Disclosed is a method for making a colloidal suspension of precious metal nanoparticles. The method comprises providing a target material comprising a precious metal in a liquid dispersion medium in an ablation container. The dispersion medium has an electrical conductivity within a predetermined conductivity range. Laser pulses are used to generate the nanoparticles from the target in the container. While generating the nanoparticles the electrical conductivity of the dispersion medium is monitored and maintained within the predetermined range and thereby the generated nanoparticles are produced within a predetermined size range. The generated nanoparticles are used to form a colloidal suspension.

Provided are metal nanoparticle composite body whose multiple properties, such as a good metal nanoparticle control property, high dispersion stability, a good low-temperature firing property, and ease of purifying and separating metal nanoparticles, are intentionally added and controlled so that practical electrical conductivity can be exhibited, a metal colloidal solution in which the metal nanoparticle composite body is dispersed, and methods for producing these. A metal nanoparticle composite body includes a nitrogen-containing compound (A) and a metal nanoparticle (B), in which the nitrogen-containing compound (A) contains an oxidized nitrogen atom. A metal colloidal solution is obtained by dispersing the metal nanoparticle composite body in a medium. A method for producing a metal colloidal solution is characterized in that metal ions are reduced in a medium in the presence of a nitrogen-containing compound (A) containing an oxidized nitrogen atom so as to form metal nanoparticles (B).

An apparatus and process for creating uniformly sized, spherical nanoparticles from a solid target. The solid target surface is ablated to create an ejecta event containing nanoparticles moving away from the target surface. Ablation may be performed by laser or electrostatic discharge. At least one continuous planar electromagnetic field is placed in front of the solid target surface being ablated. The electromagnetic field manipulates at least a portion of the nanoparticles as they move away from the target surface and pass through the electromagnetic field to increase size and spherical shape uniformity of the nanoparticles. The manipulated nanoparticles are collected as a stable suspension in a fluid.

The present disclosure provides anti-bed bug monoclonal antibodies and antigen-binding fragments thereof as well as compositions and kits comprising the same. The present disclosure also provides methods of making monoclonal antibodies and antigen-binding fragments thereof and methods of using the same to detect bed bugs.

The present application relates to colloidal chemistry, specifically to methods of synthesising gold nanoparticle colloids in a non-aqueous solvent, preferably, in dimethyl sulfoxide. In particular these gold nanoparticles have an average size of 5-20 nm and are in a biocompatible colloidal solution.

The present application relates to colloidal chemistry, specifically to methods of synthesising silver nanoparticle colloids in a non-aqueous solvent, preferably, in dimethyl sulfoxide. In particular these silver nanoparticles have an average size of 12-20 nm and are in a biocompatible colloidal solution.

The present disclosure provides anti-bed bug monoclonal antibodies and antigen-binding fragments thereof as well as compositions and kits comprising the same. The present disclosure also provides methods of making monoclonal antibodies and antigen-binding fragments thereof and methods of using the same to detect bed bugs.

The present disclosure relates to the cleansing of nanoparticles in aqueous cationic surfactant solutions, including polyalkylammonium salts such as cetyltrimethylammonium bromide, as demonstrated by surfactant exchange, followed by the addition of peptizing agents to stabilize the cleansed nanoparticle solutes.

An organic aluminum sol and a preparation method thereof related to chemical technology fields. Organic mixed acids are used to react with aluminum powder to prepare organic aluminum sol as a precursor for preparing alumina fiber. The aluminum powder, formic acid, and oxalic acid are used as raw materials, the oxalic acid and the formic acid are firstly mixed to be even according to a preset ratio to obtain a mixed acid solution, and the aluminum powder is then completely reacted with the mixed acid solution to obtain an aluminum carboxylate solution under a condensation reflux condition, and the aluminum carboxylate solution is finally filtered to obtain the aluminum carboxylate sol that is clear and transparent. A chemical formula of a composition of the organic aluminum sol is expressed as: Al(OH).sub.x(HCOO).sub.y(COOCOO).sub.z, wherein 0<x<2, 0<y<2, and 0<z<1.

Methods for preparing highly stable concentrated dispersions of silver nanoparticles and described herein. Contemplated methods comprise combining a selected polysaccharidic dispersant with a selected non-reacting dispersant to yield concentrated silver dispersions with enhanced stability and lowered undesirable residual organics. Contemplated methods further comprise selecting an appropriate source of silver ions to reduce the ionic strength of the reaction medium and final silver dispersions.