Abstract: Systems herein relate to a device having a lens that directs angles of light toward solar cells and display sections having components that improve image clarity, reflectivity, and vividness. In one embodiment, a system includes a lens that directs incident light within a first angular range for absorption and a second angular range toward viewing material. The system also includes that the viewing material is within sections of the lens and forms an image. The system also includes reflective components adjacent to the viewing material within the sections of the lens, the reflective components reach ends of the lens away from the incident light and reflect the incident light within the second angular range that reflects off the viewing material. The system also includes an absorption component that captures energy from the incident light, the absorption component coupled to the lens at the ends and the reflective components.

Abstract: Systems, methods, and other embodiments described herein relate to a device having a lens that directs angles of light toward solar ink and display sections having components that improve image clarity, reflectivity, and vividness. In one embodiment, a system includes a lens that directs incident light within a first angular range for absorption and a second angular range toward viewing material. The system also includes that the viewing material within sections of the lens and forms an image. The system also includes reflective components adjacent to the viewing material within the sections of the lens, the reflective components reflect the incident light within the second angular range off the viewing material. The system also includes an absorption component that captures energy from the incident light, the absorption component is an ink applied to the lens.

Abstract: An acoustic structure includes an acoustic scatterer with a plurality of repeating cells and a corresponding plurality of resonant channels such that the acoustic scatterer is an angle independent acoustic absorber. The plurality of resonant channels each have an open end and a terminal end, and foam extends across the open ends of the plurality of resonant channels. And a layer of foam extending around the acoustic structure and/or or positioned at open ends of the resonant channels broadens the absorption and sound transmission loss bandwidth.

Abstract: An oxygen evolution reduction electrocatalyst includes a pyrochlore compound with the chemical formula Sm2Ru2xM2-2xO7, where M is selected from the group consisting of Ir, Sc, Fe, Cu, Pd, Cr, and Rh, and x is less than 1.0 and greater than or equal to 0.5. Also, a water electrolysis cell includes an anode, a cathode, an electrolyte, and the oxygen evolution reduction electrocatalyst.

Abstract: Disclosed are systems for directing flexural waves acting upon a structure. In one example, a system includes a beam and a pair of scatterers disposed on the beam and configured to induce a flexural wave on the beam when actuated at a frequency. The system is configured to direct a direction of travel of the flexural wave acting on the beam based on the width of the beam, the distance between the scatterers forming the pair of scatterers, and/or a phase difference between the actuation of the pair of scatterers.

Abstract: An acoustic structure includes at least one acoustic scatterer that is angle independent and has multiple resonant frequencies. Each acoustic scatterer contains at least one repeated cell. Each cell contains at least two distinct resonant channels capable of absorbing sound and improving sound transmission loss at distinct frequencies. Each resonant channel is identical to at least one other channel within the acoustic scatterer.

Abstract: An acoustic structure includes at least one coupled pair of Helmholtz resonators that have an inner wall, a first rectangular shaped Helmholtz resonator with a first inner volume on one side of and partially defined by the inner wall, and a second rectangular shaped Helmholtz resonator with a second inner volume on another side of and partially defined by the inner wall.

Abstract: Disclosed are systems and devices for absorbing flexural waves. In one example, a pair of scatterers for absorbing a flexural wave acting on a structure includes a monopole scatterer and a dipole scatterer configured to be mounted to the structure at the same location.

Abstract: Disclosed are systems for absorbing and/or isolating vibrations and/or flexural waves acting upon a structure using scatterers. In one example, a scatterer includes a pair of supports separated from each other by a distance, a flexible material extending between the supports, and a mass disposed on the flexible material. The flexible material acts as a spring and damper in a mass-spring-damper system, while the mass acts as a mass in a mass-spring-damper system. This scatterer may also include the ability to be switched on/off by placing a member within a cavity defined between the supports and the flexible material.

Abstract: Disclosed are systems for absorbing and/or isolating vibrations and/or flexural waves acting upon a structure using scatterers. In one example, a system for absorbing a flexural wave acting upon a structure includes a pair of scatterers adhered to the structure using an adhesive having a property that is based on a reduction of the flexural wave at a peak frequency by the pair of scatterers.

Abstract: A composite material having a black pigment and a textile material. The composite material has a reflectivity toward near infrared electromagnetic radiation having a wavelength from 800 nm to 2500 nm of greater than or equal to 12%, and the composite material has a reflectivity toward visible light having a wavelength from 350 nm to 750 nm of less than or equal to 10%.

