33 results about "Carbon nanodots" patented technology

The invention discloses a preparation method of an environment-friendly degradable single-sided perspective sticker, and belongs to the technical field of modified nano materials. The method comprises the following steps: (1) preparation of a multi-layer composite structure: mixing polylactic acid and poly (butylene succinate), adding nano-montmorillonite and a surface modifier, and carrying out melt blending to form a first-layer melt; stirring poly (butylene adipate-co-terephthalate) and fluorescent carbon nanodots to form a second layer of melt; the first layer, the pressure-sensitive adhesive layer and the second layer are co-extruded and compounded to form a film blank. And (2) construction of the nano-film: biaxially stretching the film blank, imprinting a micropore array, dipping in the silver nanoparticle suspension, and drying to obtain the nano-film. And (3) coating functionalization treatment: immersing into a fluorine-containing nano coating solution, and curing. And (4) post-treatment: carrying out secondary curing. The obtained single-sided perspective sticker is suitable for the fields of buildings, vehicle privacy films and the like, and solves the problems of serious pollution and slow degradation of a traditional sticker.

The invention discloses a carbon nanodot as well as a preparation method and application thereof, and relates to the technical field of carbon nanomaterials. The carbon nanodots are prepared from raw materials including nicotinamide, urea and citric acid or a derivative thereof through solvent heat treatment, and the derivative of the citric acid is selected from citrate, a citric acid hydrate or a hydrate of the citrate. According to the invention, nicotinamide is used as a precursor to synthesize the carbon nanodot under solvent heat treatment, so that the carbon nanodot integrates intrinsic biological activity, efficient photothermal conversion capability and red fluorescence imaging function at the same time, and the limitation of a single therapy is overcome through multifunctional synergistic therapy. In addition, the carbon nanodot provided by the invention has extremely high biological safety.

The present invention relates to the technical field of biomedical materials, and in particular to an experimental method for analyzing the assembly mechanism of carbon nanodots. The present invention discloses an experimental method for analyzing the assembly mechanism of carbon nanodots, comprising the steps of: (1) adding carbon nanodot assemblies to buffer systems of different pH values, molecular structures, and ionic strengths; (2) observing and recording the color change of the carbon nanodot assemblies, the position shift of the characteristic absorption peak of the ultraviolet-visible spectroscopic spectrum, and the change in the absorbance value of the characteristic absorption peak of the ultraviolet-visible spectroscopic spectrum; (3) analyzing the dissociation state of acidic functional groups and basic functional groups in different buffer systems using a pH calculation formula; (4) analyzing the depolymerization process of the carbon nanodot assemblies in combination with step (2) and step (3), and analyzing the assembly mechanism. The experimental and analytical methods designed by the present invention can be used to clarify the assembly mechanism of carbon nanodot assemblies constructed based on hydrogen bonds.

The present invention relates to the use of carbon nanodots to treat wastewater. Specifically, the invention relates to the use of carbon nanodots for improving the efficiency of microorganism-mediate

The application provides a carbon nanodot-based temperature sensor and a preparation method thereof. The carbon nanodot-based temperature sensor comprises, from bottom to top, a substrate layer, an interdigital electrode layer and a sensing layer. The sensing layer comprises hydrophilic carbon nanodot particles and an ionic salt. The sensing layer is formed by drop coating of a mixed aqueous solution of the hydrophilic carbon nanodot particles and the ionic salt. The preparation method is simple and easy to implement, and has low cost. The prepared temperature sensor has high sensitivity, high precision and high stability. The sensitivity of the temperature sensor reaches 345951.8%℃ ‑1 .

This invention discloses a type of N-doped carbon nanodots and their application in the detection of tinidazole, belonging to the field of analytical detection. The preparation method of the N-doped carbon nanodots in this invention is as follows: L-lysine, ethylenediamine, and water are mixed to form a mixture, which is then heated to react. After the reaction, the N-doped carbon nanodots are purified. This invention is the first to use L-lysine and ethylenediamine as precursors to prepare carbon nanodots and achieve quantitative detection of tinidazole. It is low-cost, highly sensitive, and suitable for rapid on-site detection, possessing high practical value and promising prospects for widespread application.

