摘要:
An actuator includes a first enclosure, a dielectric fluid in the first enclosure, and a second enclosure in fluid communication with the first enclosure. An elastic membrane defines at least a portion of the second enclosure. A first electrical conductor is positioned along a first side of the first enclosure. A second electrical conductor is positioned along a second side of the first enclosure opposite the first side. The second conductor is spaced apart from the first conductor. The conductors are connected to a power source. Application of electrical energy to the first and second conductors produces an attractive force between the conductors. Motion of the conductors toward each other pressurizes the dielectric fluid so as to force the dielectric fluid to flow from the first enclosure into the second enclosure. The flow of the dielectric fluid exerts a force on the elastic membrane which expands the elastic membrane.
摘要:
The devices and systems described herein generally relate to programmable surfaces. A set of tiles in conjunction with actuators, allow for the surface to be constantly changeable from a first shape to an unlimited variety of second shapes. Once a desired second shape is achieved, the shape can be held by actuating the actuators. The system can include detection and maintenance of the shapes of the programmable surface by controlling which of the actuators are released and when they are released.
摘要:
An actuator includes a first enclosure, a dielectric fluid in the first enclosure, and a second enclosure in fluid communication with the first enclosure. An elastic membrane defines at least a portion of the second enclosure. A first electrical conductor is positioned along a first side of the first enclosure. A second electrical conductor is positioned along a second side of the first enclosure opposite the first side. The second conductor is spaced apart from the first conductor. The conductors are connected to a power source. Application of electrical energy to the first and second conductors produces an attractive force between the conductors. Motion of the conductors toward each other pressurizes the dielectric fluid so as to force the dielectric fluid to flow from the first enclosure into the second enclosure. The flow of the dielectric fluid exerts a force on the elastic membrane which expands the elastic membrane.
摘要:
Electrodes employing as active material iridium nanoparticles synthesized by a novel route are provided. The nanoparticle synthesis is facile and reproducible, and provides iridium nanoparticles of very small dimension and high purity for a wide range of metals. The electrodes utilizing these nanoparticles have excellent efficiency catalyzing the electrolytic production of oxygen from water.
摘要:
A co-catalyst system for the removal of NOx from an exhaust gas stream has a layered oxide and a spinel of formula Ni0.15Co0.85CoAlO4. The system converts to nitric oxide to nitrogen gas with high product specificity. The layered oxide is configured to convert NOx in the exhaust gas stream to an N2O intermediate, and the spinel is configured to convert the N2O intermediate to N2.
摘要:
A reagent includes an element, formally in oxidation state zero, in complex with a hydride molecule and an incorporated ligand. The incorporated ligand typically has surface active properties. The reagent, termed a Ligated Anionic Element Reagent Complex, can be useful in synthesis of elemental nanoparticles. A method for synthesizing the aforementioned reagent includes a step of ball-milling a mixture containing an elemental powder, bulk hydride molecule, and bulk ligand. The components of the reagent, once complexed, have altered electronic structure and vibrational modes.
摘要:
A method for synthesizing ferromagnetic manganese-bismuth (MnBi) nanoparticles, and the MnBi nanoparticles so synthesized, are provided. The method makes use of a novel reagent termed a manganese-based Anionic Element Reagent Complex (Mn-LAERC). A process for forming a bulk MnBi magnet from the synthesized MnBi nanoparticles is also provided. The process involves simultaneous application of elevated temperature and pressure to the nanoparticles.
摘要:
Core shell nanoparticles of an iron oxide core, a silicon dioxide shell and an iron silicate interface between the core and the shell are provided. The magnetic properties of the nanoparticles are tunable by control of the iron silicate interface thickness. A magnetic core of high magnetic moment obtained by compression sintering the thermally annealed superparamagnetic core shell nanoparticles is also provided. The magnetic core has little core loss due to hysteresis or eddy current flow.
摘要:
Electrodes employing as active material metal nanoparticles synthesized by a novel route are provided. The nanoparticle synthesis is facile and reproducible, and provides metal nanoparticles of very small dimension and high purity for a wide range of metals. The electrodes utilizing these nanoparticles thus may have superior capability. Electrochemical cells employing said electrodes are also provided.
摘要:
A composition and its method of production are provided. The composition includes at least one zero-valent metal atom in complex with at least one hydride molecule. In some instances, the composition includes a first zero-valent metal atom and a second zero-valent metal atom in complex with at least one hydride molecule. The method of production includes ball-milling an elemental metal in a high-surface area form, with a hydride. The composition can be useful as a reagent for the synthesis of zero-valent metal alloy nanoparticles.