correction model, an intelligent alarm threshold, closed-loop control and auxiliary treatment means.

A light absorber 10 has a transmission spectrum satisfying the following requirements (I), (II), (III), (IV), and (V) at an incident angle of 0°. The light absorber 10 has a haze less than 0.20%. (I) An average transmittance TA0deg(460-600) is 75% or more. (II) A shorter cut-off wavelength λH0deg(s) is in a range of 390 nm to 450 nm. (III) A longer cut-off wavelength λH0deg(L) is in a range of 600 nm to 680 nm. (IV) An average TA0deg(300-380) is 1.2% or less. (V) An average TA0deg(750-1000) is 1.2% or less.

The invention provides an endangered animal monitoring method based on a multi-mode floating gate type photoelectric synapse transistor, realizes multi-mode fusion of images (optical signals) and sounds (electric signals) by utilizing the light absorption capability of quantum dots and the high carrier mobility of a two-dimensional channel material, and belongs to the technical field of sensing, storage and calculation integration and endangered animal identification and monitoring. According to the method, a photoelectric synapse device is used as a reservoir, and input time sequence signals are respectively applied to a multi-mode fused photoelectric synapse transistor in the form of light and electric pulse. And along with the co-stimulation of light and electric pulse, the change response of source-drain current is generated, and the fusion processing of the multi-mode signal is realized. By adopting the method, a human multi-sensory fusion signal processing mode is successfully simulated, and accurate recognition under complex and changeable conditions can be realized by utilizing a mode of complementation of visual signals and auditory signals. Under an extreme environment or a high noise condition, edge processing and identification can be carried out on pictures and sounds of endangered animals, and a high-accuracy monitoring result can be obtained without a large amount of data return, so that the energy consumption is reduced and the monitoring efficiency is enhanced.

A photoacoustic catheter adapted for placement within a blood vessel having a vessel wall includes an elongate shaft, a balloon and a photoacoustic transducer. The elongate shaft can extend from a proximal region to a distal region. The elongate shaft can include a light guide that is configured to be placed in optical communication with a light source. The balloon is coupled to the elongate shaft, and can be configured to expand from a collapsed configuration suitable for advancing the photoacoustic catheter through a patient's vasculature to a first expanded configuration suitable for anchoring the photoacoustic catheter in position relative to a treatment site. The photoacoustic transducer can be disposed on a surface of the balloon and in optical communication with the light guide. The photoacoustic transducer can include a light-absorbing material and a thermal expansion material.

The invention discloses a puncture path planning method and system, and aims to quickly calculate optimal puncture path information based on optical and computer rendering thoughts so as to provide reference for medical staff and provide an auxiliary means for clinically acquiring information. The method comprises the following steps: constructing a three-dimensional model through a medical image; the method comprises the following steps: defining organs and tissues as units with incompletely same light absorbance, and assigning light absorption coefficients to each unit according to whether a biopsy needle is allowed to pass or not and the risk degree of puncture; a light source is arranged in a puncture target area, gray information of the skin surface is obtained by analyzing the light absorbance on different paths, and the gray information is used for feeding back the recommendation degree of each puncture starting point. According to the method, selection of the puncture path is converted into searching of the optimal puncture starting point, a brand-new concept of planning and recommending the puncture path is provided by combining the optical propagation principle, and the position information of the optimal puncture starting point can be visually displayed and is more comprehensive and reliable.

An optical detector system providing electrical output signals. The system includes an apertured surface and a transparent window, with a metasurface on the window's opposite side. The metasurface imparts spatially varying phase delay and / or amplitude or polarization modulation to deflect ILR based on their angle of incidence, producing exiting light rays. These rays are detected by a two-dimensional tetralateral position-sensing detector (TLD) with a single resistive photo-absorption layer and four electrodes. The TLD generates X-Y position signals proportional to the azimuth and elevation of the incoming ILR. A computer may be included to calculate these angular values from the position signals.