The invention relates to the technical field of explosive detection, and discloses a carbon nanodot fluorescent waveguide and a preparation method and application thereof. The method comprises the following steps: (1) activating the waveguide; (2) treating the waveguide obtained in the step (1) with amino silane to obtain an amino-modified waveguide; (3) treating the amino-modified waveguide with acyl chloride to obtain an acyl chloride-modified waveguide; and (4) carrying out pretreatment on carbon nanodots, and loading the pretreated carbon nanodots onto the acyl chloride modified waveguide to obtain the carbon nanodot fluorescent waveguide. According to the carbon nanodot fluorescent waveguide prepared by the method disclosed by the invention, the carbon nanodots can be stably attached to the waveguide, and accurate detection of nitro explosives is realized.

This invention discloses the application of turmeric carbon nanodots in the control of wheat scab. The application of turmeric carbon nanodots in the control of wheat scab was carried out under natural light irradiation conditions. The turmeric carbon nanodots were prepared by a method comprising the following steps: 1) taking turmeric powder and drying it for later use; 2) subjecting the system of the turmeric powder and solvent to a hydrothermal reaction, centrifuging after the reaction, and collecting the supernatant; 3) purifying the supernatant and drying it to obtain the turmeric carbon nanodots. This invention uses the naturally occurring herbaceous plant turmeric as a precursor and combines it with carbon nanodot technology to prepare turmeric CDs. Turmeric is widely available and easy to obtain. The prepared turmeric CDs have excellent antibacterial ability against Fusarium graminearum spores and a good control effect on wheat scab, without adversely affecting the growth of wheat seedlings. It is expected to be an ideal agricultural green fungicide with great market application prospects.

This invention discloses carbon nanodots, their preparation method, and their applications, relating to the field of carbon nanomaterials technology. The carbon nanodots are prepared by solvothermal treatment of nicotinamide, urea, and citric acid or its derivatives. The citric acid derivative is selected from citrate, citric acid hydrate, or citrate hydrate. This invention synthesizes carbon nanodots using nicotinamide as a precursor under solvothermal treatment, simultaneously integrating intrinsic bioactivity, efficient photothermal conversion capability, and red fluorescence imaging function. This multifunctional synergistic therapy overcomes the limitations of single-therapy approaches. Furthermore, the carbon nanodots provided by this invention exhibit extremely high biocompatibility.

The application discloses a preparation method of an environment-friendly degradable single-side perspective sticker and belongs to the technical field of modified nanometer materials. The method comprises the following steps: (1) preparation of a multilayer composite structure: mixing polylactic acid and polybutylene succinate, adding nano-montmorillonite and a surface modifier to melt blend to form a first layer melt; stirring polybutylene adipate terephthalate and fluorescent carbon nanodots to form a second layer melt; and forming a film blank by co-extruding the first layer, a pressure-sensitive adhesive layer and the second layer; (2) construction of a nanometer film: biaxially stretching the film blank, pressing a micropore array, immersing in a silver nanoparticle suspension and drying to obtain a nanometer film; (3) functionalization treatment of a coating layer: immersing in a fluorine-containing nanometer coating solution and solidifying; and (4) post-treatment: secondary solidification. The obtained single-side perspective sticker is suitable for fields such as building and vehicle privacy films, and solves the problems of large pollution and slow degradation of traditional stickers.

The invention provides a water-soluble soldering paste and a preparation method thereof, and belongs to the technical field of soldering pastes.The soldering paste is prepared from, by mass, 70-75% of alloy powder, 9-13% of conductive adhesive, 11-14% of scaling powder and 3-5% of other additives. The preparation method comprises the following steps: firstly, primarily mixing alloy powder and a conductive adhesive for 10 minutes, and then carrying out ball milling for 2.5 hours by using a ball mill at the rotating speed of 200rpm to obtain mixed powder; and the scaling powder and other additives are added into the mixed powder, stirring is conducted for 15 min through a stirring machine, then vacuum stirring is conducted for 20 min at the room temperature, bubbles in the materials are removed, and the water-soluble soldering paste is obtained. By adding the cobalt and the carbon nanodots, the wettability, the continuous printing stability, the welding spot mechanical strength and the thixotropic property of the water-soluble soldering paste are improved.

This invention discloses a carbon nanodot with H-aggregation properties, its preparation method, and its applications. Citric acid, p-phenylenediamine, and sodium hydroxide are dissolved in deionized water and stirred until fully dissolved to obtain a mixed solution A. Mixed solution A is then placed in a reaction vessel for a hydrothermal reaction to obtain product B. Finally, product B is naturally cooled and dialyzed to obtain carbon nanodots with H-aggregation properties. The carbon nanodots prepared by this invention are non-toxic, harmless, and can be stored for a long time. The fluorescence intensity and carrier lifetime can be controlled by concentration, making them suitable for photocatalysis.

