213 results about "Nanoclusters" patented technology

The invention discloses a method for detecting glucose on the basis of cascade catalysis of cerium dioxide / gold nano cluster-Prussian blue nano enzyme (AuNCs-CeO-HMPB). The material is prepared by compounding cerium dioxide (CeO) with similar glucose oxidase activity and hollow Prussian blue nanoparticles (AuNCs-HMPB) modified by gold nanoclusters with similar peroxidase activity through a hydrothermal assembly method. In the presence of glucose, CeO catalyzes oxidation of glucose to generate gluconic acid and H2O2, then AuNCs-HMPB synergistically catalyzes decomposition of newly generated H2O2 to generate high active oxygen species, further a colorless 3, 3 ', 5, 5'-tetramethyl benzidine (TMB) color developing agent is oxidized to generate obvious color change, and based on the cascade catalytic reaction, the enzyme-free glucose colorimetric sensor is successfully constructed. The sensor shows excellent detection performance on glucose under optimized conditions (pH = 4.0, 50 DEG C), the linear detection range is 10.00-90.00 [mu] mol / L, and the detection limit is 2.1 [mu] mol / L (S / N = 3).

The invention belongs to the technical field of biological medicine, and particularly relates to a chitosan modified gold nanocluster, a preparation method and application in red blood cell immobilization. According to the synthesis method of the CS-GSH-AuNCs cluster, a two-step low-temperature modification method is utilized, GSH-AuNCs core nanoparticles with a definite structure are synthesized firstly, then chitosan is modified through electrostatic interaction, the reaction condition is low temperature and nitrogen protection, the reaction condition is mild, the product repeatability is high, and the original structure of GSH-AuNCs is more complete. Experiments show that the CS-GSH-AuNCs cluster synthesized by the method has good acid and alkali tolerance and temperature tolerance, the effect of immobilizing red blood cells is good, and the biological safety is high.

The application discloses a preparation method and application of a zirconium dioxide loaded iridium oxide nanocluster oxygen evolution electrocatalyst. A mixed solution of zirconium salt, amide solvent and organic acid is prepared, and the mixed solution is kept at 120 DEG C for 24 hours; after cooling, the white product is separated, washed and dried. Then, the product and iridium salt are dispersed in a mixed solution of tetrahydrofuran and water, and sodium nitrate and potassium nitrate aqueous solution are added under stirring; after stirring, rotary evaporation is carried out at 60 DEG C, and the greenish powder obtained after drying is vacuum dried at 60 DEG C for 12 hours; the greenish powder is kept in a muffle furnace at 450 DEG C for 30 minutes, and then cooled in air; the greenish powder is washed with deionized water and anhydrous ethanol for multiple times, and finally vacuum dried at 60 DEG C for 12 hours. The zirconium dioxide loaded iridium oxide material based on oxygen overflow stable tetragonal zirconia can be specially applied to an electrocatalyst for an oxygen evolution reaction in an acidic electrolyte, has excellent oxygen evolution reaction activity, follows a lattice oxygen mechanism in the reaction process, and can realize an oxygen overflow effect from tetragonal zirconia to iridium oxide nanoclusters to stabilize the catalyst.

The purpose of one aspect of the present invention is to provide fluorescent particles having excellent dispersibility. One aspect of the present invention relates to a fluorescent particle (100) having: a core particle (10A) with a first charge, the first charge being a positive charge or a negative charge; at least one polymer layer (12) and at least one fluorescent layer (11A, 11B) on the core particle, the polymer layer containing a polymer and carrying a second charge, the second charge being a positive charge or a negative charge; and a fluorescent layer containing metal nanoclusters (13) having fluorescent properties and carrying a third charge, the sign of which is opposite to that of the second charge.