The invention discloses a quasi one-dimensional (TaSe4) 2I and two-dimensional MoTe2 mixed-dimensional heterojunction phototransistor detector and a preparation method thereof, the detector sequentially comprises a Si substrate, a SiO2 gate dielectric layer, a quasi one-dimensional (TaSe4) 2I and two-dimensional MoTe2 nano film from bottom to top, the quasi one-dimensional (TaSe4) 2I and MoTe2 nano film are respectively provided with a metal electrode, and a heterostructure of the (TaSe4) 2I, the MoTe2 and the metal electrodes is formed. The preparation method comprises the following steps: (1) transferring the (TaSe4) 2I nanowire to the Si substrate; (2) transferring the MoTe2 nano film to one side of the (TaSe4) 2I nanowire; (3) preparing a pattern of a bottom electrode; (4) positioning, exposing and developing the pattern of the bottom electrode to expose the electrode part needing to be evaporated; and (5) preparing a metal electrode. According to the invention, the composite effect of a (TaSe4) 2I / MoTe2 heterojunction is utilized, and dark current is inhibited through a vertical structure; moTe2 is utilized to increase light absorption, and meanwhile, grid voltage is applied, so that light current is improved, and high responsivity and external quantum efficiency are obtained.

The invention discloses a doped material based on a hexagonal boron nitride / titanium dioxide heterojunction and a preparation method thereof. According to the material, a heterojunction is formed by hexagonal boron nitride and titanium dioxide, and the light absorption performance, the carrier mobility and the photocatalytic efficiency are optimized by doping a nitrogen element, an iron element and a fluorine element; wherein the doped nitrogen element can reduce a band gap by introducing a defect energy level, and broaden a light absorption range to a visible light region and an infrared light region; the doped iron element can promote carrier separation by introducing an intermediate energy level; the doped fluorine element can inhibit carrier recombination by reducing surface defects. The light absorption efficiency of the material in the ultraviolet light range can be improved by constructing the layered # imgabs0 # heterojunction composite material, and the migration rate of electrons and holes can be improved by doping the N element, the Fe element and the F element in the # imgabs1 #, so that the oxidation-reduction reaction is promoted, and reference significance is provided for further improving the application effect of a photocatalyst in sewage treatment.

Structures for a photonics chip that include a photonic component and methods of forming such structures. The structure may comprise a photodetector on a substrate and a waveguide core. The photodetector includes a light-absorbing layer having a longitudinal axis, a first sidewall, and a second sidewall adjoined to the first sidewall at an interior angle. The first sidewall is slanted relative to the longitudinal axis, and the second sidewall is oriented transverse to the longitudinal axis. The waveguide core includes a tapered section adjacent to the first sidewall and the second sidewall of the light-absorbing layer.

The invention discloses a full-polarized light acoustic imaging method and device based on a vector absorption ball. The method comprises the following steps: expressing light absorption characteristics of a sample by establishing a mathematical model of the vector absorption ball; measuring the absorption intensity of the sample absorber under the exciting light in different polarization states through a photoacoustic signal; reconstructing a vector absorption ball of each point of the sample according to the absorption intensity of each point of the sample under different polarized exciting light; five structural parameters are extracted through the vector absorption balls at all points of the sample to reconstruct a structural characteristic diagram of the sample; the full-polarized light acoustic imaging device based on the vector absorption ball comprises a polarized pulse light modulation excitation module, a signal detection module, a two-dimensional scanning module and a signal processing module. The method provided by the invention overcomes the defect that the polarization absorption of the sample cannot be completely expressed by the traditional polarized light acoustic imaging, and realizes the measurement of the full-polarization absorption characteristic and the complete structure expression of the corresponding sample in the same set of light path.

The invention provides a data processing method and system for an aerosol analyzer, and belongs to the technical field of data processing of aerosol analyzers, and the method comprises the following steps: collecting light absorption signals of aerosol particles according to a light source system and a detector, and generating an original electric signal; preprocessing the original electric signal to obtain preprocessed data; extracting an absorption coefficient, a multiband light attenuation characteristic and a mass concentration parameter of the black carbon aerosol from the preprocessed data; analyzing the features based on a machine learning model, outputting a real-time prediction result of the concentration of the black carbon aerosol, and preprocessing the original electric signal to obtain preprocessed data, including the step of noise removal. According to the method, baseline drift is dynamically corrected through a polynomial fitting algorithm, wavelet transform denoising and a machine learning model are combined, the accuracy and real-time performance of black carbon aerosol concentration detection are remarkably improved, and the problems that in a traditional method, manual intervention is much, and the model generalization ability is poor are solved.