This invention discloses a method for detecting nano-carbon dots, which can be used to detect nano-carbon particles or nano-carbon dots. The method includes: preparing a test solution containing nano-carbon dots and a detection substrate, wherein the substrate contains an active gold sol-gel based on SERS; mixing the test solution with the detection substrate to obtain a test sample; irradiating the detection substrate with a preset excitation light and acquiring the Raman spectrum fed back by the detection substrate to obtain a first control spectrum; and irradiating the test sample with the excitation light and acquiring the Raman spectrum fed back by the test sample to obtain an experimental spectrum; determining the components in the nano-carbon dots based on the first control spectrum and the experimental spectrum. This invention provides an effective and convenient means for detecting the components of nano-carbon dots.

This invention relates to copper single-atom carbon dot nanozymes with SOD enzyme activity, their preparation methods, and applications. The copper single-atom carbon dot nanozyme with SOD enzyme activity is obtained by loading copper single atoms onto the surface of nitrogen-doped carbon quantum dots, wherein the copper single atoms are in Cu... 2+ The nitrogen-doped carbon quantum dots are dispersed on the surface of nitrogen-doped carbon quantum dots. In this invention, the surface of the nitrogen-doped carbon quantum dots contains various asymmetric C and N sites, and the presence of N is beneficial for promoting Cu... 2+ Dispersion, reduction of Cu 2+ Reunion, through N and Cu 2+ Coordination to achieve stable Cu 2+ The atomic-level dispersion ensures the high activity, stability, and metal economy of the copper single-atom carbon nanodot nanozyme with SOD enzyme activity of the present invention.

The invention belongs to the technical field of biological breeding, and particularly relates to a vegetable seed seedling cultivation method based on gene editing, which comprises the following steps: constructing a targeting nano delivery carrier loaded with gene editing ribonucleoprotein (RNP), the carrier is composed of surface modified polyethyleneimine and carbon nanodots of stem tip meristem homing peptide (MHP), and the carbon nanodots are uniformly distributed on the surface modified polyethyleneimine and the stem tip meristem homing peptide (MHP). RNP is delivered to stem tip meristem of a vegetable seedling through a micro-droplet in-situ permeation method, so that instantaneous editing of a target gene is realized, and homozygous editing seeds without exogenous gene residues are obtained through sexual reproduction. By means of the scheme, non-transgenic gene editing without genetic transformation and tissue culture is achieved, and the method has the advantages of being easy and convenient to operate, short in period, high in efficiency and wide in applicability and is suitable for character improvement of various vegetables such as tomatoes, spinach and cucumbers.

The invention relates to the technical field of waterproof coiled materials, and discloses a carbon nanodot-based antibacterial waterproof coiled material and a preparation method thereof.The waterproof coiled material comprises a waterproof antibacterial functional layer, a bonding layer and a polyester non-woven fabric base material layer which are sequentially arranged from top to bottom; wherein the waterproof antibacterial functional layer is prepared from the following raw materials in parts by mass: 82 to 85 parts of SBS (Styrene Butadiene Styrene) modified asphalt, 1.2 to 1.8 parts of carbon nanodots, 1.0 to 1.5 parts of aminated nano zinc oxide, 2.5 to 3.0 parts of nano silicon dioxide, 0.3 to 0.5 part of silane coupling agent, 0.2 to 0.3 part of antioxidant, 0.3 to 0.5 part of dispersing agent, 0.1 to 0.2 part of mildew preventive and 7.0 to 10 parts of light calcium carbonate. According to the invention, not only can the antibacterial performance of the waterproof roll be improved, but also the good waterproof performance can be maintained, but also the tensile strength and wear resistance of the waterproof roll can be enhanced while the waterproof impermeability is improved.

Disclosed herein is a plurality of doped carbon nanodots, comprising: a plurality of carbon nanodots; and a dopant comprising from one or more of the group consisting of Si, Ce and Se, wherein the weight percentage of the dopant based on the weight of atomic Si, Ce and Se, relative to the total weight of the plurality of carbon nanodots is from 1.5 to 4 wt%. Also disclosed herein are a method of preparing a plurality of carbon nanodots, a method of enhancing plant stress resilience to an abiotic stressor, use of a plurality of doped carbon nanodots, and a fertilizer formulation comprising a plurality of doped carbon nanodots.

