63 results about "Circular dichroism" patented technology

The invention provides an optical module, a debugging method and optical equipment. The optical module comprises a display panel, a first cholesteric liquid crystal film, a first electric control dimming device and a second cholesteric liquid crystal film, the first cholesteric liquid crystal film is arranged on the light emitting side of the display panel, the second cholesteric liquid crystal film and the first cholesteric liquid crystal film have the same circular dichroism, and the second cholesteric liquid crystal film and the first cholesteric liquid crystal film are configured to reflect polarized light with the same rotation direction as the first cholesteric liquid crystal film and transmit polarized light with the rotation direction opposite to the first cholesteric liquid crystal film; the first electric control dimming device is configured to be time division multiplexing, can convert the transmitted polarized light into polarized light with opposite rotation directions in a power-off state, and maintains the polarization state of the transmitted polarized light in a power-on state. According to the optical module, when the polarized light is transmitted and reflected at the first cholesteric liquid crystal film and the second cholesteric liquid crystal film and is emitted from the first electric control dimming device in different polarization states, light loss cannot be generated, and the light emitting brightness and the imaging quality of the optical module can be guaranteed.

Provided are a non-ribosomal antifungal peptide MaAFP1, a preparation method therefor and a use thereof. The molecular formula of the antifungal peptide MaAFP1 is C41H74N18O12, wherein an amino acid sequence from the N-terminus to the C-terminus is (D)Arg-(L)Arg(OH)-(D)Orn-(L)Thr-(D)Orn-(L)Arg(OH)-(D)Tyr. Fermentation is performed by using Metarhizium anisopliae CQMa421, a fermentation broth is collected, and separation and purification are performed by means of ion exchange chromatography and high performance liquid chromatography so as to obtain the antifungal peptide MaAFP1. The structure of MaAFP1 is analyzed by comprehensively using an Edman degradation method, mass spectrometry, infrared spectroscopy, nuclear magnetic resonance spectroscopy, and circular dichroism spectroscopy. By performing an in vitro bacteriostatic test, it is found that MaAFP1 has a good inhibitory effect on a variety of animal and plant pathogenic fungi, and has the value of the development of a novel antibacterial drug.

The application provides a Fe3O4 nanoparticle microscopic imaging detection method based on left and right polarization modulation, belongs to the technical field of photothermal science and detection and signal processing, and solves the problems that current nanometer single particles are difficult to observe and physical and chemical characteristics are difficult to obtain, and specifically comprises the following steps: determining a sample to be detected and preparing a slide sample; starting a computer, a data acquisition card, a lock-in amplifier, a galvanometer controller and a function generator; starting a power supply of an excitation light and a detection light laser and a refrigerator; setting detection parameters, setting laser power / current parameters, setting modulation parameters, and scanning and detecting the sample to be detected; loading a magnetic field; reading signals from the data acquisition card by the computer to obtain a photothermal detection result image; changing different laser parameters and the size of the magnetic field, repeating the above steps, obtaining a circular dichroism and magnetic circular dichroism detection result, measuring a magnetization curve, and monitoring a single nanoparticle magnetic moment flipping process.

The invention discloses a tunable narrow-band chiral metasurface based on a silicon and germanium-antimony-tellurium composite nanostructure. The tunable narrow-band chiral metasurface comprises a substrate and a silicon and germanium-antimony-tellurium composite chiral metasurface formed on the surface of the substrate, the surface of the silicon and germanium-antimony-tellurium composite chiral super-structure comprises a plurality of silicon and germanium-antimony-tellurium composite chiral nano-structures which are periodically arranged, and each chiral nano-structure is composed of two rectangular nano-rods which are vertically connected and is in an L shape; the silicon and germanium-antimony-tellurium composite chiral nanostructure is a germanium-antimony-tellurium and silicon double-layer chiral nanostructure from bottom to top. The silicon and germanium-antimony-tellurium composite chiral super-structure surface disclosed by the invention can realize narrow-band circular dichroism response in an infrared band, and the wavelength of the narrow-band circular dichroism response can be dynamically adjusted through germanium-antimony-tellurium phase change.