The invention provides a single-photon avalanche diode and a single-photon detector, and relates to the technical field of semiconductor photoelectric detection, and the single-photon avalanche diode comprises a plurality of avalanche diode units. The avalanche diode units are sequentially stacked in the propagation direction of incident light to be detected. Each avalanche diode unit is provided with an electric field control module which is used for independently adjusting the bias electric field of each avalanche diode unit. In the propagation direction of the incident light, the avalanche diode unit of the next stage is used for absorbing the remaining photons which are not absorbed by the avalanche diode unit of the previous stage and generating carriers, so that avalanche current is formed. The light absorption wavelength ranges of adjacent avalanche diode units are at least partially overlapped. The single-photon avalanche diode solves the problem that the existing single-photon avalanche diode cannot balance high detection efficiency and low dark current, and achieves the purpose of improving the detection efficiency of a single-photon detector on the premise of not increasing the dark current.

This semiconductor light-receiving element (1) is provided with: a substrate (10); a semiconductor laminated part (20) that is formed on the substrate (10); and a first electrode (40) and a second electrode (50) that are electrically connected to the semiconductor laminated part (20). The semiconductor laminated portion (20) includes a light absorption layer (24) including InGaAs and including a first region (24a) of a first conductivity type, a first semiconductor layer (S1) located between the substrate (10) and the light absorption layer (24), a second semiconductor layer (S2) located on the opposite side of the substrate (10) with respect to the light absorption layer (24), and a first region (24a) of a second conductivity type formed of InP, InGaAsP, InAsP, InGaAsP, InAsP, InGaAsP, InAsP, InGaAsP, InAsP, InGaAsP, InGaAsP, InAsP, InGaAsP, InGaAsP, InAsP, InGaAsP, InGaAsP, InGaAsP, InGaAsP, InGaAsP, InGaAsP, and a capacitance reduction layer (23) of the first conductivity type, which has an arbitrary configuration of AlInGaAs and is positioned between the light absorption layer (24) and one of the first semiconductor layer (S1) and the second semiconductor layer (S2), and which has a carrier concentration of 5 * 1015 cm-3 or less and is higher than the carrier concentration of the first region (24a) of the light absorption layer (24). The band gap of the capacitance reduction layer (23) is larger than the band gap of the light absorption layer (24).

Disclosed in the present application is a photovoltaic module, comprising a reflective structure and a cell string group, wherein the cell string group comprises a plurality of cells, and gaps are provided between the plurality of cells; the orthographic projection of the reflective structure on the cell string group covers at least the gaps between the plurality of cells; and the reflective structure comprises a first reflective layer close to the cells and a second reflective layer stacked with the first reflective layer, the first reflective layer is an organic material layer, and the second reflective layer is a metal layer. In the embodiments of the present application, infrared light that is incident on the gaps between the plurality of cells is reflected by the reflective structure, so that the infrared light re-irradiates the cells, enabling the cells to absorb the infrared light and convert same into electric energy, thereby increasing the generation power of the photovoltaic module.

The invention discloses an ultra-compact near-infrared circularly polarized photoelectric detector, which comprises an upper metal electrode plating layer, a lower metal electrode plating layer, a semiconductor substrate, a hexagonal close packing array substrate and a chiral super-surface layer, and can realize rapid and high-responsivity near-infrared circular polarization dependent light detection, and light signals can be directly converted into visible electric signals under zero bias voltage; different photoelectric signal conversion effects can be generated from different directions under irradiation of light with different wavelengths, and reference is provided for preparation of a multi-mode near-infrared circularly polarized photoelectric detector. The invention also discloses a preparation method of the ultra-compact near-infrared circularly polarized photoelectric detector, the preparation method is simple and convenient, the cost is relatively low, batch preparation can be realized, and the produced ultra-compact near-infrared circularly polarized photoelectric detector has the characteristics of high light absorbance, quick response and ultrahigh integration level.