The invention discloses a negative ion antibacterial water-based paint for aquaculture and a preparation method thereof, and relates to the technical field of water-based paints.The negative ion antibacterial water-based paint is prepared, six-ring stone is added, and the six-ring stone can release negative ions and can play roles in sterilization and air purification. The quaternary ammonium modified chitosan is loaded on the hexacyclic stone, so that the antibacterial effect of the hexacyclic stone is further enhanced. According to the nitrogen-doped carbon nanodots prepared by the invention, ethylenediamine is used as a nitrogen source, and amino groups and acylamino groups are successfully inoculated to the surfaces of the carbon dots; the nitrogen-doped carbon nanodots are good in biocompatibility and low in toxicity, the nitrogen-doped carbon nanodots are compounded with the sophora flavescens polysaccharides, and the sophora flavescens polysaccharides are negatively charged and can interact with cation nutrient substances absorbed by bacteria, so that absorption of the bacteria to the nutrient substances is reduced, ion transport channel protein can be attacked, cells are dead, and the antibacterial effect is achieved.

The invention discloses a multifunctional nano material fluorescence-colorimetric dual-mode food-borne pathogenic bacterium detection and killing method and a system thereof. According to the method, a metal organic framework material (MIL-53 (Fe)) with nano-enzyme activity is used as a signal switch and a generator, carbon nanodots (CDs) of a fluorescence indication and photo-thermal sterilization unit are combined to form a basic platform, and masking of an aptamer on a nano-enzyme active site and competitive release under triggering of target bacteria are used as a core mechanism. A colorimetric and ratiometric fluorescence double-signal channel is activated to realize self-verification high-precision detection; cDs in the system are used as a photo-thermal element, and in-situ photo-thermal sterilization is realized after detection. The platform design that detection objects can be switched by replacing the aptamers shows good universality and application prospects, and a sensitive and efficient new strategy is provided for detection and elimination of food-borne pathogenic bacteria.

The invention relates to the technical field of nano antibacterial materials. The invention relates to a carbon nanodot, in particular to an all-weather broad-spectrum antibacterial antivirus carbon nanodot and a preparation method and application thereof. The preparation method of the all-weather broad-spectrum antibacterial antivirus carbon nanodots comprises the following steps: 1) adding an auxiliary solution into a high-molecular polymer to obtain a precursor solution; 2) transferring the precursor solution into a reactor, and reacting for 1-24 hours under the condition of 100-500 DEG C; and 3) after the reaction is finished, cooling to room temperature, collecting reaction liquid, and separating and purifying to obtain the carbon nanodots, wherein the high-molecular polymer is selected from a structure shown in the specification. The carbon nanodot can have an efficient killing effect on pathogenic microorganisms including but not limited to escherichia coli, staphylococcus aureus, candida albicans and other bacteria, fungi, influenza viruses and the like in all-weather environments such as sunny days, cloudy days, daytime and night, and meanwhile, the carbon nanodot prepared by the preparation method is high in biological safety and high in cost performance.

This invention relates to the field of luminescent materials technology, specifically to a method for preparing room-temperature solid-state phosphorescent stable dual-matrix carbon nanodots and their applications. The method uses dextrin, 3-aminopropyltriethoxysilane, and boric acid as raw materials. By simultaneously introducing a silicon matrix and a boron matrix to form a dual-matrix system, the method combines the excellent stability of the silicon matrix with the unique electronic modulation capabilities of boron. Room-temperature solid-state phosphorescent stable dual-matrix carbon nanodots are synthesized via a hydrothermal method. After three cycles of water immersion-drying, the phosphorescence intensity of the obtained dual-matrix carbon nanodots decreases by only 6% to 7%. The carbon nanodots synthesized by this method have broad application prospects in the fields of anti-counterfeiting and information encryption.

The invention relates to the technical field of wood-plastic composite materials, and discloses a carbon nanodot antibacterial wood-plastic composite material and a preparation method thereof. The carbon nanodot antibacterial wood-plastic composite material is prepared from the following raw materials in parts by mass: 90 to 110 parts of matrix resin, 50 to 70 parts of wood filler, 30 to 50 parts of wood fiber powder treated by the carbon nanodot antibacterial composite material, 5 to 10 parts of nano zinc oxide, 3 to 6 parts of silver ion loaded mesoporous silica, 0.8 to 1.5 parts of modified graphene quantum dots and 2.5 to 4 parts of coupling agent, 4-7 parts of an interface compatilizer, 1.5-3 parts of a processing aid, 2.5-5 parts of an anti-aging aid and 12-20 parts of talcum powder. The core problems that a traditional wood-plastic composite material is poor in antibacterial property, insufficient in mechanical property, poor in environmental protection property and limited in stability are solved, multi-dimensional balance of long-acting antibacterial property, mechanical quality optimization, environmental protection standard reaching and use durability is achieved, and remarkable technical innovation and wide industrial application prospects are achieved.

