This paper present a new design and configuration of metal oxide gas sensor based on back-gated device that can operate at low temperature. Gold electrodes patterned onto an oxidized, heavily doped, p-type silicon substrate were designed and fabricated at a wafer level. The Au— electrodes were used as source—drain metal contacts and a third gate electrode was connected from the backside of the ...

One-dimensional nanostructures are of particular interest in nanoelectronics because of the ease with which they can be utilized in fabricating nanodevices where their long axis facilitates contact to the structure, while the short axis preserves the quantized nature of electronic levels. It is therefore desirable to synthesize precisely controlled semiconductor and metal nanowires to study the...

We propose a method for localizing a fire source using an optical fiber distributed temperature sensor system. A section of two parallel optical fibers employed as the sensing element is installed near the ceiling of a closed room in which the fire source is located. By measuring the temperature of hot air flows, the problem of three-dimensional fire source localization is transformed to two di...

This paper describes the formulation and design principles of operation of a pneumatic proximity-to-tactile sensing device for automated recognition of objects within flexible manufacturing environments. This sensing device utilises a densely packed line array of piezoresistive pressure sensors, providing continuous variable output. The sensing head or plane of the device incorporates a corresp...

A novel surface plasmon resonance (SPR) sensor based on an integrated planar and polychromatic light source is presented. The sensor comprises an organic light emitting diode (OLED) and a metallic sensing layer located on opposite sides of a glass prism. We successfully fabricated and tested prototype sensors based on this approach by the use of different prism geometries and OLEDs with blue, g...

This work presents new tactile sensing chips consisting of 4 × 4 array of POSFET touch sensing devices (or taxels) and 4 diodes to measure contact temperature. In the new version presented here, the tactile sensing chips have been fabricated using CMOS technology. Both, the individual taxels and the array are designed to match spatio-temporal performance of the human fingertips. To detect conta...

In this paper, a microfiber knot resonator (MKR) was encapsulated in polydimethylsiloxane (PDMS), and its capability to sense temperature experimentally evaluated. A very high sensitivity of -12 nm/°C recorded for the MKR device, with diameter 2μm ring 95 μm. However, light-loss significant small MKR. We attribute low ratio ring-length microfiber-diameter. stable temperature-sensing performance...

In this paper, we report attenuation characteristics of aluminum nitride (AIN) film-based surface acoustic waves (SAWs) in liquids and their potential as liquid ethanol sensors. An AIN film-based SAW resonator was fabricated for liquid sensing application. The fabricated SAW device had a Rayleigh wave mode at a resonant frequency of 147.1 MHz and a low temperature coefficient of frequency (TCF)...

In this study, we have theoretically investigated the effect of electron stopper layer on internal temperature distribution of high performance vertical cavity surface-emitting laser emitting at 1305 nm. Simulation software PICS3D, which self-consistently combines the 3D simulation of carrier transport, self-heating, gain computation and wave-guiding, was used. Simulation results show that chan...