26 results about "Plasmonic nanoparticles" patented technology

A material composition for purifying a fluid, the composition comprising a photocatalyst and nanoparticles of a non-oxidizing metal alloy, such as plasma nanoparticles. An article for purifying a fluid includes a substrate having a first surface opposite a second surface and a coating on one of the first surface and the second surface. The coating includes a photocatalyst and plasma nanoparticles. A system for purifying a fluid, the system comprising a housing defining a space, a light source removably coupled to the housing and configured to emit radiation at a predetermined frequency, a substrate positioned proximate the light source, the substrate comprising plasma nanoparticles configured to emit radiation at a predetermined frequency, and a space defined between the light source and the substrate and configured to receive a fluid.

Precursors for forming a plurality of multielement materials of different compositions can be deposited on different portions of a common substrate according to a combinatorial approach. The substrate can be subjected to a thermal shock, thereby converting the deposited precursors into separate multielement materials on the substrate. The thermal shock can be a temperature greater than or equal to 500° C. and a duration less than 60 seconds. In some embodiments, each multielement material can be tested with respect to an electrical property, a chemical property, or an optical property. Based on the results of the testing, a composition of a multielement material can be determined for use in a predetermined application, such as use as a catalyst, a plasmonic nanoparticle, an energy storage device, an optoelectronic device, a solid-state electrolyte, or an ion conductive membrane.

The present invention relates to the technical field of biochips and provides a DNA origami microarray biochip based on plasmon surface lattice resonance, comprising a chip substrate and arrayed DNA origami-plasmonic nanostructure-biomolecular probe units. A preparation method thereof comprises the following steps: extending a class A single strand from the DNA origami surface for grabbing and connecting plasmonic nanoparticles and biomolecular probes; then modifying the plasmonic nanoparticles and biomolecular probes with a class B single strand DNA that base-pairs complementary with the class A single strand; constructing hydrophilic array-arranged points on the substrate surface; connecting DNA origami to each point to form a microarray; and assembling biomolecular probes and plasmonic nanoparticles on the DNA origami through base-pairing complementary to form a plasmon-biomolecular probe microarray. The biochip can be customized for the detection of multiple or single pathogens, and the manufacturing method is economical and efficient, meeting personalized medical needs.

The application belongs to the technical field of two-dimensional metasurface, and discloses a plasmonic metasurface with low optical loss and low cost and a preparation method thereof. The plasmonic metasurface is composed of a substrate providing support performance and plasmonic nanoparticles with optical modulation capability. The preparation steps are as follows: S1, preparing an assembly master template; S2, preparing a sub-template by the master template in step S1; S3, synthesizing plasmonic nanoparticles; S4, assembling the plasmonic nanoparticles in step S3 on the surface of the substrate by the sub-template in step S2 to obtain the plasmonic metasurface. The application can solve the problems of large optical loss and high preparation cost of the current plasmonic metasurface, effectively improve the optical properties of the metasurface, and provide higher flexibility for the preparation of the plasmonic metasurface.

An endovascular system for targeted photothermal ablation of perivascular nerves is disclosed. A catheter includes a fluid lumen communicating with outlet orifices, and an electromagnetic radiation emitter positioned within a support structure that apposes the array against a vessel wall. A proximal console independently controls irradiation and injection parameters. In use, a nanofluid comprising plasmonic nanoparticles, such as gold nanorods tuned for near-infrared absorption, is injected into or through the vascular wall and subsequently irradiated intraluminally; the nanofluid absorbs energy and converts it to heat to ablate adjacent nerve fibers while reducing non-target tissue heating.

