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This paper reports an enhanced photocatalysis system for organic pollutants degradation, using high-aspect-ratio (HAR) Si/ITO/WO3 micropost photoelectrodes, fabricated by deep reactive ion etching (DRIE) and sputtering. Compared with traditional Titanium Dioxide (TiO2) photoelectrodes, Tungsten trioxide (WO3) coupled with Si can absorb visible light. Besides, an optimized HAR electrode configuration...
A novel method to construct a sensitive amperometric sensor for hydrogen peroxide (H2O2) is described. It is composed of highly dispersed palladium nanoparticles on a vertically aligned nickel-coated silicon micro-channel plate (MCP). The morphology of the Pd/Ni/Si-MCP electrode is characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrode with a three-dimensional...
In this study human motor cortical activity was recorded with a customized micro-ECoG grid during individual finger movements. The quality of the recorded neural signals was characterized in the frequency domain from three different perspectives: (1) coherence between neural signals recorded from different electrodes, (2) modulation of neural signals by finger movement, and (3) accuracy of finger...
This paper presents a fuzzy logic model to decode the hand posture from electro-corticographic (ECoG) activity of the motor cortical areas. One subject was implanted with a micro-ECoG electrode array on the surface of the motor cortex. Neural signals were recorded from 14 electrodes on this array while subject participated in three reach and grasp sessions. In each session, subject reached and grasped...
This letter studies the physical mechanism for the high-voltage forming process that is required before a TiOx resistance-change memory device can be set and reset repeatedly. A new insitu fabrication process has been developed and demonstrated to eliminate the high-voltage forming.
We have investigated effects of the oxygen doping into TaCx on the effective work function (Phim,eff) in TaCx/SiO2/Si and TaCx/HfO2/Si gate stacks. It has been found for the first time that the threshold voltage (Vth) is tunable within 0.5~0.6V for HfO2 MOSFETs by adjusting the oxygen content within 0~12 at. % in TaCx. Furthermore, it has been shown that unknown oxygen content in TaCx gates is a possible...
This paper discusses a role of the oxygen vacancy in HfO2/ultra-thin (UT) interfacial layer (IL) SiO2 gate stacks, focusing on the VFB roll-off. The metal/top-SiO2/HfO2/UT IL-SiO2/Si gate stacks have been studied. It is found for the first time that the VFB roll-off is eliminated by inserting 1~2 nm top-SiO2 between metal gate and HfO2. This elimination of the VFB roll-off is explained by compensating...
This paper focuses on the numerical investigation of the arc plasma behaviour with eddy currents mainly in electrodes and splitter plate generated by arc motion in arc splitting process. The elongation and splitting process are simulated through a three-dimensional (3D) magneto-hydro-dynamic (MHD) model. Without external magnetic field, the arc motion is described in detail by the temperature distribution...
It is expected that Wavelength Division Multiplex (WDM) fiber optic communications will be providing the high-speed backbone for the networks of the future. At the transmitter end, external laser modulation remains the approach of choice when high quality performance with reduced chirp is required at extra-high frequencies. Semiconductor based external laser modulators have the advantage of potential...
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