The invention discloses a sulfur-rich vacancy ZnIn2S4 at FeNi < 0.48 > S < 1.71 > heterojunction photocatalyst as well as a preparation method and application thereof, and the photocatalyst is a sulfur-rich vacancy ZnIn2S4 at FeNi < 0.48 > S < 1.71 > heterojunction composite material with a hollow structure, which is formed by in-situ growth of a sulfur-vacancy-containing ZnIn2S4 nanosheet on the surface of a FeNi < 0.48 > S < 1.71 > hollow nanosphere. The photocatalyst provided by the invention has a larger specific surface area and a wider light absorption range, and the internal sulfur vacancy as an electron capture center can inhibit the compounding of photo-induced electron-hole pairs. The three-dimensional core-shell hollow sphere structure can reduce the recombination rate of charges, improve the mobility of electrons, show better photocatalytic performance, and have great application prospects in the fields of energy and environment.

A light absorption filter that contains a resin; a dye having a main absorption wavelength band in a wavelength range of 400 to 700 nm, including at least one of a specific azo-based coloring agent represented by any of General Formulae (i) to (iv) or a specific indoaniline-based coloring agent represented by General Formula (v); and a compound that generates a radical upon ultraviolet irradiation. There is also an optical filter that uses the light absorption filter and a manufacturing method for the optical filter, as well as an organic electroluminescent display device, an inorganic electroluminescent display device, or a liquid crystal display device, which includes the optical filter.

The invention relates to a preparation method of a spiral dislocation stacked imine covalent organic framework material. The preparation method comprises the steps of preparing an imine covalent oligomer and preparing the spiral dislocation stacked imine covalent organic framework material. The invention also provides the spiral dislocation accumulation imine covalent organic framework material obtained by the preparation method and application of the spiral dislocation accumulation imine covalent organic framework material in light absorption semiconductor materials. The preparation method provided by the invention is simple, convenient, universal and easy to implement, and the imine covalent organic framework material with the spiral dislocation stacking structure is obtained, is clear in material structure and good in crystallinity, is a novel topological structure, and has a good potential application prospect in the photoelectric field.

The invention provides a Cu2O-based heterogeneous composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: coating the surface of a Cu2O hollow sphere substrate with a carbon layer, and depositing layered double hydroxides (LDHs) and metal palladium (Pd) nanoparticles on the carbon layer. According to the material, through a Cu2O-carbon layer-LDHs-Pd multistage heterostructure design, space optimization of light absorption, charge transfer and catalytic sites is realized; cu2O-carbon layer-LDHs interface coupling promotes directed migration of photo-induced electron-hole pairs, and the surface plasmon resonance effect of Pd nanoparticles enhances the charge separation efficiency; the LDHs optimizes a charge transfer path through surface oxygen vacancy or metal valence cycle, so that synergistic oxidation of non-free radicals and free radicals is realized, the organic matter degradation efficiency is remarkably improved, the oxidation path is widened, and the performance bottleneck of a single material is broken through.

The invention provides a photo-thermal material based on RE-MOF, a photo-thermal interface evaporator and a preparation method and application of the photo-thermal material. The photo-thermal material based on the RE-MOF comprises a two-dimensional nanosheet-shaped rare earth MOF material and a polydopamine coating layer on the surface of the rare earth MOF material. According to the photo-thermal material based on RE-MOF, the rare earth MOF material is coated with polydopamine, so that the photo-thermal material has high light absorption capacity and hydrothermal stability, the evaporation efficiency and photo-thermal conversion capacity of a photo-thermal interface evaporator can be effectively improved, the photo-thermal conversion capacity of the photo-thermal interface evaporator can be effectively improved when the photo-thermal material is applied to the photo-thermal interface evaporator, and the photo-thermal efficiency of the photo-thermal interface evaporator is improved. The photo-thermal interface evaporator which is high in sunlight absorption capacity, stable in performance structure, high in photo-thermal conversion efficiency and good in salt tolerance can be obtained.