The application discloses a method for detecting glutathione by using manganese-based chiral nanomaterials, and belongs to the field of chemical engineering, specifically to the field of analytical chemistry technology. The method comprises the following steps: taking a dispersion liquid of manganese-based chiral nanomaterials as a detection reagent, mixing the detection reagent with a sample containing glutathione to be detected, and comparing a circular dichroism spectrum signal with a standard curve to obtain the concentration of the sample containing glutathione to be detected; wherein a chiral ligand of the manganese-based chiral nanomaterials is ribose. Based on the circular dichroism spectrum detection, the detection wavelength band used is in the visible light region, is not easy to be disturbed, is sensitive, and the resolution can reach 3 muM, and the detection limit is 1.5 muM, which has important significance and value for promoting the development of the fields of optics, life science, medicine and the like.

The invention discloses a multi-mode circular dichroism chiral metasurface design based on an adjustable material. The metasurface structure is composed of a thermal phase change material VO2 and an electric phase change material Dirac on the upper layer, a polyimide dielectric layer in the middle and a gold substrate. The provided circular dichroism chiral metasurface can achieve regulation and control of the transmissivity and the reflectivity within the frequency band of 0.6-0.8 THz, and then the reflection circular dichroism is effectively controlled. The maximum value of the reflection circular dichroism of the metasurface can reach 0.69, the minimum value of the reflection circular dichroism of the metasurface can be close to 0, and regulation and control functions under four working modes are achieved. By changing the conductivity of the thermal phase change material VO2 and the electrical phase change material Dirac, dynamic regulation and control of four circular dichroism states are realized.

The application discloses strigasiaticaside A and an extraction method and application thereof, and finds, through chemical component research on the whole grass of striga asiatica, a new synbinaphthyl tetrahydrofuran lignan glycoside, that is, strigasiaticaside A, identifies the chemical structure of the new compound through nuclear magnetic resonance, mass spectrometry, ultraviolet, infrared and circular dichroism spectrum technology.The structure of the new compound is identified as (-) sesamin-5-O-beta-D-glucopyranoside.The anti-hepatitis activity of the new natural product is evaluated by using LPS stimulated HepG2 cells.The results show that when the concentration is 100 muM, the compound has a significant inhibitory effect on the production of inflammatory factors IL-10 and NF-kappa B protein, and has no cytotoxicity, indicating that the compound may have potential anti-hepatitis activity.

The application provides a chiral metasurface optical device, a preparation method thereof and an ultrafast circularly polarized light modulation method, the chiral metasurface optical device comprising a substrate and a chiral oligomer nanosuper surface structure arranged on the substrate, the chiral oligomer nanosuper surface structure being formed by a plurality of short-range ordered distribution of structural identical metal nanometer units; the metal nanometer unit comprises six metal nanometer discs, and the centers of the six metal nanometer discs are located on the circumference of a same circle; the structural chiral characteristic is introduced through the circularly distributed metal nanometer discs, the structure is simple, and the circularly polarized light modulation capacity is strong; through the combination of an excitation light source and a detection light source, the optical characteristic of the chiral metasurface optical device is excited on an ultrafast time scale, and a transient circular dichroism signal is realized; by changing the incident direction of the excitation light source and the detection light source, the sign of the transient circular dichroism signal can be reversed, and the chiral metasurface optical device has an ultrafast response time and a relaxation time.

A circularly polarized light irradiator capable of high-speed and high-sensitivity circular dichroism measurement is provided, as well as an analytical apparatus and microscope using the circularly polarized light irradiator. The analytical apparatus and microscope using the circularly polarized light irradiator include: a light source (20) that emits pulsed light; a polarization separation unit that separates the pulsed light (L1) emitted from the light source (20) or linearly polarized light (L2) extracted from the pulsed light (L1) emitted from the light source (20) into an x-axis polarized light component (L2x) and a y-axis polarized light component (L2y); and a light delay unit (13) that delays the pulsed light of the separated x-axis polarized light component. The pulses (Px) and (Py) of the y-axis polarized light components are delayed relative to the other; the polarization light combining unit coaxially combines the X-polarized pulse beam (L2x) and the Y-polarized pulse beam (L2y) emitted from the light delay unit (13) to generate a linearly polarized beam (L3) with alternating repeating X-polarized light pulses (Px) and Y-polarized light pulses (Py); and the polarization light conversion unit converts the linearly polarized light emitted from the polarization light combining unit into circularly polarized light.

