12 results about "Nanostructure" patented technology

A portable sensor device incorporates a low-power, nanostructure sensor coupled to a wireless transmitter. The sensor uses a nanostructure conducting channel, such as a nanotube network, that is functionalized to respond to a selected analyte. A measurement circuit connected to the sensor determines a change in the electrical characteristic of the sensor, from which information concerning the present or absence of the analyte may be determined. The portable sensor device may include a portable power source, such as a battery. It may further include a transmitter for wirelessly transmitting data to a base station.

Highly luminescent nanostructures, particularly highly luminescent quantum dots, comprising a nanocrystal core and thick shells of ZnSe and ZnS, are provided. The nanostructures may have one or more gradient ZnSe_xS_1-x monolayers between the ZnSe and ZnS shells, wherein the value of x decreases gradually from the interior to the exterior of the nanostructure. Also provided are methods of preparing the nanostructures comprising a high temperature synthesis method. The thick shell nanostructures of the present invention display increased stability and are able to maintain high levels of photoluminescent intensity over long periods of time. Also provided are nanostructures with increased blue light absorption.

A nano-class magnetic particle-palygorskite composition, which can be magnetically controlled and used for cleaning raw materials, water, air, sewage, etc and preparing target medicines, is composed of palygorskite crystals and magnetic nanoparticles carried by said palygorskite crystal. It is prepared from palygorskite clay through suspending in water, adding Fe salt solution, hydrolytic reaction, dewatering, washing, and reductive calcining.

The invention provides a method for preparing flowerlike nanometer cobalt by using electro-conductive glass FTO, an anodised aluminum template (AAO) and an aqueous high-molecular adhesive as a combined electrode. The method comprises the following steps: (1) preparation of a working electrode: a step of coating the electro-conductive glass with a solution of the aqueous high-molecular adhesive--polyvinyl alcohol (PVA) through spin coating and bonding the anodised aluminum template so as to obtain the FTO/PVA/AAO combined electrode; (2) preparation of an electrolyte: separately preparing cobaltous sulfate and a boric acid solution and mixing the cobaltous sulfate with the boric acid solution; (3) electrodeposition reaction: a step of carrying out constant-voltage electrodeposition on the combined working electrode; and (4) post-treatment: a step of soaking the working electrode having undergone electrodeposition in sodium hydroxide to remove the anodised aluminum template. According to the invention, FTO/PVA/AAO is used as the combined working electrode and constant-voltage electrodeposition is carried out so as to prepare the novel flowerlike nanostructured cobalt; and the method is simple and fast and has the advantages of mild reaction conditions, short time, high efficiency and no need for high temperature and high pressure conditions compared with conventional methods.

The invention discloses a three-dimensional material based on a copper sulfide lamellar structure and a preparation method thereof. The material comprises copper sulfide nano sheets which grow perpendicularly to a foam copper skeleton, and the diameter of the copper sulfide nano sheets is 5-8 micrometers. The material is characterized in that foam copper is used as a substrate skeleton material, and the copper sulfide lamellar nano structure is perpendicularly grown on the surface of the foam copper. The preparation method comprises the following steps: dispersing sulfur powder into methanol,adding the foam copper into the prepared sulfur powder methanol dispersion liquid, placing the obtained material in a reaction kettle, and keeping a temperature of 60-90 DEG C for 3-6h. The copper sulfide lamellar structure provided by the invention has the advantages of a simple preparation process and high catalytic activity, thus the three-dimensional material based on the copper sulfide lamellar structure has potential application prospects in the fields of photocatalysis, catalyst carriers, electrochemical hydrogen storage and the like.

The invention discloses a synthesis method for a porous ZnCo2O4 nanosheet and a pseudo-cubic micro-nano structure. The synthesis method comprises the following steps: (1) weighing CTAB (CetyltrimethylAmmonium Bromide), and dissolving in the mixed solution of deionized water and ethylene glycol at a constant temperature to obtain settled solution; (2) weighing Zn(NO3)2.6H2O, Co(NO3)2.6H2O and ureaat the molar ratio of 1:2:15, dissolving in the solution obtained in (1), and fully stirring; (3) transferring the solution obtained in (2) to a polytetrafluoroethylene lining stainless steel reaction kettle, sealing, and reacting for 3-20h at the temperature of 100-180 DEG C; (4) after reaction is finished, naturally cooling to room temperature, carrying out centrifugation, respectively cleaningwith the deionized water and absolute ethyl alcohol for three times, and drying to obtain a Zn-Co precursor. According to the synthesis method, through the simple regulation and control of reaction parameters, the micro-nano structure of ZnCo2O4 of different morphologies can be obtained through synthesis.

The invention discloses a preparation method for metal/polymer with a double-layer nanostructure. The method comprises the following steps of coating a layer of anti-adhesion material with low surface energy on a surface of a template by using a self-assembling method to serve as an anti-adhesion layer; then depositing a nano metal thin-film layer on the anti-adhesion layer; further spin-coating a layer of ultraviolet photoresist on the metal thin-film layer; covering a quartz plate using as a substrate on the surface of the ultraviolet photoresist; implementing ultraviolet imprint in a reversely imprinting manner, thus allowing the ultraviolet photoresist to fill into the nano metal thin-film layer; and acquiring a finished product by demolding after the ultraviolet photoresist is completely cured. The preparation method provided by the invention is short in technological process, simple and easy to implement; the template can be used repeatedly, and thus the preparation cost is low; the metal/polymer with the double-layer nanostructure prepared according to the method is high in compaction rate and good in intensity index; the nano metal thin-film layer has less interspace at the interior, even doing not have any interspace.

The invention discloses a low-dimensional rare earth boride nano material and a solid phase preparation method thereof. The preparation method comprises the following steps: S1, catalyst film synthesis: a catalyst is deposited on a substrate; and S2, solid phase source thermal evaporation deposition: under protection of a carrier gas, a boron source, an anhydrous rare earth halide and the substrate are placed at a growth temperature of 700-1200 DEG C and a growth gas pressure of 0.1-100 kPa for evaporation and growth for 0.5-4 h, and the low-dimensional rare earth boride nano material is obtained on the substrate. Controllable preparation of large area, high density, and single crystal rare earth boride nanostructures can be achieved on various substrates by using different catalysts.