The invention relates to the related technical field of wheat disease prevention and control, in particular to a preparation method and application of carbon nanodots for wheat disease prevention and control, semen cassiae is used as a precursor, ethyl alcohol is used as a reaction solvent, the semen cassiae and the ethyl alcohol are mixed according to the mass ratio of 1: 2-1: 10 to obtain a mixed precursor, then the mixed precursor is placed in a reaction kettle to be sealed, and the carbon nanodots are prepared at the heating temperature of 140-180 DEG C for 1-2 h. The preparation method comprises the following steps: adding carbon nanodots into a reaction kettle, reacting for 2-8 hours, filtering the reacted solution to remove reaction residues, reserving the solution, putting the solution into a drying box, drying at 60 DEG C to obtain powder, re-dispersing the dried powder by using deionized water, dialyzing by using a dialysis bag with the molecular weight of 500 for 12 hours, and freeze-drying a sample by using a freeze-drying machine to obtain the carbon nanodot powder capable of being used for preventing and treating wheat diseases. The carbon nanodots can effectively generate active oxygen under excitation of visible light, disease fungi can be killed through a photophysical process, generation of drug resistance can be reduced to the maximum extent, and the disease incidence rate of wheat in the field can be effectively reduced by spraying the carbon nanodot solution to wheat.

The application discloses carbon nanodots for resisting multi-drug resistant bacterial biofilm and a preparation method and application thereof. The carbon nanodots are prepared as follows: taking dopamine hydrochloride and diethylene triamine as raw materials, dissolving in deionized water, transferring the reaction solution to a reaction kettle, reacting at 80-200 DEG C for 1-24h, and subjecting the reaction product to dialysis and freeze-drying to obtain the carbon nanodots. The prepared carbon nanodots are used for resisting multi-drug resistant bacteria, methicillin-resistant Staphylococcus aureus (MRSA) biofilm. The results show that the carbon nanodots have excellent performance of inhibiting the formation of MRSA biofilm and eliminating mature MRSA biofilm. In addition, the carbon nanodots can be applied to the preservation of perishable foods such as strawberries. The preparation method is simple and easy to operate, has low cost and good reproducibility, provides entities and technical guidance for the prevention and treatment of biofilm related infections and food safety protection, and provides a basis for the preparation and application of multifunctional antimicrobial materials.

The invention relates to the technical field of special functional coating materials. The invention relates to a self-cleaning coating, in particular to an all-weather carbon nanodot-based self-cleaning coating and application. The formed self-cleaning coating comprises the following raw material components: a main body coating and a carbon nanodot aqueous solution serving as a coating additive; wherein the carbon nanodot aqueous solution is prepared according to the following steps: 1) adding an auxiliary agent solution into a high-molecular polymer to obtain a precursor solution; 2) transferring the precursor solution into a reactor, and reacting for 1-24 hours under the condition of 100-500 DEG C; and 3) after the reaction is finished, cooling to room temperature, collecting reaction liquid, and separating and purifying to obtain the product. The high-molecular polymer is selected from a structure shown in the specification. According to the coating, the inherent antibacterial performance of the carbon nanodots and the performance of generating active oxygen through photosensitization are utilized, stable sterilization and disinfection are achieved under the light or dark environment, formaldehyde is efficiently degraded under the light condition, and the coating can be widely applied to the fields of buildings, medical treatment, food processing, transportation and the like and has important industrial application value.