The invention relates to the technical field of micro-nano optics and optical detection, and discloses a chiral super-structure surface and a method for realizing high circular dichroism chiral switching based on humidity regulation and control. The method comprises the following steps: designing a hook-shaped chiral super-structure surface, and paving polyvinyl alcohol hydrogel on a silicon nano brick structure; the volume expansion and refractive index change of the hydrogel along with the humidity change are utilized to realize the regulation and control of the optical response of the super-structure surface; in the process that the relative humidity is from 20% to 42%, the thickness of the hydrogel film layer is increased, the refractive index is reduced, circular dichroism blue shift is caused, the normalized circular dichroism value is switched from-0.8 to + 0.8 in the visible light range, and the bandwidth of the blue shift is about 8 nm. The chiral metasurface structure has the advantages of being high in integration level, excellent in reversibility and good in stability, can be applied to the fields of circular dichroism optical recognition, humidity sensing, dynamic optical information storage and the like, and provides a technical approach for design and implementation of a dynamic integrated optical system.

The application discloses a kind of chiral iron-based nanowires and its preparation method, belong to nanometer material synthesis technical field.The method includes the following steps: the mixture containing iron source, chiral ligand, polyhydric alcohol solvent, base, amine reducing agent is alkaline aqueous solution, reaction, obtains the chiral iron-based nanowires;Chiral ligand is selected from L-cystine and / or D-cystine.This application method is simple, and the morphology of product is uniform, easy to realize large-scale preparation, the two iron-based nanowires of L and D configuration synthesized are all in ultraviolet-visible light region Good circular dichroism spectrum symmetry, for preparing having enantiomeric chiral nanometer material and researching chiral small molecule induced chiral nanometer material synthesis has guiding significance.

The application discloses a manganese-based chiral enantiomeric nanowire and a preparation method thereof, and belongs to the technical field of nanometer material synthesis. The method comprises the following steps: placing a mixture alkaline aqueous solution containing a template agent, a manganese source, a chiral ligand and an alkali in a closed container, and reacting to obtain the manganese-based chiral enantiomeric nanowire. The chiral ligand is selected from L-histidine and / or D-histidine; and the template agent is selected from a cationic surfactant. The two manganese-based superparticles of L and D configurations synthesized in the application have good chiral optical activity in a visible light region, circular dichroism spectrum presents very good symmetry, and the method has important research significance for preparing enantiomeric chiral nanowires by using a surfactant as a template and for researching a chiral ligand-induced chiral nanometer material assembly mechanism.

The invention provides chiral spiral polyisocyanide with a sulfonamide structure as well as a preparation method and application of the chiral spiral polyisocyanide, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: carrying out nucleophilic fluorine exchange reaction on chiral alpha-phenylethylamine and sulfonyl fluoride isocyanide to prepare a sulfonamide modified isocyanide monomer, and initiating the activity of the monomer by adopting a nickel / palladium catalyst to carry out polymerization reaction, thereby preparing the chiral spiral polyisocyanide with a sulfonamide structure. The chiral spiral polyisocyanide with the sulfonamide structure has excellent stability and anti-interference capability, has high specificity to fluorine anions, generates macroscopic color change under visible light, disappears circular dichroism spectrum signals, and has wide application prospects in the field of fluorine ion recognition and detection.

The invention discloses a chiral metasurface construction method based on rotation transformation, a metasurface device comprises a substrate and a chiral metasurface located on the substrate, and the chiral metasurface is a rectangular nanorod array arranged periodically. The metasurface unit is composed of rotating rectangular silicon nanorods, and selective regulation and control of spin angular momentum of incident light are achieved by introducing in-plane mirror symmetry of a geometric rotation destroying structure. Simulation results show that the metasurface shows remarkable circular dichroism at the resonant wavelength of 633 nm, the transmissivity of the metasurface to left-hand circularly polarized light reaches up to 73%, and meanwhile the transmissivity of right-hand circularly polarized light is restrained to 2%. The device has the advantages of compact structure, easiness in integration and the like, and is expected to provide an effective solution for chiral biosensing application.

This invention relates to a chiral device for identifying enantiomers of amino acids, which can be used to distinguish different enantiomeric configurations of the same amino acid. Light is incident from a substrate along the z-direction, passing sequentially through a glass substrate and a gold nanorod composite structure. The gold nanorod composite structure consists of a double L-structure and disjointed tandem nanorods, making full use of gaps and structural asymmetric absorption to achieve a circular dichroism signal of 0.147 in the near-infrared 0.6–1.7 μm band. The refractive index sensitivity at the peak of the circular dichroism spectrum can reach 324 nm / RIU, enabling the identification of amino acid enantiomers.

