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In this work, we investigate how hydrogen sensing performance of thermally evaporated MoO3 nanoplatelets can be further improved by RF sputtering a thin layer of tantalum oxide (Ta2O5) or lanthanum oxide (La2O3). We show that dissociated hydrogen atoms cause the thin film layer to be polarised, inducing a measurable potential difference greater than that as reported previously. We attribute these...
In this work, we present an investigation on Pt/graphene/GaN devices for hydrogen gas sensing applications. The graphene layer was deposited on GaN substrate using a chemical vapour deposition (CVD) technique and was characterised via Raman and X-ray photoelectron spectroscopy. The current-voltage (I–V) and dynamic response of the developed devices were investigated in forward and reverse bias operation...
In this paper, we report the development of a novel Pt/MoO3 nano-flower/SiC Schottky diode based device for hydrogen gas sensing applications. The MoO3 nanostructured thin films were deposited on SiC substrates via thermal evaporation. Morphological characterization of the nanostructured MoO3 by scanning electron microscopy revealed randomly orientated thin nanoplatelets in a densely packed formation...
Solar cells consisting of extremely uniform and ordered large-area arrays of silicon micropillars are fabricated using metal-assisted chemical etching. Micropillar diameter, pitch, height, and core-shell doping profiles are optimized for light trapping and carrier collection.
Thin film edge emitting lasers with top/bottom stripes are broad area metal/metal bonded to a Si substrate. The bonding and top/bottom stripes are steps forward toward better heat dissipation, current confinement, and mechanical bonding strength.
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