By utilizing eutectic gallium–indium nanoparticles for wastewater treatment of contaminated water, holes (h+) generated through photocatalytic reactions in which the nanoparticles absorb light of specific wavelengths such as ultraviolet or visible light cause oxidation reactions that cleave bonds between carbon (C) and hydrogen (H), while electrons (e-) generated by the photocatalytic reactions cause reduction reactions that cleave bonds between carbon (C) and fluorine (F). As a result, the invention provides the advantage of decomposing and defluorinating perfluorinated compounds. Details of the project that supported this invention are as follows. [Project Identification Number] 1711189578 [Project Number] 2022R1A2C1007071 [Department Name] Ministry of Science and ICT [Project Management (Professional) Institution Name] Korea Research Foundation [Research Project Name] Personal Basic Research [Research Project Name] Dynamic Analysis on Binding and Clustering of Plasmonic Nanoparticles Through Multi-Bond Interaction [Contribution Rate] 1 / 2 [Project Performing Institution Name] Korean Foreign Language University [Research Period] 01 March 2023 to 29 February 2024. Details of another project that supported this invention are as follows. [Project Identification Number] 1485019432 [Project Number] ARQ201901019005 [Ministry Name] Ministry of Environment [Project Management (Professional) Institution Name ] Korea Environmental Industry Technology Institute [Research Project Name] Development of New Technology for Water and Sewage Treatment [Research Project Name] Development of technology for evaluating and removing trace and new pollutants in an oxidation process in a water treatment process [Contribution rate] 1 / 2 [Project Performing Institution Name] Seoul National University [Research Period] 01 March 2023 – 31 December 2023

The invention relates to a mixed electrode containing plasmon nanoparticles and an electrolysis system containing the electrode. According to the mixed electrode and the electrolysis system comprising the electrode, the surface of a catalyst can be reactivated in an electrochemical reaction by means of a plasmon phenomenon by utilizing a plasmon-reactor combined electrode.

The invention provides a detection chip and a method for monitoring the healing state of a chronic wound in real time in vacuum sealing drainage. The preparation method comprises the following steps: S1, providing plasma nanoparticles; s2, preparing a PDMS mold on the silicon template with the micro-channel array, enabling the PDMS mold to be in close contact with a target base material, dripping plasma nanoparticles along the open end of the PDMS mold to obtain an assembly, and volatilizing a solvent in the assembly to obtain the SERS substrate; and S3, modifying the surface of the SERS substrate with a biological recognition element to prepare the detection chip. The detection chip provided by the invention has the characteristics of high sensitivity, good uniformity and stability and the like, and can effectively enhance the Raman signal of the physiological marker. The detection chip is detected by using a Raman spectrometer, so that the inflammation state and the internal potential infection condition information of the chronic wound surface difficult to heal can be accurately obtained in real time on the premise of not destroying the completeness of the closed dressing adopted by the negative pressure closed drainage, and support is provided for effective monitoring of the chronic wound surface.

Assemblies and methods for modulating (e.g., near) infrared radiation are provided. Exemplary assemblies include a composite material interposed between a first substrate and a second substrate. The composite material includes plasmonic nanoparticles (e.g., nanoplates) dispersed in a nematic liquid crystal.

In one aspect, the present disclosure pertains to methods of making various noble metal nanoprisms, e.g., gold nanoprisms. In various aspects, the methods can comprise incubating, under dark conditions, a growth solution comprising: (a) a plurality of gold seed structures; (b) a gold precursor, and (c) a photocatalytic intermediary, such that during the incubating step multiply-twinned gold seed structures in the growth solution are preferentially enlarged. The disclosed methods can comprise separating the multiply-twinned gold seed structures from the growth solution based upon the size of the gold seed structures to produce an enriched growth solution. In some aspects, the methods comprise irradiating the enriched growth solution to produce the gold nanoprisms. In some aspects, the disclosed nanoprisms comprise silver.

The invention discloses a preparation method of mesoporous plasmon nanoparticles and application of the mesoporous plasmon nanoparticles in an optical excitation gas sensor. The preparation method of the nanoparticles comprises the following steps: dissolving a gold-containing compound in water, adding a reducing agent, and heating for reaction to obtain a colloidal gold solution; adding water and a second reducing agent, and stirring to obtain a gold nanoparticle aqueous dispersion; adding an organic solvent, a surfactant and a pore expanding agent, emulsifying, adding a dopamine precursor, adjusting the pH to be alkaline to form a mesoporous polydopamine shell layer, and washing and drying; and finally, dipping in a tin-containing compound solution, and carrying out calcination treatment. The prepared mesoporous plasmon nanoparticles can be applied to preparation of optical excitation gas sensors. The sensor has high sensitivity and high selectivity response to NO2 gas, can stably work at room temperature, and shows excellent response performance to the NO2 gas concentration range of 0.2-10 ppm.