The invention relates to the technical field of nano materials and plant protection, in particular to a nitrogen-doped carbon nanodot, a preparation method thereof and application of the nitrogen-doped carbon nanodot in prevention and treatment of rice brown planthopper. The nitrogen-doped carbon nanodots are prepared in an internal circulation type rotating packed bed through a mild method of simple heating. Compared with a traditional method, the preparation method has the advantages that the small-size monodispersed nitrogen-doped carbon nanodots can be obtained more easily, meanwhile, the reaction time can be remarkably shortened, and rapid batch preparation of the nitrogen-doped carbon nanodots is facilitated. According to the invention, on the basis of the nitrogen-doped carbon nanodots, the nitrogen-doped carbon nanodot-sodium lignin sulfonate composite microspheres are further prepared. The nitrogen-doped carbon nanodots and the nitrogen-doped carbon nanodot-sodium lignin sulfonate composite microspheres can cooperate with insecticides to be applied to prevention and treatment of rice brown planthopper, and a new method is provided for solving the problem of pesticide resistance of agricultural pests.

The invention discloses a platinum drug ultra-carbon dot as well as a preparation method and application thereof. The platinum drug ultra-carbon dot is formed by assembling platinum drug carbon nanodots. The platinum drug carbon nanodot is a coordination compound of a platinum drug and a substituted aromatic compound; the platinum drug is selected from at least one of carboplatin oxide, cis-platinum oxide, cis-platinum diacid and oxaliplatin oxide. The platinum drug ultra-carbon dots have the advantages that the laser wavelength is longer, the penetrability of exciting light in the body is better, the circularity of the platinum drug ultra-carbon dots in the body can be further improved, the platinum drug ultra-carbon dots have efficient cell endocytosis efficiency and tumor enrichment efficiency, in addition, the platinum drug ultra-carbon dots can be enriched in cancer cells or tumor cell parts, and the tumor enrichment efficiency is improved. Under the irradiation of near-infrared band light, Pt (II) compounds and hydroxyl radicals with high cytotoxicity can be quickly generated, so that cancer cells are killed by immunogenicity, and the anti-tumor immune response of an organism is activated while the cancer cells are killed.

The invention provides a porphyromonas gingivalis derived multienzyme active carbon nanodot as well as a preparation method and application thereof, and belongs to the technical field of nano synthesis. The preparation method comprises the following steps: carrying out enrichment culture on porphyromonas gingivalis by adopting a brain heart leachate broth (BHI) culture medium containing heme to prepare a bacterium suspension of the porphyromonas gingivalis; the preparation method comprises the following steps: carrying out hydrothermal reaction on a bacterium suspension of porphyromonas gingivalis, centrifuging after the reaction is finished, dialyzing supernate overnight, and freeze-drying to obtain the porphyromonas gingivalis derived multienzyme active carbon nanodots. The carbon nanodot is doped with a small amount of iron element, is uniform in particle size, has a crystal structure similar to graphene, has peroxidase-like, catalase-like and superoxide dismutase-like activities, and has excellent biological safety.

The invention discloses a preparation method of a porous micron metal fluoride composite positive electrode material modified by carbon nanodots and application of the porous micron metal fluoride composite positive electrode material in a lithium ion battery. Taking carbon nanodot modified porous micron ferrous fluoride as an example, the material is prepared through a stepped in-situ synthesis strategy: a three-dimensional porous iron trifluoride skeleton is constructed by combining a liquid phase method with low-temperature calcination, and carbon nanodots are deposited and anchored in an acetylene atmosphere by using a chemical vapor deposition technology. According to the composite structure, the advantage of high volume energy density of a porous micron material is combined with a continuous conductive network constructed by carbon nanodots, and the inherent problems of poor conductivity and slow ion transmission of a traditional metal fluoride material are solved. The process is simple and controllable, a new thought is provided for development of the positive electrode material of the high-performance lithium ion battery, the industrial application potential is achieved, and meanwhile the wide popularization value is achieved in the aspect of synthesis methodology.

The invention relates to the crossing field of medical imaging and nano material technologies, in particular to an ultrasonic frequency resonance amplification long afterglow imaging system and method. The system comprises a resonance response unit and a frequency matching excitation unit. The resonance response unit comprises composite nanoparticles formed by carbon nanodots and an amphiphilic block copolymer according to a preset mass ratio, and the acoustic resonance frequency of the composite nanoparticles is matched with the target ultrasonic frequency; and the frequency matching excitation unit is used for emitting ultrasonic waves matched with the acoustic resonance frequency of the resonance response unit and exciting the composite nanoparticles to generate long afterglow emitted after resonance amplification. The method includes applying a resonance response unit to a target area; using a frequency matching excitation unit to irradiate the target area with ultrasonic waves matched with the resonance frequency of the resonance response unit; after the ultrasonic radiation is stopped, a long afterglow optical signal generated by the resonance amplification effect is detected to acquire an image of the target area.