Abstract: A metal-air battery includes an anode, a porous cathode, a separator between the anode and the porous cathode, a liquid electrolyte, and at least one acoustic device. The acoustic device produces acoustic waves at a frequency that pumps the liquid electrolyte through and into flowing contact with the porous cathode such that a discharge product is removed from the porous cathode. An accumulation compartment where the discharged product is collected after being removed from the porous cathode can also be included.

Abstract: An electrocatalyst for the production of hydrogen from water includes a pyrochlore compound with a composition or chemical formula of RE2(Ru)2xM2-2xO7, RE2(Ir)2xM2-2xO7or RE2(Ir,Ru)2xM2-2xO7, where RE is a rare earth element, M is an alkali metal, alkaline carth metal, transition metal, post-transition metal, Ge, or Sb, and x is less than 1.0 and greater than 0.0.

Abstract: Systems and devices are disclosed herein for absorbing unwanted target sounds. In one example, an acoustic scatterer for absorbing a target sound includes a housing defining a plurality of channels having an open end and a terminal end. The terminal ends of the plurality of channels are separate from each other and extend along a length of the housing. The acoustic scatterer also includes one or more spacers subdividing the plurality of channels along the length of the housing. In another example, a system for absorbing a target sound includes a plurality of acoustic scatterers, each having a housing that defines a plurality of channels having an open end and a terminal end. The terminal ends of the plurality of channels are separate from each other and extend along a length of the housing. The plurality of acoustic scatterers are stacked on top of each other in a lengthwise direction.

Abstract: A multilayer thin film that reflects an omnidirectional structural color includes a multilayer stack comprising having: a reflector layer; a first dielectric layer extending over the reflector layer; an absorbing layer extending over the first dielectric layer; and a second dielectric layer extending over the absorbing layer. The multilayer thin film reflects a single narrow band of visible light when exposed to broadband electromagnetic radiation, and the single narrow band of visible light has: a visible full width at half maximum (FWHM) width of less than 200 nm; a color shift of the reflected single narrow band of visible light is less than 50 nm when the multilayer stack is exposed to broadband electromagnetic radiation and viewed from angles between 0 and 45 degrees relative to a direction normal to an outer surface of the multilayer thin film.

Abstract: A discrete metallic particle having a metallic material, and a coating covering at least a portion of the metallic component. The discrete metallic particle has a thickness from 50 nm to 1000 nm, and the discrete metallic particle has a skin depth ? of greater than or equal to 1.0 ?m in a frequency range from 20-40 GHz. The skin depth ? is calculated by: ? = 2 ? ? ( 2 ? ? ? f ) ? ( ? 0 ? ? r ) ? 503 ? ? ? r ? f Where ? is skin depth in meters (m); ? is resistivity in ohm meter (?·m); f is frequency of an electromagnetic radiation in hertz (Hz); ?0 is permeability; and ?r is relative permeability of the metallic material.

Abstract: A method of forming a multilayer structure that reflects an omnidirectional structural color by atomic layer deposition (ALD) includes introducing at least one reflective core particle into a reaction chamber and depositing a conformal dielectric layer encapsulating the at least one reflective core particle in a dielectric-layer ALD cycle. Subsequently, a conformal barrier layer encapsulating the conformal dielectric layer is deposited in a barrier-layer ALD cycle, and a conformal absorber layer encapsulating the conformal barrier layer is deposited in an absorber-layer ALD cycle.

Abstract: A five-layer thin film structure including a reflector, a high refractive index layer on or encapsulating the reflector, and a metallic iron absorber layer on or encapsulating the high refractive index layer. The reflector has a thickness from 10 nm to 5000 nm, the high refractive index layer has a thickness from 5 nm to 500 nm; and the metallic iron absorber layer has a thickness from greater than 0 nm to 50 nm.

Abstract: A composite material having a black pigment and a textile material. The composite material has a reflectivity toward near infrared electromagnetic radiation having a wavelength from 800 nm to 2500 nm of greater than or equal to 12%, and the composite material has a reflectivity toward visible light having a wavelength from 350 nm to 750 nm of less than or equal to 10%.

Abstract: A method, computer program product, and sensor chip for use as a quantum magnetometer. An array of nano-pillars may be fabricated. A 2D-material may be transferred on top of the array of nano-pillars. The array of nano-pillars and the 2D-material may be combined with a sensor chip, wherein the array of nano-pillars and the 2D-material may be combined with the sensor chip at a constriction region of the sensor chip.