The invention relates to a high-speed low-dark-current three-step structure avalanche photodetector and a preparation method thereof, and belongs to the technical field of semiconductor devices. Comprising an intrinsic InP substrate, an N-type InAlAs ohmic contact layer, an intrinsic InAlAs transition layer, an N-type InAlAs charge layer, an intrinsic InAlAs multiplication layer, a P-type InAlAs charge layer, an intrinsic InAlGaAs transition layer, an intrinsic InGaAs absorption layer, a gradient-doped P-type InGaAs absorption layer and a P-type InAlAs ohmic contact layer which are stacked from bottom to top. The intrinsic InGaAs absorption layer 8 and the N-type InAlAs ohmic contact layer 2 are both of a step structure so as to form a three-stage step structure of the photoelectric detector. According to the invention, through growing the SiNx antireflection film with the refractive index of 1.85 and the thickness of 210 nm on the light incident surface, the reflectivity of incident light can be less than 1%. For an optical signal with the wavelength of 1550 nm, the single light absorption quantum efficiency can reach 0.45.

The invention relates to an underwater image restoration method based on multi-modal visual guidance and characteristic decomposition, which is used for solving the problems in the prior art that color distortion and contrast reduction of an image are caused by light absorption due to gradual attenuation of light with different wavelengths in water, and the light is scattered when encountering particles in the water, so that the image cannot be restored. And the problems of image blurring and detail loss are solved. According to the scheme, multi-mode prompt learning is adopted, complementarity among multiple modes is utilized, and features from different modes are integrated into prompt information so as to support color and contrast recovery of underwater images; and extracting high-frequency information from the RGB modal features by using learnable wavelets, and focusing on fine and difficult-to-perceive detail areas in the high-frequency features by using a high-frequency mixed attention module so as to recover the definition of textures in the underwater image.

A spectroscopic apparatus including an analysis optical system, a length measuring optical system, and a calculation apparatus and performing spectroscopic analysis of a sample, the analysis optical system including a moving mirror having a first reflection surface and a second reflection surface, the moving mirror configured to be translated, a gas cell configured to encapsulate a gas and add a light absorption signal to the analysis light, and a first light receiver configured to receive the analysis light containing a sample derived signal, a first modulation signal, and the light absorption signal, the length measuring optical system including a length measuring optical system configured to acquire a displacement signal corresponding to the position of the moving mirror from laser light reflected off the second reflection surface, the calculation apparatus including a moving mirror position calculator, a light intensity calculator, a Fourier transformer, and a moving mirror position correction section.

The invention discloses a copper oxide-based photo-thermal conversion material, a preparation method and application thereof, and belongs to the technical field of photo-thermal materials.According to the method, a copper oxide microflower / carbon nano tube photo-thermal conversion material is synthesized through a microwave hydrothermal method, microflowers are formed by mutually supporting ordered nanosheets, and carbon nano tubes are wound on the nanosheets; the refraction and reflection times of incident light in the material can be increased by utilizing a light trap formed by the staggered micro-nano hierarchical structure, so that multiple absorption of sunlight is effectively promoted, and light capture is increased. Meanwhile, through the synergistic photo-thermal effect of the metal oxide semiconductor / carbon-based composite material, the evaporation rate and the light absorptivity can be improved. In addition, the composite photo-thermal material is applied to a 3D nested structure solar driving interface steam system, and continuous and efficient seawater desalination is achieved.

The invention relates to the technical field of optical materials and nano structures, in particular to an ultraviolet broadband light absorber based on graphene and a multi-layer periodic structure. The structure of the ultraviolet broadband light absorber sequentially comprises a graphene layer, a distributed Bragg reflection grating structure layer and a SiO2 substrate at the bottom from top to bottom. The preparation process of the ultraviolet broadband light absorber comprises the following steps: preparing the graphene layer; a SiO2 layer is deposited; depositing a TiO2 layer; carrying out multi-layer superposition; adding a graphene layer; and completing the device. The light absorption efficiency of graphene in the ultraviolet band is greatly improved, broadband efficient absorption within the wavelength range of 240-370 nm is achieved, the highest absorption rate can reach 99.75%, the absorber is not sensitive to polarization, the preparation process is simple, and technical support is provided for design of the efficient ultraviolet absorber.