This invention discloses a process for preparing ultrafine glass powder using a spray pyrolysis method in the field of glass encapsulation materials. The process first prepares a homogeneous solution A using boric acid, aluminum nitrate nonahydrate, alkaline earth metal nitrates, lithium acetate, sodium acetate, and potassium acetate. Tetraethyl orthosilicate is dissolved in anhydrous ethanol to obtain solution B. A rare earth transition metal composite oxide nanoclusters encapsulated with a silica shell hybrid inorganic modifier is dispersed in anhydrous ethanol to obtain suspension C. Solution B and suspension C are mixed, and deionized water and hydrochloric acid are added to adjust the pH. After pre-hydrolysis and cooling, triethyl borate is added dropwise for co-condensation, and then mixed with solution A. After adjusting the pH and aging, the mixture is ultrasonically atomized and spray pyrolyzed to obtain ultrafine glass powder. The glass powder obtained by this invention has small particle size, high sphericity, and can be continuously produced.

The invention relates to a gold nanocluster with controllable luminescence color and a preparation method and application thereof. The gold nanocluster is formed by combined action of TSA, chloroauric acid and zinc ions. The gold nanocluster prepared by the invention can show different luminous colors after being heated at room temperature and high temperature, and can be used for information encryption; meanwhile, due to the high-temperature-resistant characteristic, the material can also be used as a thermal trigger mark. The preparation method of the gold nanocluster is simple and low in cost; the detection means is simple and rapid and easy to observe; and repeated use can be realized.

The invention discloses a gas-phase white carbon black tail gas dechlorination process, which belongs to the technical field of tail gas treatment, and comprises tail gas pretreatment and particulate matter separation, germanium molecular sieve carrier preparation and modification, Fe-Cu bimetallic nano-cluster loading, dynamic pulsed electric field activation, dry-process dechlorination, wet-process reduction synergistic dechlorination and photo-thermal coupling regeneration. According to the method, the alkyl halide dehalogenase is introduced as a stabilizer, and the Fe3O4-CuO nano-cluster activated by the dynamic pulsed electric field is adopted, so that the reaction process is remarkably optimized, the alkyl halide dehalogenase and active components in the sodium thiosulfate solution form synergistic action sites, the selectivity and efficiency of sodium thiosulfate participating in the reaction are improved, and the reaction time is shortened. The consumption in a non-target reaction is avoided; according to the Fe3O4-CuO nano-cluster activated by the dynamic pulsed electric field, the chlorine removal efficiency is improved, and the usage amount of sodium thiosulfate is reduced, so that the consumption amount of sodium thiosulfate and the generation amount of waste liquid are synchronously reduced, and the high-cost investment of enterprises on waste liquid treatment and the risk of environmental protection compliance are reduced.

This invention relates to the field of electrochemical energy storage technology, providing an integrated solid-state battery module based on SiO2 aerogel powder and its preparation method. This battery module incorporates Janus-structured SiO2 aerogel powder with dual stress-thermal response capabilities to construct a synergistic interface system of stress buffering, ion conduction, and thermally triggered self-healing. The Janus powder forms a rigid core with ZrO2 nanoclusters and a SiO2 network, with a dynamic shell containing Diels-Alder dynamic covalent bonds grafted onto its outer surface and pore inner walls. A lithium salt-ionic liquid composite is loaded into the pores. A vertical columnar stress-supporting framework is formed through a transient liquid-phase assisted cold sintering process. Combined with a two-step thermally triggered self-healing treatment, stress buffering of electrode volume changes during charging and discharging, and interface self-healing in the early stages of thermal abuse are achieved. This invention significantly improves the interface stability, cycle life, and thermal safety of solid-state batteries, making it suitable for applications such as power batteries and high-capacity energy storage batteries.

The application provides a water-soluble gold nanocluster with a crystallographic structure and a preparation method thereof. The water-soluble Au 25 nanocluster with a single crystal structure is synthesized by using 2-mercaptonicotinic acid, 6-mercaptonicotinic acid or 6-mercaptobenzoic acid as a protective ligand, and the single crystal structure of the water-soluble Au 25 nanocluster is determined. The method in the application is simple, the reaction condition is easy to realize, and the gold nanocluster with a single crystal structure is obtained, and the accurate single crystal structure of the gold nanocluster is obtained, which is very important for analyzing the correlation between fluorescence and structure. The gold nanocluster Au 15 (2-Hmna) obtained by the application has near-infrared luminescence, the near-infrared has a deeper penetration into biological tissues, and has great application potential in the biomedical field.

