Disclosed herein are method and design rules for making polyelemental systems with specific heterostructures, including tetra-phase nanopartides with as many as six junctions. In accordance with an embodiment, a method of making a tetra-phase polyelemental nanoparticle using tri-phase nanoparticle architectures can include selecting two or more triphase nanoparticle architectures, wherein the two or more tri-phase nanoparticle architectures are one or more striped tri-phase architectures, one or more pie-shaped tri-phase architectures, or combinations thereof; identifying from the selected two or more tri-phase nanoparticle architectures groups of metals for generating each of the two or more tri-phase nanoparticle architectures; contacting a tip coated with an ink to a substrate to form a nanoreactor, the ink comprising block copolymer and the metals from the groups of metals identified for generating each of the two or more tri-phase nanoparticle architectures; and annealing the nanoreactors under conditions sufficient to synthesize a tetra-phase polyelemental nanoparticle.

Disclosed herein are method and design rules for making polyelemental systems with specific heterostructures, including tetra-phase nanopartides with as many as six junctions. In accordance with an embodiment, a method of making a tetra-phase polyelemental nanoparticle using tri-phase nanoparticle architectures can include selecting two or more triphase nanoparticle architectures, wherein the two or more tri-phase nanoparticle architectures are one or more striped tri-phase architectures, one or more pie-shaped tri-phase architectures, or combinations thereof; identifying from the selected two or more tri-phase nanoparticle architectures groups of metals for generating each of the two or more tri-phase nanoparticle architectures; contacting a tip coated with an ink to a substrate to form a nanoreactor, the ink comprising block copolymer and the metals from the groups of metals identified for generating each of the two or more tri-phase nanoparticle architectures; and annealing the nanoreactors under conditions sufficient to synthesize a tetra-phase polyelemental nanoparticle.

The present disclosure is drawn to multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of making three-dimensional printed articles. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent, a first reactive agent, and a second reactive agent. The fusing agent can include water and a radiation absorber. The first reactive agent can include a first liquid vehicle and an epoxy compound having multiple epoxide groups. The second reactive agent can include a second liquid vehicle and an amine compound having multiple amino groups.

Techniques are disclosed for milling an iron-containing raw material in the presence of a nitrogen source to generate anisotropically shaped particles that include iron nitride and have an aspect ratio of at least 1.4. Techniques for nitridizing an anisotropic particle including iron, and annealing an anisotropic particle including iron nitride to form at least one a″-Fe16N2 phase domain within the anisotropic particle including iron nitride also are disclosed. In addition, techniques for aligning and joining anisotropic particles to form a bulk material including iron nitride, such as a bulk permanent magnet including at least one a″-Fe16N2 phase domain, are described. Milling apparatuses utilizing elongated bars, an electric field, and a magnetic field also are disclosed.

A heat conductive paste including silver fine particles having an average particle diameter of primary particles of 40 to 350 nm, a crystallite diameter of 20 to 70 nm, and a ratio of the average particle diameter to the crystallite diameter of 1 to 5, an aliphatic primary amine and a compound having at least one phosphoric acid group. The heat conductive paste includes 1 to 40 parts by mass of the aliphatic primary amine and 0.001 to 2 parts by mass of the compound having at least one phosphoric acid group based on 100 parts by mass of the silver fine particles. The heat conductive paste has a high conductivity.

A method for purifying nanoparticles by which a large amount of nanoparticles can be obtained in a safe manner and in a short time as compared to a conventional method for purifying nanoparticles. A method for purifying nanoparticles by which nanoparticles are purified from a dispersion liquid in which nanoparticles are dispersed in a solvent A used in synthesis of the nanoparticles, the method including: a mixing step of mixing the dispersion liquid, a solvent B that is miscible with the solvent A, and a solvent C that forms two phases together with the solvent B; a concentrating step of concentrating the nanoparticles in a phase of the solvent C; a washing step of forming a third phase containing the nanoparticles in the phase of the solvent C; and a purifying step of extracting the third phase and removing the solvent C from the third phase.

Methods of synthesizing gold nanodendrites (AuNDs) using amines, such as long chain amines, as a structural directing agent are disclosed. Degree of branching (DB) of the AuNDs can be tuned by adjusting certain synthetic parameters, such as solvent type, and the type and concentration of the long chain amines. DB control results in dramatic tunability of the optical properties of the AuNDs in the near infrared (NIR) range enabling improved performance, for example as a photothermal cancer therapeutic.

Proposed is a three-dimensional chiral metal nanoparticle, comprising a heterometal nanoparticle including: a seed region formed of a first metal; and a heterogeneous region disposed on an external side of the seed region to enclose the seed region and formed of a second metal. The first metal is gold (Au), and the second metal is palladium (Pd). In a rectangular parallelepiped structure, a rectangular band shape rotates in a clockwise direction or a counterclockwise direction on each surface and protrudes towards a center of the surface.

Proposed is a three-dimensional chiral metal nanoparticle, comprising a heterometal nanoparticle including: a seed region formed of a first metal; and a heterogeneous region disposed on an external side of the seed region to enclose the seed region and formed of a second metal. The first metal is gold (Au), and the second metal is palladium (Pd). In a rectangular parallelepiped structure, a rectangular band shape rotates in a clockwise direction or a counterclockwise direction on each surface and protrudes towards a center of the surface.

Provided are a superatomic material, as well as a sol, a preparation method therefor, and application thereof. The superatomic material comprises a carrier and superatoms doped in the carrier, the superatoms being one or more of silver, copper, zinc superatoms and rare earth element superatoms, the scale of superatoms being 100-3000 pm, and the carrier being an inorganic carrier. The superatomic material and the sol have superior antimicrobial and antiviral properties, have a long service life, and are environmentally friendly.