A method of preparing biocompatible and stable gold nanoparticles comprises preparing at least one flavonoid-rich plant extract, and mixing at least one of the plant extracts with an aqueous solution of at least one gold salt. The flavonoid-rich plant extract is an extract of Hubertia ambavilla or Hypericum lanceolatum. The gold nanoparticles may be used for medical and/or cosmetic purposes.

A method for continuously preparing nanoparticles including a noble metal or an alloy thereof belongs to the technical field of preparation of inorganic nanomaterials. A three-way quartz tube microreactor is designed; noble metal solutions used as raw materials are continuously inputted into the microreactor by injection pumps; and a plasma technology is coupled to form discharge in the microreactor to directly prepare nanoparticles including a noble metal or an alloy thereof. The device and the method have low energy consumption, wide operation range, safety, high efficiency, green and environmental protection. The synthesized nanoparticles have high purity, small size, narrow particle size distribution and adjustable components.

A composition for forming a contiguous conductive feature on a substrate includes silver nanoparticles, a titanium precursor compound, a first non-aqueous polar protic solvent, and a second non-aqueous polar protic solvent. The concentration of the titanium precursor compound in the composition is in a range of 2 vol % to 13 vol %. A method of forming a contiguous conductive feature on a substrate includes dispensing the composition on the substrate to form a contiguous precursor feature and sintering the contiguous precursor feature at a sintering temperature in a range of 300° C. to 500° C. to form the contiguous conductive feature. Example titanium precursor compounds are: titanium(IV) butoxide, titanium(IV) isopropoxide, titanium(IV) chloride, tetrakis(diethylamido)titanium(IV), and dimethyltitanocene.

An alloy powder having an alloy composition represented by Fe.sub.100-a-b-c-d-e-fCu.sub.aSi.sub.bB.sub.cCr.sub.dSn.sub.eC.sub.f, wherein a, b, c, d, e and f are atomic % meeting 0.80≤a≤1.80, 2.00≤b≤10.00, 11.00≤c≤17.00, 0.10≤d≤2.00, 0.01≤e≤1.50, and 0.10≤f≤0.40.

The present invention relates to a process for purifying metal nanowires, comprising at least the following steps: (i) providing a suspension of metal nano-objects in a hydroalcoholic solvent medium having a viscosity at 25° C. strictly less than 10 mPa.Math.s, the metal nano-objects including fine nanowires and additional nanoparticles different from the fine nanowires; (ii) adding, to the metal nano-object suspension, metalloid or metal oxide nanoparticles having a diameter less than or equal to 50% of the average diameter of the nanowires; (iii) allowing the suspension of metal nano-objects with the added metalloid or metal oxide nanoparticles to settle under conditions conducive to the precipitation of the fine metal nanowires; and (iv) recovering the settled solids made from the fine metal nanowires.

A caster assembly configured to process and store a material includes a reaction chamber, a storage assembly configured to store material processed in the reaction chamber, and a blower configured to process and store the material. The reaction chamber includes a vessel configured to hold the material in a melted state prior to processing and a powder generating assembly configured to receive the material from the melting vessel. The powder generating assembly includes a feeding chamber and a feeding device disposed at least partially within the feeding chamber. The feeding device includes at least one nozzle configured to inject inert fluid, where the fluid is a gas, liquid, or combination of the two into the feeding chamber and a material inlet through which the material is configured to flow into the feeding chamber to be exposed to the inert fluid, where the fluid is a gas, liquid, or combination of the two.

Disclosed are: a metal nanostructure having a diameter of 2 nm to 2.5 nm; and a manufacturing method therefor. The formed metal nanostructure is provided as approximately spherical single-crystalline nanoparticles or amorphous alloy nanoparticles. Besides, a nanostructure fabricated in the form of an oxide has a nanoneedle shape. For formation of the metal nanostructure, an amorphous nanostructure is used. A second metal element having a higher standard reduction potential than a central metal constituting the amorphous nanostructure is used in the synthesis of the metal nanostructure.

A process for manufacturing metal-ceramic composite material powder comprising ball milling metal powder and ceramic nanoparticles to yield a metal-ceramic composite powder comprising ceramic nanoparticles embedded in a metal matrix powder particles; wherein the ball milling is performed using a ceramic milling media and a milling vessel having a ceramic interior surface. Metal matrix nanocomposite powders comprising ceramic nanoparticles imbedded in metal matrix powder particles; wherein the metal matrix powder particles have a spherical shape; wherein there is uniform distribution the ceramic nanoparticles; wherein the nanocomposite powders have good flowability.

A production method for an alloy member having mainly high hardness and high resistance to corrosion and produced by an additive manufacturing method, the alloy member, and a product using the alloy member are provided. The production method for an alloy member includes: an additive manufacturing step of forming a shaped member through an additive manufacturing method using an alloy powder containing elements Co, Cr, Fe, Ni, and Ti each in a range of 5 atom% to 35 atom% and containing Mo in a range exceeding 0 atom% and 8 atom% or less, the remainder being unavoidable impurities; and a heat treatment step of holding the shaped member in a temperature range higher than 500° C. and lower than 900° C. directly after the additive manufacturing step without undergoing a step of holding the shaped member in a temperature range of 1080° C. to 1180° C.

A nanoparticle includes a metal-based core, a first coating layer substantially covering the metal-based core to generate a coated metal-based core, and a second coating layer at least partially covering the coated metal-based core, wherein the metal-based core comprises at least one transition metal, and wherein the metal-based core comprises the at least one transition metal substantially in a state of zero oxidation.