Abstract: A tetrachromatic perovskite image sensor includes a quartz layer, two perovskite p-i-n-i-p components, and two optical transparent electrodes. The first perovskite p-i-n-i-p component, on one side of the quartz layer, detects ultraviolet and blue light, with two photodetection layers corresponding to detection to ultraviolet and blue wavelength intervals. The second component, on the opposite side, detects green and red light, with layers for detecting green and red wavelength intervals. Optical transparent electrodes on both sides of the quartz layer apply bias collectively to both perovskite p-i-n-i-p components.

Abstract: A pinhole compound eye (PHCE) system includes: a pinhole array comprising a plurality of pinholes, wherein the pinhole array is configured to receive light from varying incident angles; and a detector array comprising a plurality of nanowires, wherein the detector array is positioned at a concave surface of the pinhole array and is configured to detect light passing through the pinhole array.

Abstract: A system comprising a biomimetic electrochemical eye (EC-EYE) and a computing device is provided. The EC-EYE comprises: an ionic liquid device; a nanowire (NW) device that comprises the plurality of NWs; and a connection device configured to provide a plurality of currents associated with the plurality of NWs to a computing device. The computing device comprises one or more processors and a display device. The one or more processors are configured to: receive the plurality of currents from the plurality of NWs via the connection device; determine a plurality of pixel characteristics associated with a plurality of pixels based on the plurality of currents from the plurality of NWs; generate an image comprising the plurality of pixels based on the plurality of pixel characteristics; and provide the image to a display device. The display device is configured to display the image.

Abstract: A gas sensor array comprises a plurality of metal decorated metal oxide film based on three-dimensional nanostructured templates, each including a porous anodized aluminum oxide (AAO) template and a plurality of metal decorated metal oxide films. The porous AAO substrate has a top surface with top gold electrodes, a bottom surface with bottom gold electrodes and a plurality of pores. Each pore has an interior wall and two openings located on the top surface and the bottom surface respectively for allowing air to enter into the pore. Each metal-decorated metal oxide film comprises a metal oxide film and metal decoration particles. The metal oxide film has an internal surface attaching on a respective interior wall and an external surf-ace being decorated with the metal particles. Each decoration metal is different to provide different sensitivities in response to an environmental gas.

Abstract: A depilatory wax applying device includes: a housing provided with a feed port and a discharge port; a conveying channel provided in the housing, the conveying channel including a guiding tube, a heat insulation tube, and a heating tube that are connected successively, the guiding tube corresponding to the feed port, and the heating tube corresponding to the discharge port; a wax strip pushing device provided between the feed port and the guiding tube and configured to push a wax strip into the guiding tube; and a control device provided in the housing and electrically connected to the heating tube and the wax strip pushing device.

Abstract: Disclosed is a low-cost, scalable and highly repeatable approach to fabricate polystyrene films with three-dimensional nanopyramids on the surface. The nanopyramids have tubable aspect ratio and anti-bacterial performance. The effectiveness of the nanopyramids on bacterial and fungi growth inhibition and the role of nanostructure aspect ratio are confirmed via through scanning electron microscopy and confocal laser scanning microscopy. The results show an excellent antibacterial performance with more than 90% reduction in E. coli population in all nanopyramid samples after a 168-hr prolonged incubation time. The nanopyramid film developed here can be used for the clinical and commercial applications to prevent the growth of pathogenic bacteria on various surfaces.

Abstract: Aspects describe a nanotube array gas sensor, and methods to manufacture and use the same. In one example, the nanotube array gas sensor comprises an insulator template including an array of parallel aligned, open-ended nanotubes; a sensing material deposited on at least interior surfaces of the nanotubes; and catalyst nanoparticles distributed on the sensing material. An electronic controller activates electrodes made of different conductor materials in order to obtain multiple measurements of electrical resistance across the insulator template. The electrical resistance measurements can be compared to electrical resistance profiles in order to determine types and concentrations of gases in the nanotube array gas sensor.

Abstract: A system comprising a biomimetic electrochemical eye (EC-EYE) and a computing device is provided. The EC-EYE comprises: an ionic liquid device; a nanowire (NW) device that comprises the plurality of NWs; and a connection device configured to provide a plurality of currents associated with the plurality of NWs to a computing device. The computing device comprises one or more processors and a display device. The one or more processors are configured to: receive the plurality of currents from the plurality of NWs via the connection device; determine a plurality of pixel characteristics associated with a plurality of pixels based on the plurality of currents from the plurality of NWs; generate an image comprising the plurality of pixels based on the plurality of pixel characteristics; and provide the image to a display device. The display device is configured to display the image.

Abstract: The present invention discloses a handheld intelligent waxing device for depilatory wax comprising a housing, a feeding inlet and a discharging outlet are provided on the housing; a conveying channel for a depilatory wax strip to pass through is provided between the feeding inlet and the discharging outlet; a conveying device is provided at one end of the conveying channel where the feeding inlet is located, and a heating device is provided at the other end of the conveying channel where the discharging outlet is located; the housing is further provided with a control device for controlling the heating device and the conveying device.

Abstract: A depilatory wax applying device includes: a housing provided with a feed port and a discharge port; a conveying channel provided in the housing, the conveying channel including a guiding tube, a heat insulation tube, and a heating tube that are connected successively, the guiding tube corresponding to the feed port, and the heating tube corresponding to the discharge port; a wax strip pushing device provided between the feed port and the guiding tube and configured to push a wax strip into the guiding tube; and a control device provided in the housing and electrically connected to the heating tube and the wax strip pushing device.