An analyzer is disclosed for detecting and quantifying a glutaraldehyde (GLUT) composition in a water sample. The analyzer includes a peristaltic pump and a three-way valve, where the pump draws in a water sample comprising a GLUT composition through the 3-way valve. The analyzer also includes a 6-way valve that receives the water sample and a bovine serum albumin-coated gold (Au-BSA) nanoclusters reagent. The analyzer also includes: a debubbler that receive a mixture of the water sample and the reagent and removes bubbles from the mixture; and a reaction coil that receives the water sample and the reagent from the debubbler, such that they are reacted. The analyzer further includes a fluorescence flow cell that receives the reacted mixture; measures a fluorescence intensity of the Au-BSA nanoclusters in the mixture; and determines a concentration of the GLUT composition in the water sample based on the fluorescence intensity.

The invention discloses construction and application of a biosensor for triggering controlled release based on adjacent induced DNA strand displacement, and belongs to the technical fields of electrochemical luminescence, biological analysis and nano science. According to the invention, by integrating adjacent induced DNA strand displacement and controlled release strategies, the ultra-sensitive self-closing dual-mode biosensor taking the Au-Ag nanocluster as a luminous body is developed, and the ultra-sensitive self-closing dual-mode biosensor is used for trace detection of neuron-specific enolase. Due to the synergistic characteristic between the double metals, the Au-Ag nanocluster has high electrochemical luminescence (ECL) efficiency. Meanwhile, the reduction of S2O8 < 2-> is catalyzed by cyclic conversion between Fe < 2 + > / Mn < 3 + > and Fe < 3 + > / Mn < 4 + >, and a large amount of SO4 <-> is generated for ECL emission. The specific binding between the target antigen and the antibody can drive DNA strand displacement to open a blocked hole, so that the electrochemical probe falls off and the probe is quenched to release, the self-closing of an electrochemical signal and an ECL signal is realized, the detection sensitivity and accuracy of the sensor are effectively improved, and the sensor is suitable for immunoassay of various biomarkers.

The invention discloses application of gold nanoclusters in improvement of salt tolerance of cotton. According to the application, a solution containing the L-gold nanoclusters and / or the D-gold nanoclusters is applied to cotton roots or leaves. The concentration of the L-gold nanocluster in the solution is 0.001 to 0.01 mM; or in the solution, the concentration of the D-gold nanocluster is 0.003 to 0.008 mM. The gold nanocluster can well improve the fresh weight of the cotton under salt stress, can improve the chlorophyll content and photosynthesis of the cotton under salt stress, and can improve the oxidation resistance of the cotton under salt stress.

This invention relates to a mixed solvent-induced highly fluorescent silver nanoclusters, its preparation method, and its application in LEDs. These highly fluorescent silver nanoclusters are formed by the self-assembly of Ag6 in a mixed solvent of water and NMP through non-covalent interactions such as hydrogen bonding and π-π / π* interactions. Due to the restriction of ligand rotation and vibration, the silver nanoclusters exhibit significant fluorescence properties, with fluorescence intensity reaching 10⁻⁶. 7 The fluorescence lifetime is 11.77 μs and the quantum yield is 17.57%. The method for preparing high-fluorescence silver nanoclusters of the present invention is simple and inexpensive; when mixed with commercial phosphors, it can modulate white LEDs and can be used as a light conversion material for environmentally friendly WLEDs.

