The present application relates to a method for the production of a noble metal nanomaterial comprising: (A) adding an aqueous solution of a source of noble metal ions and a reducing agent to an aqueous solution of an organic compound to form a reaction mixture, wherein the organic compound is capable of undergoing 2D planar stacking in aqueous solution; and (B) separating the noble metal nanomaterial from the reaction mixture. The present application also relates to a noble metal nanomaterial manufactured according to said method.

The present invention relates to compositions, comprising silver nanoplatelets, wherein the mean diameter of the silver nanoplatelets, present in the composition, is in the range of 20 to 70 nm with standard deviation being less than 50% and the mean thickness of the silver nanoplatelets, present in the composition, is in the range of 5 to 30 nm with standard deviation being less than 50%, wherein the mean aspect ratio of the silver nanoplatelets is higher than 1.5, a process for its production, printing inks containing the compositions and their use in security products. The highest wavelength absorption maximum of the population of all silver nanoplatelets in the composition being within the range of 450 to 550 nm. A coating, comprising the composition, shows a red, or magenta color in transmission and a greenish-metallic color in reflection.

Provided are thin leaf-like indium particles having a first peak and a second peak at a greater particle diameter than a particle diameter at which the first peak appears in a volume-based particle size distribution representing a relationship between particle diameters of indium particles and ratios by volume of the indium particles at the particle diameters, wherein a volume V1 of the indium particles at the first peak and a volume V2 of the indium particles at the second peak satisfy a formula (V1/V2)×100≥25%.

The present disclosure is directed to systems and methods for producing a metal-containing powder useful for additive manufacturing. The metal-containing powder includes a plurality of metal-containing platelets having a defined physical geometry and a defined aspect ratio. The metal platelets may be produced by depositing a metal layer on a substrate that includes one or more recessed or raised surface features. The one or more recessed or raised surface features create a fracture pattern in a metal layer deposited across at least a portion of the one or more surface features. By separating the metal layer from the substrate and fracturing the metal layer along the fracture pattern, a plurality of metal platelets are produced. In some embodiments, a release agent may be disposed between the metal layer and the substrate to facilitate the separation of the metal layer from the substrate.

The present disclosure relates to an Ag paste composition and a bonding film produced using same, the Ag paste composition being coated on a first object, and the first object being pressure sintered toward a second object side, thereby forming a sintered bonding layer between the first object and the second object, wherein the Ag paste composition comprises 90˜99 wt % of Ag powder, and 1˜10 wt % of an organic binder. The present disclosure controls the specific surface area and grain shape of the Ag powder, even without applying a spherical nanoparticle powder, and thus has the advantages of lowering a bond temperature and increasing bond density, thereby enabling the improvement of bond strength and reliability.

A multi-layered material is provided for shielding low-frequency electromagnetic waves. The multi-layered material may include a plurality of repeating sets of alternating layers of materials. Each repeating set of alternating layers may include an electrically conductive layer and a magnetic layer including a continuous layer of a magnetic material. The multi-layered material is generally configured to shield electromagnetic waves having a frequency of less than about 1 MHz. In various aspects, the electrically conductive layer may include a conductive metal layer, or a two-dimensional transitional metal carbide. The multi-layered material may be provided as a thin film, or can be shaped or sized as flakes for use with a resin composite that is deposited via a spray application technique.

According to embodiments of the present invention, an ink composition is provided. The ink composition includes a plurality of nanostructures distributed in at least two cross-sectional dimension ranges, wherein each nanostructure of the plurality of nanostructures is free of a cross-sectional dimension of more than 200 nm. According to further embodiments of the present invention, a method for forming a conductive member and a conductive device are also provided.

According to embodiments of the present invention, an ink composition is provided. The ink composition includes a plurality of nanostructures distributed in at least two cross-sectional dimension ranges, wherein each nanostructure of the plurality of nanostructures is free of a cross-sectional dimension of more than 200 nm. According to further embodiments of the present invention, a method for forming a conductive member and a conductive device are also provided.

The present invention relates to compositions, comprising platelet-shaped transition metal particles, wherein the number mean diameter of the platelet-shaped transition metal particles, present in the composition, is in the range of 15 nm to 1000 nm and the number mean thickness of the platelet-shaped transition metal particles, present in the composition, is in the range of 2 to 40 nm, the transition metal is selected from silver, copper, gold and palladium and the platelet-shaped transition metal particles bear a surface modifying agent of formula A-(CHR.sup.9).sub.r—R.sup.10 (V), wherein if r is 1, A is a C.sub.1-C.sub.25alkyl group substituted with one, or more fluorine atoms; a C.sub.2-C.sub.25alkenyl substituted with one, or more fluorine atoms; a C.sub.2-C.sub.25alkynyl group substituted with one, or more fluorine atoms; a C.sub.3-C.sub.20cycloalkyl group substituted with one, or more fluorine atoms; or a C.sub.6-C.sub.24aryl group substituted with one, or more fluorine atoms, CF.sub.3 or —O—CF.sub.3 groups; if r is 0, A is a C.sub.6-C.sub.24aryl group substituted with one, or more fluorine atoms, CF.sub.3 or —O—CF.sub.3 groups; or a C.sub.7-C.sub.24aralkyl group substituted with one, or more fluorine atoms, CF.sub.3 or —O—CF.sub.3 groups;

R.sup.9 is H, or a C.sub.1-C.sub.4alkyl group; and R.sup.10 is a thiol group, or an amino group.

Surface modification with fluorinated thiols/amines allows to tune the surface properties of silver nanoplatelets in such a way, as to, on the one hand, make them dispersible and colloidally stable in the finished printing ink system, and on the other hand, allow them to migrate to the substrate and print surfaces upon drying of the solvent in the printed layer.

A composition for pressure bonding contains a metal powder and a solid reducing agent and has a compressibility of 10% to 90%, the compressibility being expressed by a relationship formula using the thickness A of a dried coating film formed by drying the composition in an air atmosphere at 110° C. under atmospheric pressure for 20 minutes and the thickness B of a sintered body formed by treating the dried coating film in a nitrogen atmosphere at 280° C. under a pressure of 6 MPa for 20 minutes. The solid reducing agent may be BIS-TRIS. Also provided is a bonded structure of conductors in which a bonding portion via which two conductors are bonded together is formed by treating, under pressure, the two conductors and a coating film formed of the composition for pressure bonding provided therebetween.