Abstract: Provided herein is a gas sensor array and the apparatus incorporating the gas sensor array for performing gas detection and concentration level identification. The gas sensor array comprises a plurality of metal decorated metal oxide film based on three-dimensional nanostructured substrates, each including a porous anodized aluminum oxide (AAO) substrate and a plurality of metal decorated metal oxide films. The porous AAO substrate has a top surface with top gold electrodes, a bottom surface with bottom gold electrodes and a plurality of pores. Each pore has an interior wall and two openings located on the top surface and the bottom surface respectively for allowing air to enter into the pore. Each metal-decorated metal oxide film comprises a metal oxide film and metal decoration particles. The metal oxide film has an internal surface attaching on a respective interior wall and an external surface being decorated with the metal particles.

Abstract: Aspects describe a nanotube array gas sensor, and methods to manufacture and use the same. In one example, the nanotube array gas sensor comprises an insulator template including an array of parallel aligned, open-ended nanotubes; a sensing material deposited on at least interior surfaces of the nanotubes; and catalyst nanoparticles distributed on the sensing material. An electronic controller activates electrodes made of different conductor materials in order to obtain multiple measurements of electrical resistance across the insulator template. The electrical resistance measurements can be compared to electrical resistance profiles in order to determine types and concentrations of gases in the nanotube array gas sensor.

Abstract: The present disclosure provides in some embodiments an oxide TFT display substrate, a manufacture method thereof and a display device. The oxide TFT display substrate includes a first region at least corresponding to a semiconducting region of an oxide TFT and a second region other than the first region. The method includes steps of: forming, after the formation of the oxide TFT, a SiON layer at least covering the first region; and forming a SiNx layer covering the second region.

Abstract: The present disclosure provides in some embodiments an oxide TFT display substrate, a manufacture method thereof and a display device. The oxide TFT display substrate includes a first region at least corresponding to a semiconducting region of an oxide TFT and a second region other than the first region. The method includes steps of: forming, after the formation of the oxide TFT, a SiON layer at least covering the first region; and forming a SiNx layer covering the second region.

Abstract: Roll-to-roll fabrication of predetermined or ordered three-dimensional nanostructure arrays is described. Provided methods can comprise imprinting a substrate with a two-dimensional (2-D) pattern by rolling a cylindrical pattern comprising a 2-D array of structures against a substrate. In addition, control or determination of nanostructure parameters via control of process parameters is provided.

Abstract: Disclosed are three-dimensional nanocone film layers and associated devices. The nanocone film layers exhibit desirable properties such as anti-reflection, hydrophobicity, and low cost production. The nanocone film layers can be utilized to cover the surface of a photovoltaic cell and provide benefits to the photovoltaic cell such as enhance its light absorption capability, provide protection from moisture, increase efficiency of converting light to electricity, facilitate self-cleaning, and other such benefits. Furthermore, in an aspect, methods of fabricating three-dimensional nanocone film layers are disclosed herein.

Abstract: Roll-to-roll fabrication of predetermined or ordered three-dimensional nanostructure arrays is described. Provided methods can comprise imprinting a substrate with a two-dimensional (2-D) pattern by rolling a cylindrical pattern comprising a 2-D array of structures against a substrate. In addition, control or determination of nanostructure parameters via control of process parameters is provided.

Abstract: Direct growth of black Ge on low-temperature substrates, including plastics and rubber is reported. The material is based on highly dense, crystalline/amorphous core/shell Ge nanoneedle arrays with ultrasharp tips (˜4 nm) enabled by the Ni catalyzed vapor-solid-solid growth process. Ge nanoneedle arrays exhibit remarkable optical properties. Specifically, minimal optical reflectance (<1%) is observed, even for high angles of incidence (˜75°) and for relatively short nanoneedle lengths (˜1 ?m). Furthermore, the material exhibits high optical absorption efficiency with an effective band gap of ˜1 eV. The reported black Ge can have important practical implications for efficient photovoltaic and photodetector applications on nonconventional substrates.

Abstract: Described herein is a method for obtaining a three-dimensional nanostructure array on an aluminum substrate. The method includes anodizing the aluminum substrate; forming an oxide layer on the aluminum substrate; texturizing the aluminum substrate; etching the oxide layer from the aluminum substrate to expose the texturized aluminum substrate; and forming a three-dimensional aluminum nanostructure array on the aluminum substrate. The three-dimensional nanostructure array, coated with a light absorber, is utilized in a thin film solar cell or photovoltaic cell.

Abstract: An embodiment of nanostructure includes a conductive substrate; an insulating layer on the conductive substrate, metal nanoparticles, and elongated single crystal nanostructures. The insulating layer includes an array of pore channels. The metal nanoparticles are located at bottoms of the pore channels. The elongated single crystal nanostructures contact the metal nanoparticles and extend out of the pore channels. An embodiment of a photovoltaic device includes the nanostructure and a photoabsorption layer. An embodiment of a method of fabricating a nanostructure includes forming an insulating layer on a conductive substrate. The insulating layer has pore channels arranged in an array. Metal nanoparticles are formed in the pore channels. The metal nanoparticles conductively couple to the conductive layer. Elongated single crystal nanostructures are formed in the pore channels.