An odor-localizing autonomous air vehicle includes an airborne robotic platform having a navigation platform, a wireless transmitter communicatively coupled to a management console, and an olfactory sensor mounted on the airborne robotic platform that reacts to at least one olfactory odor. A controller is communicatively coupled to the airborne robotic platform, the navigation platform, and the biological sensor. The controller monitors the olfactory sensor. In response to the biological sensor detecting the at least one olfactory odor, the controller directs the airborne platform to three-dimensionally map an olfactory plume of the at least one olfactory odor using an olfactory-driven search pattern. The controller stores the three-dimensional map for later retrieval or transmits the three-dimensional map of the olfactory plume to the management console via the wireless transmitter. The olfactory sensor is a photonic crystal enclosure that contains plasmonic nanoparticles.

The invention discloses a method for coupling quantum dots and plasma nanoparticles and a strong coupling device, and the method is characterized in that the quantum dots and the plasma nanoparticles are connected through amido bonds to construct a composite system capable of realizing strong coupling. The quantum dots and the plasma nanoparticles are connected through amido bonds, the problem that in an existing quantum dot and plasma nanoparticle coupling method, reaction conditions are harsh is solved, the formed product structure is extremely stable, the reliability of a system is effectively improved, waste is reduced, and the environment-friendly requirement is met.

The application relates to the field of biotechnological analysis and detection, in particular to a method for analyzing protein kinase activity by using AuNPs coupled monomolecular fluorescence imaging; the method for realizing super-sensitive detection of protein kinase based on plasmonic nanoparticle coupled monomolecular dynamics fingerprinting is to use AuNPs as a substrate, fix other components for convenient observation, meanwhile, due to the addition of AuNPs, the surface plasmon effect of gold particles is used to enhance molecular fluorescence, improve detection signal and signal-to-noise ratio, break the limitation of imaging chain concentration, and accelerate the imaging speed; compared with a traditional amplification method, the background signal is greatly reduced, zero-background detection is basically realized, non-specific amplification is prevented, and false positive signals in the amplification process are avoided.

The present invention belongs to the technical field of green energy power generation, and discloses a preparation method and application of a water voltaic device with enhanced plasmonic effect. The preparation method includes: uniformly dispersing a conductive substrate material in a solvent and then treating it with a reducing agent to form a base material ink; using an additive and subtractive technique to prepare the base material ink into a three-dimensional structure with pores, and forming a stable substrate material through high-temperature treatment; immersing the stable substrate material in a plasmonic metal solution for a first preset time and then taking it out, then immersing it in a reducing agent solution for a second preset time and then taking it out, and using an additive and subtractive technique to cure it to form a water voltaic device with enhanced plasmonic effect. This preparation method constructs a three-dimensional bulk device with an interfacial pore structure through an additive and subtractive technique to improve the light absorption ability, and uses plasmonic nanoparticles to improve the light energy utilization rate, increase the device interface temperature, and provide additional carriers for the power generation process, which can improve the output power of the device.

An article is disclosed comprising one or more layers of plasma nanoparticles located between opposing dielectric material layers. A method for manufacturing an article having plasma nanoparticles is also disclosed.

A method of making an article comprising one or more layers of plasmonic nanoparticles located between opposing layers of dielectric materials and an article comprising one or more layers of plasmonic nanoparticles located between opposing layers of dielectric materials.

A method of making an article comprising one or more layers of plasmonic nanoparticles located between opposing layers of dielectric materials and an article comprising one or more layers of plasmonic nanoparticles located between opposing layers of dielectric materials.

Embodiments relate to compositions, methods, and systems designed to screen and detect antibodies for pathogen detection. Embodiments particularly relate to systems that utilize multilayered plasmonic nanoparticles for enhanced detection sensitivity. Embodiments further relate to systems designed to simultaneously detect treponemal and non-treponemal antibodies for syphilis diagnoses.

The invention discloses composite hydrogel, a preparation method thereof and application of the composite hydrogel in a solar seawater evaporator system, and belongs to the technical field of seawater treatment. The composite hydrogel provided by the invention comprises an evaporation base material and modified plasmon nanoparticles modified on the surface of the evaporation base material, the modified plasmon nanoparticles comprise plasmon nanoparticles and modified polyelectrolyte, wherein the surface of the plasmon nanoparticles is modified with the modified polyelectrolyte; the modified polyelectrolyte is a sulfydryl or N-heterocyclic carbene terminated polyelectrolyte. The prepared composite hydrogel can be applied to a solar seawater evaporator system, under the illumination condition, the plasmon nanoparticles and the polyelectrolyte grafted to the surfaces of the plasmon nanoparticles can synergistically activate water molecules, a thermodynamically unstable hydrogen bond network can be constructed, the solar water evaporation flux and the water recovery rate are remarkably improved, and the application prospect is wide. Moreover, efficient desalination can be realized, and good practical application potential is shown.