A light absorption probe includes an arm segment, a main segment located at one side of the arm segment, a testing segment connected to another side of the arm segment, and a light absorption coating layer. The main segment has a soldering end portion and an extending end portion respectively located at two opposite sides thereof along a predetermined direction. The testing segment has an upright shape along the predetermined direction and includes a pinpoint portion and an upright portion that connects the pinpoint portion and the arm segment. The light absorption coating layer covers the upright portion, and the pinpoint portion is exposed from the light absorption coating layer. Through the light absorption coating layer, the testing segment only forms an observation point at the pinpoint portion in an observation process of a detection apparatus.

The invention discloses a preparation method for effectively reducing defects of a perovskite solar cell body. A 4-fluorobenzenesulfonamide additive is introduced into a perovskite precursor solution, a sulfonyl group, a fluorine group and the like are coordinated with lead in perovskite, the crystallization process of the film is regulated and controlled, nucleation and crystal growth of an organic lead halide perovskite light absorption layer are effectively controlled, meanwhile, non-radiative recombination is inhibited, charge transfer is promoted, and the photoelectric conversion efficiency is improved. The photoelectric conversion efficiency is obviously improved, the cost is reduced and the repeatability is good. The additive is introduced by a solution method, the process is simple and the cost is low. Experimental results show that after the 4-fluorobenzenesulfonamide additive is used, the trap state density of a perovskite layer is reduced from 4.45 * 10 < 15 > cm <-3 > to 3.26 * 10 < 15 > cm <-3 >, and the photoelectric conversion efficiency of a perovskite cell is improved from 22.20% to 24.15%. The invention provides an efficient and low-cost solution for defect passivation of the perovskite solar cell.

The invention discloses preparation and application of a ZnIn2S4 / amorphous MoO3-x nanodot Z system photocatalyst, and relates to the field of photocatalysis. The method is simple to operate and environment-friendly, and the prepared ZnIn2S4 / amorphous MoO3-x nanodot catalyst is excellent and stable in hydrogen production performance. The preparation method comprises the following steps: synthesizing amorphous MoO < 3-x > nanodots by using an ultrasonic chemical method, and loading the MoO < 3-x > nanodots on ZIS by using a one-pot hydrothermal method to obtain the ZM catalyst. The method comprises the following steps: weighing a certain amount of a ZM catalyst, placing the ZM catalyst in a quartz photoreactor, adding a triethanolamine aqueous solution without dissolved oxygen, introducing argon, exhausting air, and sealing the reactor; putting the reactor into a magnetic stirrer for stirring, and maintaining the temperature of the reactor through a thermostatic bath; the electron-hole separation efficiency of the composite catalyst is improved, the composite efficiency is reduced, and meanwhile, the light absorption range is expanded.

The invention relates to a light / heat / magnetic detachable high-strength polyurethane adhesive as well as a preparation method and application thereof. The light / heat / magnetic detachable high-strength polyurethane adhesive comprises a polyurethane adhesive and a functional filler. According to the light / heat / magnetic detachable high-strength polyurethane adhesive prepared by the preparation method disclosed by the invention, the colloid is black, and the adhesive has excellent light absorption performance and can realize rapid separation of an adhesive interface under infrared irradiation through a heat effect; meanwhile, the ferroferric oxide can be vibrated and heated under the action of an external magnetic field due to the magnetic response characteristic of the ferroferric oxide, so that fracture and separation of the adhesive layer are promoted. By means of the technology, efficient and reversible disassembly of parts bonded through the hot melt adhesive is achieved, possibility is provided for recycling and reusing of bonding materials and devices, and the problem that traditional polyurethane hot melt adhesive cannot be recycled is solved.