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ZnO bulk material (bandgap 3.26 eV) was reduced in size via a top-down wet-chemistry synthesis process into colloidal nanoparticles that were then coated with polyvinyl-alcohol (PVA). When the nanoparticles were excited at 340 nm, strong UV emission at 377 nm was observed, and parasitic green emission (510 nm) which normally appears in ZnO nano-material was suppressed. Quantum confinement effects...
An MSM photoconductive detector has been fabricated from porous silicon using a micromachined silicon mask instead of photolithography. This approach allows damage to porous silicon that can be caused by chemical processing to be avoided. The interdigitated pattern of the silicon mask with a finger spacing of approximately 150 mu m and finger width of 50 mu m was made using silicon micromachining...
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