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Vertically integrated III-nitride nano-LEDs designed for operation in the telecommunication-wavelength range were fabricated and tested in the (p-GaN/InGaN/n-GaN/sapphire) material system. We found that the band edge luminescence energy of the nano-LEDs could be engineered by their size and by the strain interaction with the masked SiO2/GaN substrates; it depends linearly on the structure size. The...
Self-assembly approaches to construct plasmonic materials often result in high-symmetry structures within a thermodynamic limit. Here we demonstrate a novel selective self-assembly route for synthesis of a new class of nanoplasmonic structures with symmetry-breaking.
Plasmonic nanostructures were investigated for absorption enhancement of organic photovoltaic devices. Nanostructures were fabricated by scalable laser interference lithography. Experimental results agreed well with theoretical modeling.
A novel fabrication process for nanostructures for thermoelectric microgenerators, based on a combination of a traditional silicon micro- fabrication techniques, electroplating and submicron ion-track nano- lithography, is discussed. Ion-track etched polyimide nanotemplates (30-80 nm pore diameters) are used to grow Bi2Te3 nanowires by electroplating. The Bi2Te3 film's microstructural and thermoelectric...
We report a new scanning probe based method to achieve a controllable direct "writing" of metallic nanostructures. By scanning a gold-coated scanning probe tip on a single crystal silicon surface in ambient environment, nano-sized gold dots and wires were directly formed as a result of direct gold material transfer from scanning probe tip onto silicon surface. Such gold nanostructures could...
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