Method for making nanomaterials
| DWPI Title: Making nanostructure for used in e.g. optic device, involves forming face centered cubic-ordered metal nanoparticle film, exerting hydrostatic pressure upon film, and applying non-hydrostatic stress to form array of nanowires |
| Abstract: A method of making a nanostructure by preparing a face centered cubic-ordered metal nanoparticle film from metal nanoparticles, such as gold and silver nanoparticles, exerting a hydrostatic pressure upon the film at pressures of several gigapascals, followed by applying a non-hydrostatic stress perpendicularly at a pressure greater than approximately 10 GPA to form an array of nanowires with individual nanowires having a relatively uniform length, average diameter and density. |
| Use: For making nanostructure (claimed) which is used in nanoelectronic and optic devices. |
| Advantage: The method is simple; is efficient nano-engineering process to tune nanoparticle assemblies and fabrications of new complex nanoparticle architectures; provides uniform single nanostructure that can re-assemble into ordered array upon solvent evaporation; provides greater control over both the uniform length of nanowires and the formation of ordered, ultrahigh density of nanowire arrays in comparison with chemical methods; and provides a pressure-induced phase transformation process to engineer nanoparticle architectures and to fabricate new nanostructured materials. The reversible changes of the nanoparticle unit cell dimension under pressure allow precise control over interparticle separation in 2D or 3D nanoparticle assemblies, offering unique robustness for interrogation of both quantum and classic coupling interactions. |
| Novelty: Making a nanostructure, involves preparing a face centered cubic-ordered metal nanoparticle film, where the metal is selected from gold and silver, exerting a hydrostatic pressure upon the film up to a pressure of ≈ 8.9 GPa, and subsequently applying a non-hydrostatic stress perpendicularly to form an array of nanowires. |
| Filed: 9/13/2010 |
| Application Number: US2010880886A |
| Tech ID: SD 11478.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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