Nano-pressure sensor

Mandal, D., Yoon, S., Kim, K.J., 2011. Origin of piezoelectricity in an electrospun polyfvinylidene fluoride-trifluoroethylene) nanofiber web-based nanogenerator and nano-pressure sensor. Macromol. Rapid Commun. 32,831-837. 

It was mentioned earlier that high-precision nano pressure sensors dispersed in the surface material of a spacecraft could continuously measure the instantaneous drag forces on a satellite. This would, for exanqile, enable real-time propulsion adjustments for high-precision orbit trajectories (drag-fr orbits), a crucial element of satellite formation flying. The ever more frequent discoveries of novel nanoelectronic devices (18) and first denmnstrations thereof as chemical sensors (27) su t that such devices will also play a role in future hyperthermal particle sensing. 

Flexible Nanogenerator and Nano-Pressure Sensor Based on Nanofiber Web of PVDF and its Copolymers... 

Many commercial split flow capillary LC systems incorporate a nano flow sensor mounted online to the capillary channel. The split flow system can be easily modified from a conventional system and performs satisfactorily for capillary LC applications. However, the split flow system may require thermal control and the LC solvent requires continuous degassing. In addition, the system may not work reliably at a high flow split ratios and at pressures above 6000 psi due to technical limitations of the fused silica thermal conductivity flow sensor. The split flow system based on conventional check valve design may not be compatible with splitless nano LC applications. The conventional ball-and-seat check valve is not capable of delivering nano flow rates and is not reliable for 7/24 operation at low flow. 

The photocatalytic H2 evolution was conducted in an inner irradiation Pyrex cell, which was connected to a closed gas-circulating system consisting of a circulation pump, a pressure sensor, gas sampling valves, and stainless steel tubing. As calcined powder nano-composite (0.2 g) was suspended in 4mol/l CH3OH (200 cm ) in the cell by use of a magnetic stirrer. Prior to the reaction, the mixture was deaerated by evacuation and then... 

Fan, F.R., Lin, L., Zhu, G., Wu, W., Zhang, R., Wang, Z.L., 2012b. Transparent triboelectric nano generators and self-powered pressure sensors based on micropatterned plastic films. Nano Lett. 12,3109-3114. 

The uniformity of injection molding process of different compounds was characterized by melt pressure measurement inside the mold cavity. A piezo-electric sensor (9221 AA0.6, Kistler, Switzerland) incorporated inside the tensile mold cavity and located behind and in contact to the ejector pin to measure the force exerted to the pin by melt pressure during the cyclic molding process against the time. The influence of nano-CaC03 inclusion in the PP... 

Examples of such chemosensors have been outlined including oxygen (or air pressure), pH, humidity, hydrogen peroxide, copper, and temperature sensors. However, the encapsulation of lanthanide probes in sohd state matrices or polymer nano- or microparticles can contribute to reduce the impact of interfering agents. Many polymers provide a selective permeability and block certain species. A number of copolymers, particularly block copolymers, are available that on the one hand are well suited for the immobilization of lanthanide complexes, and on the other hand hinder the diffusion of certain interfering species into the layer. 

Tin dioxide, an n-type semiconductor with a wide bandgap (3.6 eV at 300 K), has been widely studied as a sensor, a (photo)electrode material and in oxidation reactions for depollution. The performance of tin(iv) oxide is closely linked to structural features, such as nanosized crystallites, surface-to-volume ratio and surface electronic properties. The incentive for carbon-dioxide transformation into value-added products led to examination of the electroreduction of carbon dioxide at different cathodes. It has been recognised that the faradic yield and selectivity to carbon monoxide, methane, methanol, and formic acid rely upon the nature of the cathode and pH. ° Tin(iv) oxide, as cathode, was found to be selective in formate formation at pH = 10.2 with a faradic yield of 67%, whereas copper is selective for methane and ethene, and gold and silver for carbon monoxide. Nano-tin(iv) oxide has been shown to be active and selective in the carboigrlation of methanol to dimethyl carbonate at 150 °C and 20 MPa pressure. The catalyst was recyclable and its activity and selectivity compare with that of soluble organotins (see Section 21.5). 

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