The application discloses a fluorescence analysis system for specific response to p-nitrophenol based on gold nanoclusters AuNCs@CFP, 200 muL of gold nanoclusters AuNCs@CFP, 500 muL of PB buffer solution with pH=10 and to-be-detected p-nitrophenol are diluted to 4 mL, the fluorescence intensity of the mixture is determined at an excitation wavelength of 334 nm after reaction at 45 DEG C for 50 min, the concentration of the to-be-detected p-nitrophenol is calculated according to the determined fluorescence intensity and a regression equation, the linear concentration range of the p-nitrophenol is 1.25-40 muM, the regression equation is F0 / F i =0.0258C+1.0003, F0 and F i are the fluorescence intensities of the mixture before and after the addition of the p-nitrophenol respectively, the correlation coefficient R 2 =0.9922, the detection limit LOD is 1.92 muM, the concentration of the p-nitrophenol is 25 muM, the relative standard deviation RSD is 1.13% in 11 repeated determinations. The preparation method of the gold nanoclusters AuNCs@CFP in the application is simple and easy to synthesize, and the fluorescence performance of the gold nanoclusters AuNCs@CFP is excellent.

The invention provides a V10-coated FeCo-MIL / BiVO4 composite photo-anode based on dissociation reconstruction interface strengthening as well as a preparation method and application of the V10-coated FeCo-MIL / BiVO4 composite photo-anode. According to the photoanode, BiVO4 loaded on FTO conductive glass serves as a substrate, V10 nanoclusters and a FeCo bimetal organic framework (FeCo-MIL) are synchronously loaded on the surface of the BiVO4 through a one-step solvothermal reaction, and a ternary composite structure is formed. The core innovation of the invention lies in that the composite photoanode is subjected to electrochemical activation treatment by adopting cyclic voltammetry subsequently, and FeCo-MIL is induced to generate controllable dissociation and dynamic reconstruction, so that strong interface interaction is constructed between FeCo-MIL and V10 and BiVO4, and an efficient charge transfer channel is formed. The material is simple in preparation process and low in cost, and shows excellent performance in the field of photoelectrocatalytic water decomposition. Under the irradiation of AM 1.5 G simulated sunlight and the potential of 1.23 V vs. RHE, the initial photocurrent density can reach 5.0 mA cm <-2 >, after cyclic voltammetry activation treatment, the photocurrent density is further increased to 5.8 mA cm <-2 >, the operation stability is enhanced, and the photoelectrocatalytic activity is remarkably enhanced.

The application discloses an ultrafiltration membrane for sewage treatment and a preparation method thereof, and relates to the field of membrane separation technology. The method comprises the following steps: firstly, ZnO@PHEMA-Ag nanoparticles are prepared, and the nanoparticles are pretreated, modified, grafted and loaded with silver nanoclusters; then, maleic anhydride grafted PVDF and modified MXene are prepared; then, a composite casting solution is prepared, and the solution is cast into a film and then immersed into a polyvinyl alcohol coagulation bath containing dimethylformamide to form a film; finally, the finished ultrafiltration membrane is obtained through ultraviolet crosslinking post-processing. The ultrafiltration membrane has excellent anti-pollution performance through functional nanoparticles, substrate modification and process optimization.

The invention discloses a dual-mode sensor for detecting putrescine in food as well as a preparation method and application of the dual-mode sensor. The dual-mode sensor (CDs / AuNCs) is composed of carbon dots (CDs) and gold nanoclusters (AuNCs), and putrescine can be rapidly and sensitively detected within 20 seconds. The interaction of putrescine and the sensor results in an increase in the fluorescence intensity of CDs at 430 nm and 525 nm, which is caused by the aggregation-induced emission (AIE) effect of CDs and the internal filter effect (IFE) of AuNCs. The detection limit of the CDs / AuNCs to putrescine in a ratio fluorescence mode is as low as 0.44 mu M, and the CDs / AuNCs has excellent selectivity and anti-interference performance. CDs / AuNCs also show good colorimetric linear response to putrescine, and the detection limit is 0.72 mu M. Finally, the CDs / AuNCs realizes rapid and accurate detection of putrescine in prawn meat by means of a smart phone, and shows the potential of food spoilage detection.

