The present disclosure provides a class of chiral metal nanomaterials having controllable imbalanced chiral facets on their surfaces and preparation method thereof. Also provided is a method of preparing a chiral hybrid nanomaterial comprising chiral metal core with imbalanced chiral facets and semiconductor shell. Advantageously, the present chiral metal nanomaterials may be useful in the design and fabrication of other functional materials and devices with tailored chirality.

An embodiment of the present invention provides a frame-structured nanoparticle of porous-structured comprising: a ring-like shaped frame including a nano-sized internal ring frame and a gold nanoparticle external frame, wherein the nano-sized internal ring frame consists of platinum and the gold nanoparticle external frame surrounds the nano-sized internal ring frame; and a porous nanostructure positioned on inner space of the ring-like shaped frame. The frame-structured nanoparticle of porous-structured according to an embodiment of the present invention has the effect of providing a surface-enhanced Raman scattering analysis method on the basis of the high electromagnetic field focusing effect through the porous nanostructure.

Systems and methods for selectively making non-spherical metal nanoparticles from a metal material. The metal target surface is ablated to create an ejecta event or plume containing nanoparticles moving away from the surface. Ablation may be caused by laser or electrostatic discharge. At least one 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 through the electromagnetic field to create coral-shaped metal nanoparticles. The distance between the electromagnetic field and metal surface can be adjusted to yield metal nanoparticles of a desired size and/or shape.

Systems and methods for selectively making non-spherical metal nanoparticles from a metal material. The metal target surface is ablated to create an ejecta event or plume containing nanoparticles moving away from the surface. Ablation may be caused by laser or electrostatic discharge. At least one 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 through the electromagnetic field to create coral-shaped metal nanoparticles. The distance between the electromagnetic field and metal surface can be adjusted to yield metal nanoparticles of a desired size and/or shape.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, embodiments of the present disclosure provide for silver nanowires, methods of making silver nanowires, core-shell nanostructures, methods of making core-shell nanostructures, core-frame nanostructures, methods of making core-frame nanostructures, and the like.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, embodiments of the present disclosure provide for silver nanowires, methods of making silver nanowires, core-shell nanostructures, methods of making core-shell nanostructures, core-frame nanostructures, methods of making core-frame nanostructures, and the like.

The present disclosure relates to a method for synthesizing Pd nanocubes having an average size less than 10 nm. The reaction temperature, reaction time, and molar ratios of TOP/Pd-OLA can be used to control size and formation of the Pd nanocubes. The present disclosure is also directed to Pd nanocubes, less than 10 nm, having face centered cubic structures. Pd nanocubes of the present disclosure are an effective catalyst for CO.sub.2 reduction reaction with excellent selectivity for CO. Small sized Pd nanocubes can be used not only as the seeds to prepare other metal nanocubes, but can also as powerful catalysts for a wide variety of reactions in different industrial processes.

The present invention relates to novel gold nanocrystals and nanocrystal shape distributions that have surfaces that are substantially free from organic impurities or films. Specifically, the surfaces are clean relative to the surfaces of gold nanoparticles made using chemical reduction processes that require organic reductants and/or surfactants to grow gold nanoparticles from gold ions in solution.

The invention includes novel electrochemical manufacturing apparatuses and techniques for making the gold-based nanocrystals. The invention further includes pharmaceutical compositions thereof and the use of the gold nanocrystals or suspensions or colloids thereof for the treatment or prevention of diseases or conditions for which gold therapy is already known and more generally for conditions resulting from pathological cellular activation, such as inflammatory (including chronic inflammatory) conditions, autoimmune conditions, hypersensitivity reactions and/or cancerous diseases or conditions. In one embodiment, the condition is mediated by MIF (macrophage migration inhibiting factor).

A method of preparing silver nanoparticles, including silver nanorings. A zinc oxide thin film is formed initially by direct-current sputtering of a zinc target onto a substrate. A silver thin film is then formed by a similar sputtering technique, of a silver target onto the zinc oxide thin film. After that, the silver thin film is subject to an annealing treatment. The temperature, duration and atmosphere of the annealing treatment can be varied to control the average particle size, average distance between particles (density), particle size distribution of the silver nanoparticles. In at least one embodiment, silver nanoparticles of ring structure are produced.

A method of preparing silver nanoparticles, including silver nanorings. A zinc oxide thin film is formed initially by direct-current sputtering of a zinc target onto a substrate. A silver thin film is then formed by a similar sputtering technique, of a silver target onto the zinc oxide thin film. After that, the silver thin film is subject to an annealing treatment. The temperature, duration and atmosphere of the annealing treatment can be varied to control the average particle size, average distance between particles (density), particle size distribution of the silver nanoparticles. In at least one embodiment, silver nanoparticles of ring structure are produced.