The invention belongs to the technical field of medicine, and particularly discloses an amide alkaloid compound as well as a preparation method and application thereof.The amide alkaloid compound is prepared by extracting fructus piperis longi with an organic solvent, extracting, concentrating and drying. And then separating by three to four methods of normal phase silica gel column chromatography, reverse phase silica gel column chromatography, gel column chromatography and chiral high performance liquid chromatography to obtain fourteen new amide alkaloid monomeric compounds. Fourteen compounds are determined to be new amide alkaloid compounds through high-resolution mass spectrum, nuclear magnetic resonance spectrum, circular dichroism spectrum and quantum chemistry means, and structural identification is carried out on the amide alkaloid compounds. In addition, in-vitro hypoglycemic, anti-tumor and anti-inflammatory activity determination is carried out on the fourteen amide alkaloid compounds, and results show that the amide alkaloid compounds have hypoglycemic, anti-tumor and anti-inflammatory activity and can be used for hypoglycemic, anti-tumor and anti-inflammatory drugs.

The invention provides a strong circular dichroism chiral metasurface device with an open three-arc ring structure. A single periodic structure is composed of a copper substrate 1, a TOPAS dielectric layer 2, a small-opening arc-shaped copper ring 3 and two large-opening arc-shaped copper rings 4 which are the same in size from bottom to top in sequence. The large opening arc-shaped copper rings and the small opening arc-shaped copper rings in the structure strongly react to incident circularly polarized light to form very high circular dichroism, and the circular dichroism can be changed by changing the period of the unit structure, the thickness of the TOPAS layer and the size of the opening arc-shaped copper rings, so that the circular dichroism peak height can be adjusted. The structure has potential application prospects in the fields of tunable dynamic imaging and other communication.

The application belongs to the technical field of photoelectric functional materials, and particularly relates to a Y-based organic semiconductor material containing intrinsic chirality and a preparation method and application. The Y-based organic semiconductor material containing intrinsic chirality provided in the application creatively introduces a chiral side chain into a dithiophene beta position of a Y-based non-fullerene acceptor molecule in a preparation process, simultaneously introduces chiral alkyl side chains into the dithiophene beta position and a pyrrole N position, has four chiral sites, can realize high circular dichroism absorption and light emission characteristics, and has a low HOMO energy level, which is beneficial to realizing efficient charge transport and photo-generated carrier migration. When used as an active layer material of a photoelectric device, the Y-based organic semiconductor material can make the chiral asymmetric response of the photoelectric device good, and prepare a low-power-consumption and high-selectivity photoelectric device, and is a high-performance Y-based organic semiconductor material. Thus, the technical problem of lack of high-performance Y-based organic semiconductor materials in the prior art is solved.

The application relates to a method for preparing a circularly polarized optical film by using gold nanorods and polyurethane Vitrimer (PUV), and belongs to the field of polymer inorganic nanocomposites. The method uniformly and stably disperses the water-phase-synthesized gold nanorods in a PUV monomer solution through a three-step phase transfer method, utilizes the crystallinity of the PUV to guide the regular arrangement of the gold nanorods, and makes the gold nanorod-PUV composite have circular dichroism (CD), so that the gold nanorod-PUV composite can be used as a novel circularly polarized film. The method is simple and universal, simplifies an existing scheme for generating circularly polarized light, and provides a novel method for preparing a circularly polarized optical film.

The application discloses a method for simultaneously and dynamically measuring two-dimensional distribution of optical activity and circular dichroism of a chiral sample by using circularly polarized object light wave digital holography. The method utilizes the modulation characteristics of left and right circularly polarized light amplitude and phase of the chiral sample, and the full-field, non-contact and high-precision dynamic measurement advantages of digital holography on the complex amplitude distribution of the light field. Left and right circularly polarized light is taken as object light wave respectively, and the simultaneous and dynamic measurement of the two-dimensional distribution of optical activity and circular dichroism of the chiral sample can be realized by using double-exposure digital holography.

