5 results about "Nanoshell" patented technology

The application provides a metal-loaded transition metal oxide-transition metal chalcogenide composite material and a preparation method and application thereof, a transition metal chalcogenide nanoshell is wrapped on the surface of a transition metal oxide nanoparticle to form a core-shell structure, and metal microparticles are loaded on the surface of the transition metal chalcogenide nanoshell, the metal microparticles are single atoms, nanoclusters or nanocrystals. The composite material has double active sites of metal and chalcogen vacancies, and the nanoshell and the metal microparticles are closely combined at a molecular scale, so that the core-shell structure composite material has lower overpotential, smaller Tafel slope and impedance, larger surface active area and better durability when used as an electrocatalyst for electrocatalytic HER. The application solves the problem that pH restricts electrocatalytic HER of a transition metal chalcogenide, provides an atomic-level design strategy for preparing a high-efficiency full-pH electrocatalyst, and has important significance for promoting sustainable hydrogen production by water electrolysis.

The application discloses a kind of bifunctional hybrid type plasmonic sensor, including substrate, metal film, dielectric grating and metal nanoshell array;The metal film is evaporated on the substrate;The dielectric grating is located between the metal film and the metal nanoshell array;The metal nanoshell array is with the dielectric grating as template, and is inclined and evaporated on the surface of the dielectric grating;The metal film and the metal nanoshell array are coupled to form plasmon mode under the action of incident light wave.The bifunctional hybrid type plasmonic sensor is based on superstructure grating, RA and LSPR are fully coupled, and the intensity of coupling signal is fully played by controlling the angle of incident light.Thereby it can be used to detect the small change of external environment refractive index, and also can detect the small change of local refractive index generated by the combination of virus antibody and antigen adsorbed on the surface of structure.

The application belongs to the field of biomedical metal materials, and discloses a high-quality medical Ta-xTi alloy powder for additive manufacturing and a preparation method thereof. The powder is composed of titanium powder, tantalum powder, tantalum-doped titanium nitride coated amorphous carbon nanoshell, yttrium-stabilized zirconium coated mesoporous silica nanoparticles and stearic acid in a specific weight ratio. In the preparation process, first, nanometer tantalum powder and two modified compounds are uniformly adsorbed on the surface of micron-sized titanium powder through electrostatic self-assembly technology to form a core-shell structure composite powder; then, the composite powder is spheroidized by radio frequency plasma, and finally, high-quality alloy powder with high sphericity and good fluidity is obtained. The method solves the problems of composition segregation and unmelted particles of high-melting-point tantalum and titanium in the laser selective melting forming process, and at the same time, the method endows the material with lower elastic modulus and enhanced biological activity and antibacterial performance, and is particularly suitable for manufacturing high-performance customized bone implants.

This invention discloses a method for preparing surface-modified spherical hollow nanoshell NiS and its application, relating to inorganic non-metallic materials and their application in the field of passive interference technology. The prepared surface-modified spherical hollow nanoshell NiS can be used as a novel passive smoke screen interference material. Its particle surface is hydrophobically modified, making it less prone to agglomeration and exhibiting good flow properties, thus improving the compatibility of the product with equipment in practical applications. Its crystal configuration and unique hollow structure give it strong absorption and scattering capabilities. The nanometer thickness of the hollow spherical structure can excite the small size effect and quantum size effect of the material, and it has high extinction capabilities in the visible light and near-mid-far infrared bands. Compared with traditional smoke screen interference materials, it has great performance advantages, and the preparation process is simple, efficient, and low in cost.

The disclosure relates to particle-based assays for the detection of analytes. Using various combinations of particular technologies, including gold nanorods, silver nanoparticles, gold / silver nanoshells, gold / silver nanocages and nanobubble detection, enhanced detection limits can be achieved across a large range of analytes.