The application aims to provide an application of a ratio fluorescent probe based on gold nanoclusters / long afterglow nanorods in mercury ion detection, and belongs to the technical field of fluorescent detection, which comprises synthesis of gold nanoclusters, preparation of long afterglow nanorods, and preparation and application of the ratio fluorescent probe. The ratio fluorescent probe comprises red light emitting gold nanoclusters and green light emitting long afterglow nanorods, and the fluorescent emission of the two materials has obvious spectral and color distinction. The responses of the gold nanoclusters and the long afterglow nanorods to mercury ions are completely opposite, mercury ions can quench the luminescence of the gold nanoclusters, while the luminescence of the long afterglow nanorods is enhanced to a certain extent. The response difference of the two fluorescent signals to different concentrations of mercury ions is utilized, and the ratio processing of the fluorescent intensity can be used for ratio fluorescent detection of mercury ions, and obvious composite fluorescent color change can be observed under the same excitation light irradiation, which is convenient for visual analysis of mercury ions.

The invention belongs to the field of selective adsorbents, and particularly relates to a rubidium and cesium ion selective adsorbent based on a graphene composite material and application thereof.The rubidium and cesium ion selective adsorbent is prepared by conducting surface carboxyl activation and crown ether grafting on the surface of a three-dimensional cross-linked graphene skeleton to obtain a crown ether functionalized graphene composite material; and performing in-situ growth of copper ferrocyanide nanoclusters on the crown ether functionalized graphene composite material. The rubidium cesium ion selective adsorbent realizes efficient selective adsorption of Rb < + > and Cs < + >, reaches adsorption equilibrium within 30 min in simulated high-level liquid waste, has Cs < + > and Rb < + > saturated adsorption capacities of 185 mg / g and 142 mg / g respectively, and has excellent acid-base stability and electrochemical regeneration capacity.

This invention relates to a near-infrared low-potential electrochemiluminescence dual-ligand stabilized gold nanoclusters, their preparation method, and applications. The method uses chloroauric acid as the gold source and thiomalic acid and sodium citrate as reducing and stabilizing agents, respectively, in a two-step synthesis. First, Au is reduced online using thiomalic acid. 3+ Water-soluble gold nanoclusters were prepared using a novel method. These nanoclusters were then incubated with sodium citrate, and based on the ligand exchange principle, gold nanoclusters co-coated with thiomalic acid and sodium citrate were synthesized. The raw materials required for this invention are readily available and all possess good water solubility. The synthesis apparatus is simple, the conditions are mild, and the operation is safe. The resulting dual-ligand-coated gold nanoclusters exhibit good stability and produce low-potential near-infrared electrochemiluminescence in the long-wavelength region in an aqueous system. This overcomes the limitation of most current electrochemiluminescent materials requiring hydrazine hydrate or carbazide as a co-reactant. Using a non-toxic tert-butylamine-borane co-reactant, low-potential electrochemiluminescence radiation of 0.57V in the near-infrared region was generated.

This invention discloses an arginine-glycine-aspartic acid (RGD) peptide-modified chiral atomically precise metal nanoclusters, their preparation, and applications. The RGD peptide-modified chiral atomically precise metal nanoclusters consist of an atomically precise metal core, a chiral RGD peptide ligand layer, and linking molecules connecting the metal core and ligand layer. The chiral regulation and targeting functions of the RGD peptide-modified chiral atomically precise metal nanoclusters synergistically enhance their targeting and penetration at the tissue and cellular levels, thereby improving their uptake efficiency. After optimization with α... v The binding constant of β3 integrin is 1.4 × 10⁻⁶. ‑6 M ‑1 RGD peptides modify the ultrasmall metal cores of chiral atomically precise metal nanoclusters, endowing them with highly efficient and rapid renal clearance properties. This invention provides a solution suitable for various α-cell tumors, arthritis, liver fibrosis, and other conditions. v RGD peptides modified with chiral atomic precision metal nanoclusters, used to treat diseases with high expression of β3 integrin, can achieve efficient enrichment at target sites for imaging.

