Keng Hsu

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Semiconductor nanowires have potential applications in photovoltaics, batteries, and thermoelectrics. We report a top-down fabrication method that involves the combination of superionic-solid-state-stamping (S4) patterning with metal-assisted-chemical-etching (MacEtch), to produce silicon nanowire arrays with defined geometry and optical properties in a(More)
We report the fabrication of degenerately doped silicon (Si) nanowires of different aspect ratios using a simple, low-cost and effective technique that involves metal-assisted chemical etching (MacEtch) combined with soft lithography or thermal dewetting metal patterning. We demonstrate sub-micron diameter Si nanowire arrays with aspect ratios as high as(More)
This paper presents a non-lithographic approach to generate wafer-scale single crystal silicon nanowires (SiNWs) with controlled sidewall profile and surface morphology. The approach begins with silver (Ag) thin-film thermal dewetting, gold (Au) deposition and lift-off to generate a large-scale Au mesh on Si substrates. This is followed by metal-assisted(More)
In this study we geostatistically interpolate spatial Snow Water Equivalent (SWE) for the entire Colorado River using multiple interpolation methods and multiple combinations of the snow telemetry (SNOTEL) and snow-course data. This study evaluated four techniques: Inverse Distance Weighting (IDW), Optimal Distance Averaging (ODA), hypsometric (regression(More)
  • Dilip Ramani, Keng Hsu, Arunachalanadar Madakannan
  • 2014
i ABSTRACT Current hybrid vehicle and/or Fuel Cell Vehicle (FCV) use both FC and an electric system. The sequence of the electric power train with the FC system is intended to achieve both better fuel economies than the conventional vehicles and higher performance. Current hybrids use regenerative braking technology, which converts the vehicles kinetic(More)
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