The invention provides a chiral manganese dioxide nanoparticle and a preparation method and application thereof. The chiral manganese dioxide nanoparticle having good biocompatibility is prepared by taking D-gluconic acid as a ligand. The chiral manganese dioxide nanoparticle of the present invention has a strong circular dichroism signal in a visible light region, so that interference of signals in a small molecule ultraviolet region in an organism can be avoided; and by means of the redox reaction with ROS, change in the circular dichroism signal intensity of the chiral manganese dioxide nanoparticle presents a good linear relationship with the concentration of ROS, so that the quantitative detection of ROS is achieved. The chiral manganese dioxide nanoparticle prepared in the present invention can effectively remove ROS in aged skin, increase dermis thickness and collagen proportion, and reduce the oxidative stress level in skin tissue, and is beneficial to delaying skin aging.

The invention provides a protein purification analysis method based on optical detection and an artificial intelligence system, which relates to the technical field of artificial intelligence, and comprises the following steps: injecting a protein sample to be analyzed into a chromatographic separation system for purification treatment; a four-channel parallel light path structure is adopted to collect multi-dimensional spectral data such as absorbance, fluorescence intensity, light scattering intensity and circular dichroism spectrum signals in real time, and crosstalk between channels is eliminated by using a self-adaptive signal compensation algorithm; inputting the compensated multi-dimensional spectral data into a pre-trained deep neural network model, extracting spectral features and time sequence features through a convolution layer and a circulation layer, and generating a purified feature vector; and on the basis of the vector, a layered reinforcement learning method is adopted to carry out real-time optimization adjustment on process parameters such as flow velocity, gradient, pH value and the like of the chromatographic separation system. According to the invention, accurate monitoring and intelligent control of the protein purification process can be realized, and the purification efficiency and the product quality are improved.

The application discloses a kind of shell regulation discrete chiral gold core silver shell nanomaterial and its preparation method, method includes the following steps: using anisotropic gold nanorod material, into which adding surfactant, cysteine, ascorbic acid, chloroauric acid solution is reacted, discrete chiral gold nanorod with strong plasmonic circular dichroism response is obtained;Then after centrifugation and purification concentration, adding cysteine, silver nitrate, ascorbic acid, secondary reaction is carried out to chiral gold nanorod.The scheme reaction condition is mild, easy to operate;And the discrete chiral gold core silver shell nanoparticles obtained is very good, single nanoparticle, with strong PCD signal, and chiral silver shell can amplify and reverse the chirality of chiral gold core, very suitable for biological sensing, basic research (such as surface chemistry and PCD mechanism research) etc..

The application discloses a dark-field thermal wave confocal microscopic measuring device based on circular dichroism, which comprises the following steps: a time division multiplexing circular polarized light generating light path alternately generates left-handed circular polarized light and right-handed circular polarized light in the same period as thermal wave detection light; a thermal wave detection light shaping light path shapes the thermal wave detection light; a thermal wave pump light generating light path generates thermal wave pump light, and after the thermal wave pump light is modulated, the thermal wave pump light is combined with received thermal wave detection light to obtain combined light; a light beam illumination light path irradiates the combined light to a sample to be measured, and receives thermal wave reflection and scattering light; a dark-field balanced detection light path receives the shaped thermal wave detection light, extracts the scattering light of the thermal wave detection light in the thermal wave reflection and scattering light, and obtains a circular dichroism thermal wave dark-field signal according to the difference frequency signal between the reference light and the scattering light of the thermal wave detection light. The application can obtain the chiral information of various physical properties and micro-nano structures of sample defects.

This invention discloses a microfluidic-based polypeptide-based helical fiber with circularly polarized luminescence and its preparation method, belonging to the field of nanotechnology. Utilizing multiple hydrogen bonding interactions between polypeptides and based on the solute conformational confinement and ordered solvent diffusion mechanism of a microfluidic laminar flow chip, this invention develops a polypeptide-based circularly polarized luminescent material with excellent luminescence performance. Circular dichroism spectroscopy and circular polarization spectroscopy tests show that the helical fiber material obtained by this invention exhibits mirror-symmetric signals. Compared with materials obtained by traditional solution stirring, the polypeptide-based helical fibers prepared in the microfluidic chip by this invention not only have a more uniform morphology but also a larger... g lum value( L -Peptide / TBI and D The luminescence asymmetry factor of -Peptide / TBI is ±1.9×10⁻⁶. ‑3 Furthermore, this method has a certain degree of universality and is applicable to the assembly of other macromolecules, including polymers, nucleic acids, and proteins.

