摘要 :
The micro touch sensor which is designed to be used in the blood vessels is proposed.Using this touch sensor, the risk of injuring blood vessels can be reduced. A prototype of micro touch sensor using PZT (lead zirconate titanate)...
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The micro touch sensor which is designed to be used in the blood vessels is proposed.Using this touch sensor, the risk of injuring blood vessels can be reduced. A prototype of micro touch sensor using PZT (lead zirconate titanate) thin film synthesized by hydrothermal method is made. The basic properties of the micro touch sensor are studied. In order to analyse the properties of the micro touch sensor, a mathematical model is set up.
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摘要 :
Alloy thin film for advanced pressure sensors was manufactured by means of ion-beam sputtering SiO2 insulation film and NiCr thin film on the 17-4PH stainless steel elastic substrate. The thin film resistance was respectively heat...
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Alloy thin film for advanced pressure sensors was manufactured by means of ion-beam sputtering SiO2 insulation film and NiCr thin film on the 17-4PH stainless steel elastic substrate. The thin film resistance was respectively heat-treated by four processes. The effects on stability of thin film alloy resistance were investigated, and paramaters of heat treatment that make thin film resistance stable were obtained. The experimental result indicates that the most stable thin film resistance can be obtained when it is heat-treated under protection of SiO2 and N2 at 673 K for 1 h, and then kept at 473 K for 24 h. Pressure sensor chips of high precision for harsh environments can be manufactured by this process.
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To create an artificial structure to remarkably surpass the sensitivity,selectivity and speed of the olfaction system of animals is still a daunting challenge.Herein,we propose a core-sheath pillar(CSP)architecture with a perfect ...
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To create an artificial structure to remarkably surpass the sensitivity,selectivity and speed of the olfaction system of animals is still a daunting challenge.Herein,we propose a core-sheath pillar(CSP)architecture with a perfect synergistic interface that effectively integrates the advantages of metal–organic frameworks and metal oxides to tackle the above-mentioned challenge.The sheath material,NH_(2)-MIL-125,can concentrate target analyte,nitro-explosives,by 10^(12)times from its vapour.The perfect band-matched synergistic interface enables the TiO_(2)core to effectively harvest and utilize visible light.At room temperature and under visible light,CSP(TiO_(2),NH_(2)-MIL-125)shows an unexpected self-promoting analyte-sensing behaviour.Its experimentally reached limit of detection(∼0.8 ppq,hexogeon)is 10^(3)times lower than the lowest one achieved by a sniffer dog or all sensing techniques without analyte pre-concentration.Moreover,the sensor exhibits excellent selectivity against commonly existing interferences,with a short response time of 0.14 min.
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The development and investigation of humidity sensing materials is a very imporantbranch for research field of sensors and actuators. With respect to materials, the humiditysensors are usually classified into three kinds: electrol...
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The development and investigation of humidity sensing materials is a very imporantbranch for research field of sensors and actuators. With respect to materials, the humiditysensors are usually classified into three kinds: electrolytes, polymers and porous ceramics.Lithium chlorite is a typical electrolyte as humiditive sensor and has been used
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Chromium (Cr) doped Zinc oxide ZnO thin films were deposited onto glass substrates by Metal Organic Chemical Vapour Deposition (MOCVD) technique with varying dopant concentration at a temperature of 420°C. The effect of the chrom...
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Chromium (Cr) doped Zinc oxide ZnO thin films were deposited onto glass substrates by Metal Organic Chemical Vapour Deposition (MOCVD) technique with varying dopant concentration at a temperature of 420°C. The effect of the chromium concentration on morphological, structural, optical, electrical and gas sensing properties of the films were investigated. The scanning electron microscopy results revealed that the Cr concentration has great influence on the crystallinity, surface smoothness and grain size. X-ray diffraction (XRD) studies shows that films were polycrystalline in nature and grown as a hexagonal wurtzite structure. A direct optical band energy gap of 3.32 to 3.10 eV was obtained from the optical measurements. The transmission was found to decrease with increasing Cr doping concentration. Rutherford Backscattering Spectroscopy (RBS) analysis also demonstrates that Cr ions are substitutionally incorporated into ZnO. I-V characteristic of the film shows a resistivity ranges from 1.134 × 10-2 · cm to 1.24 × 10-2 · cm at room temperature. The gas sensing response of the films were enhanced with incorporation of Cr as a dopant with optimum operating temperature around 200°C.
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