The application discloses a preparation method of metal and alloy nanoclusters, which comprises the following steps: S1, weighing a certain amount of N-heterocyclic-2-thione ligand and metal salt, dissolving in a proper amount of solvent, fully stirring, and uniformly mixing to obtain a corresponding metal complex; S2, continuously stirring, observing color change, and continuously reacting for a period of time to obtain a crude product; and S3, slowly evaporating in the dark to obtain a single crystal of the metal and alloy nanoclusters; and the application provides a simple, high-yield and good-crystallinity method for preparing metal and alloy nanoclusters by using N-heterocyclic-2-thione organic ligand.

The purpose of the present disclosure is to provide a titanium oxide composition, a coating composition, an antibacterial / antiviral fabric, and an antibacterial / antiviral film that exhibit excellent dark activity and high antibacterial / antiviral properties. The present disclosure is a titanium oxide composition that includes: rutile-type titanium oxide; and two or more copper atom-containing nanoclusters containing copper atoms and provided on the surface of the rutile-type titanium oxide. The titanium oxide composition contains, as the two or more copper atom-containing nanoclusters, a first nanocluster containing copper atoms and chlorine atoms.

The present application relates to a kind of polyoxovanadomolybdate nanoclusters and its preparation method and application.The chemical general formula of the polyoxovanadomolybdate nanocluster is Na6[V 10‑x Mo x O 28 ]·nH2O, wherein 1≤x≤4, n is the number of crystallization water, the value range is 8~12.The polyoxovanadomolybdate nanocluster provided by the present application is by Mo substitution part V atom in dodecanovanadate lattice, into lattice in substitutional doping form, on the basis of retaining parent body POV insulin-like activity, give treatment agent excellent antioxidant function, and through the combined action of antioxidant and insulin-like activity, realize the multiple regulation of diabetic wound microenvironment, promote wound healing.

The invention relates to the technical field of nano materials, in particular to a loadable oil-soluble cerium oxide nanocluster with an accurate structure and a preparation method thereof. The chemical formula of the cluster is shown in the specification, and the cluster is aryl or heteroaryl and is a pyridine ring substituent. The prepared oil-soluble cerium oxide nanocluster is accurate in structure, good in stability and good in carrier characteristic, nanoclusters such as Au9 (PPh3) 8 and the like can be stably loaded, the structure is still kept stable after loading, and the large-scale application requirements of catalysis, material modification and other scenes can be met. The preparation method disclosed by the invention is simple to operate, free of complex process steps, mild in reaction condition, free of high-temperature, high-pressure and other extreme environments and capable of being developed in a common laboratory. The used carboxylic acid ligand is a commercially available conventional reagent and is easy to purchase; the cerium precursor, the iodine source, the pyridine reagent, the solvent and the like are all common chemical and experimental raw materials, scarce or high-price consumables are avoided, and the industrialization cost is low.

The invention relates to the technical field of lithium battery negative electrode materials, in particular to a silicon-carbon composite material embedded with FeS nanoclusters as well as a preparation method and application of the silicon-carbon composite material. The silicon-carbon composite material provided by the invention comprises nano silicon and a carbon layer coated on the surface of the nano silicon, the carbon layer is a nitrogen and sulfur co-doped carbon layer; and FeS nanoclusters are embedded in the carbon layer. Wherein the carbon layer serving as a soft buffer layer can effectively relieve stress caused by volume expansion of the silicon negative electrode, and nitrogen and sulfur heteroatom doping can further improve the conductivity of the carbon material, so that charge transmission in the electrode is optimized. FeS is introduced to catalyze the delithiation reaction of Li15Si4 with relatively inert electrochemistry, the transmission speed of Li ions in a delithiation potential interval is maximally increased by 128 times, and the residual Li15Si4 is obviously reduced after charging is finished, so that the lithium loss capacity of the material caused by no lithium removal of Li15Si4 is greatly reduced, and the cycle performance is optimized.