The invention relates to the technical field of electromagnetic wave regulation and control, and provides a depth-adjustable quasi-continuous domain bound state electromagnetic wave polarization controller based on multiple defects, and the electromagnetic wave polarization controller sequentially overlaps a substrate and a chiral sub-wavelength structure unit array with the refractive index lower than that of the substrate; the chiral sub-wavelength structure unit array is composed of a plurality of dielectric structure units, a main body of each dielectric structure unit is a rectangular block, a cubic chiral cavity is formed in each of the opposite angles of the upper top surface of the rectangular block, and the upper top surfaces of the chiral cavities are flush with the upper top surface of the rectangular block; the ratio of the height of the chiral cavity to the total height of the dielectric structure unit is 1 / 4-1; cubic positions and shapes of the chiral cavities of the dielectric structural units in the chiral sub-wavelength structural unit array are periodically repeated. The device has the capability of converting incident circularly polarized light into opposite chiral circularly polarized light, and particularly, the circular dichroism intensity and conversion efficiency of the device are superior to those of an existing achiral or simple symmetric broken quasi-continuous domain bound state structure.

This invention belongs to the field of pharmacology and provides the application of demethoxycurcumin and phlorizin in the preparation of drugs that inhibit β-lactoglobulin glycosylation. The synergistic inhibitory effects and mechanisms of demethoxycurcumin and phlorizin on AGEs were systematically investigated. Fluorescence spectroscopy and carbonyl / thiol / amino group assays confirmed that demethoxycurcumin and phlorizin can synergistically inhibit β-lactoglobulin glycosylation at appropriate concentrations. Circular dichroism spectroscopy and other experiments showed that the combined use of the two can better alleviate protein secondary structure changes and aggregation. They competitively bind to the same glycosylation site, synergistically resist oxidation, thereby inhibiting AGEs formation, and synergistically reducing oxidative stress, cell damage, and apoptosis at the cellular level. Therefore, the combined application of these two drugs has potential therapeutic value in intervening in diabetic complications.

A kind of circularly polarized chiral organic fluorescent light emitting material and its preparation method and application belong to the technical field of design, preparation and application of chiral polymer functional materials.The chiral binaphthyl compound R / S-2 prepared as chiral monomer is coupled with the monomer of fluorenyl chromophore group with single bond, double bond and triple bond connector to prepare three intrinsic chiral polymer functional fluorescent light emitting materials R / S-P1, R / S-P2 and R / S-P3 with different conjugated main chain conformations by Suzuki, Heck and Sonogashira coupling polymerization reaction, and their photophysical properties and chiral luminescence performance in thin film state are studied.The experiment proves that the product prepared by the application embodies the controllable photophysical properties in test, and has certain circular dichroism and circularly polarized luminescence properties, indicating that it is expected to be applied in the field of chiral solid-state display material and optoelectronic device.

The present application belongs to the field of artificial super material, and relates to a polarization control super surface, in particular to a broadband infrared polarization control super surface based on chiral structure design. The present application adopts two intersecting cuboid Si strips to construct a chiral unit structure, and arranges the chiral unit structure on a SiO2 substrate in a periodic manner to form a chiral super surface array. Circularly polarized waves with different rotation directions are vertically incident to observe the circular dichroism of the chiral super surface array. Linearly polarized waves with different polarization angles are vertically incident to calculate the ellipticity of the reflected wave, so as to verify the linear-circular polarization conversion capability of the super surface. The infrared polarization control super surface of the present application can be adjusted by parameters such as unit period, length, width and height of the two cuboids, and relative rotation angle, so as to optimize the circular dichroism performance of the chiral super surface, and to control and expand the bandwidth of the polarization conversion, and has multiple degree-of-freedom adjustment characteristics.

The application provides a preparation method and application of a nano-flower-shaped chiral BaTiO3 / BaCO3 photocatalytic material. The preparation method is simple in operation and does not need complex reactions and reagents in multiple steps. The chiral nano-flower composite material synthesized by a solvothermal method has a strong and symmetrical circular dichroism (CD) signal, is obvious in flower shape, large in specific surface area, has excellent circularly polarized light selective absorption capacity, and can be better applied to the field of asymmetric photocatalysis, such as degradation of organic pollutants under circularly polarized light, and shows obvious enantioselectivity.