The present invention discloses a method for preparing a plasmonic nanoparticle Ag / Ag2S photocatalyst, comprising the following steps: S1. adding thioglycolic acid to water and vigorously stirring for 2 hours to obtain a mixed solution; S2. adding AgNO3 to the mixed solution and stirring for 2 hours to obtain a uniform mixture, followed by adding Na2S·9H2O and stirring for 1 hour to obtain a gray suspension; S3. centrifuging the suspension to obtain a precipitate a, which is then washed several times with ultrapure water and ethanol to obtain Ag2S; S4. dissolving the Ag2S in water, followed by in-situ reduction of silver sulfide with a sodium borohydride solution to obtain a precipitate b; S5. washing the precipitate b several times with ultrapure water and ethanol, and then drying at 60°C overnight to obtain the Ag / Ag2S photocatalyst. The present invention improves the photocatalytic activity of nanorod-shaped Ag2S by synthesizing Ag nanoparticles on the surface of Ag2S. Plasmonic nanoparticle Ag / Ag2S photocatalysts can be prepared at room temperature using a simple in-situ growth method.

Provided herein is technology relating to a method for selectively detecting a target analyte, such as environmental pollutants in a sample; a method of detecting surface-enhanced Raman spectroscopy (SERS) signals of a molecularly imprinted polymers (MIPs) matrix binding to a target analyte; a composition comprising a molecularly imprinted polymers (MIPs) matrix, wherein the MIP matrix comprises noble metal nanoparticles or hybrid plasmonic nanoparticles and an activated recognition cavity specific to a target analyte; and a method for in-situ manufacturing a molecularly imprinted polymers (MIPs) matrix comprising noble metal nanoparticles or hybrid plasmonic nanoparticles.

A quartz crystal microbalance (QCM) sensor is proposed. The QCM sensor comprises a piezoelectric substrate and at least two electrodes in contact with the substrate to induce shear deformations therein through the inverse piezoelectric effect. The substrate has a sensing surface, and, on that surface, a pattern of plasmonic nanoparticle accumulations protruding from the surface. Each accumulation of nanoparticles comprises a plurality of plasmonic nanoparticles arranged about a hump. Plasmonic hot spots are present between neighbouring accumulations of the pattern that are separated a distance that amounts to or to less than the average diameter of the accumulations of the pattern.

The present invention relates to a method for preparing a resin and nanocrystal compound, and a paint composition prepared using same and visible only in long-wavelength infrared rays, and, more specifically, to: a method for preparing a resin and nanocrystal compound, comprising mixing a transparent resin and manufacturing same into a light-absorbing device and the like through a process such as UV curing; and a special paint composition prepared using same, the composition comprising plasmon nanoparticles doped and dispersed so as to be unrecognizable in visible light range but visible in the long-wavelength infrared range.

A strain sensor according to the present invention comprises: a photo-alignment layer comprising photo-aligned magnetoplasmonic nanoparticles; and an elastic film layer, wherein the magnetoplasmonic nanoparticles comprise a silver (Ag) core and an iron oxide shell.

The invention relates to a preparation method of in-vitro color vision correction wearable equipment, which comprises the following steps of: accurately determining a color weakness / color blindness type by adopting triple verification of image measurement, a color vision correction simulation model and a naturalness evaluation index, and outputting a spectral line of an optical filter according with a color vision disorder condition by utilizing a naturalness and contrast evaluation system; constructing a PDK file between the spectral parameters of the nanoparticles and the structure and process parameters; the method comprises the following steps: establishing a reverse design scheme for synthesizing multi-component plasmon nanoparticles by adopting a gradient descent algorithm and a neural network algorithm, and providing spectral parameters of each component nanoparticle; and constructing a PDK file self-assembled by the nanoparticles, and providing customized full-process design for visual correction by combining the structure parameters and the process parameters of the target nanoparticles obtained by the process. According to the method, through the wearable filter, the image and color recognition capability of the individual patient watching the public display screen is directly changed, and patient-oriented differentiation and customization of low-cost color vision correction wearable equipment are realized.