The invention discloses a gold nanocluster, a preparation method of the gold nanocluster and application of the gold nanocluster in intracellular lysosome targeted imaging. The molecular general formula of the gold nanocluster is [Aux (PNP) 4Iy] X, wherein X is an anion group, x is equal to 10 or 13, and y is equal to 2 or 4. The gold nanocluster disclosed by the invention can overcome the defect that a large number of fat-soluble gold nanoclusters are generally and easily subjected to aggregation fluorescence quenching in cells, can normally emit light in a water-phase environment of the cells, and can realize effective imaging of targeted lysosome under the excitation of NIR-II.

This invention provides a high-transmittance UV ink and its preparation method, belonging to the field of novel ink preparation technology. This application proposes a high-transmittance, high-refractive-index UV ink system: by introducing an active zirconium-oxygen nanocluster solution and synergistically combining it with a side-chain flexible acrylic bisphenol A type epoxy resin prepolymer, a balance between refractive index and transparency is achieved; the zirconium clusters are generated under the stepwise coordination stabilization of acetyl acetoxyethyl methacrylate and methacrylic acid, and are stably dispersed into the curing system by replacing and removing low-boiling byproducts with a high-refractive-index monomer carrier, reducing agglomeration, whitening, and haze caused by powder dispersion; the flexible side chains slow down the curing shrinkage stress, reducing brittleness and microcracks, and improving coating integrity; the composite polymerization inhibitor and coordination buffer monomer reduce the tendency for storage thickening and microgel formation, which is beneficial for improving processing window and batch consistency; thus, a UV ink with high transparency, low haze, high refractive index, and stable film formation is obtained.

The invention relates to the technical field of nano material application and biomedical imaging, in particular to a near-infrared absorption gold nano-cluster, preparation of the near-infrared absorption gold nano-cluster and application of the near-infrared absorption gold nano-cluster in photoacoustic microscopic imaging. The near-infrared absorption gold nanocluster comprises Au60NCs and Au42NCs, the absorption peak of the Au60NCs is 1090 nm, the absorption peak of the Au42NCs is 785 nm, and the Au60NCs and the Au42NCs both have extremely strong absorption in a near-infrared region of 700-1700 nm, have low absorption characteristics at 532 nm and have water solubility. Au60NCs and Au42NCs can be applied to photoacoustic microscopic imaging, the Au60NCs are excited by adopting double wavelengths of 532 nm / 1064 nm, and the Au42NCs are excited by adopting double wavelengths of 532 nm / 808 nm; the Au60NCs and the Au42NCs are used for performing high-resolution three-dimensional visualization and quantitative analysis on a kidney microstructure in photoacoustic microscopic imaging.

This invention provides a multi-scale neighborhood synergistic catalyst, its preparation method, and its applications. The method uses nitrogen-doped carbon nanotubes (NCNTs) as a structural platform, achieving precise construction of Al diatomic sites through vapor-phase migration, trapping, and reduction fixation of volatile metal precursors. Furthermore, it combines secondary vapor-phase deposition to drive the surface deposition and nucleation of metal-containing Y species, resulting in in-situ growth into metal nanoclusters to obtain Al2-Y. NC / NCNT catalyst. In this catalyst, Al species are atomically dispersed and exhibit coordination unsaturation, while metallic Y is anchored to its neighboring interface in the form of nanoclusters. Both maintain a stable nearest-neighbor structure under the confinement and anchoring effect of carbon nanotube doping sites. The Al2 sites can regulate the selective adsorption configuration and electronic state of reaction intermediates, while the Y nanoclusters provide efficient hydrogen molecule activation and overflow hydrogen supply channels. Together, they lower the energy barrier of key hydrogenation steps and suppress excessive hydrogenation side reactions. This invention features mild conditions, a simple process, and exhibits excellent hydrogenation activity and selectivity.