Suspended single crystal diamond devices, microdisks and beam structures, have been fabricated. Low energy boron ions (180keV) were implanted to create subsurface damage while maintaining an undamaged top surface; homoepitaxial growth was subsequently carried out on the material. The damaged layer was selectively removed by electrochemical etching. Electrodes were deposited adjacent to the devices to reduce the voltage required for etching and to help control the etch profile.

The controllable formation of zinc oxide (ZnO) nanostructures and nanowires by a cheap and environmental friendly fabrication method of simply subjecting metallic zinc films in sodium chloride (NaCl) solution at 170°C from 3 to 15 h under hydrothermal conditions is demonstrated in this study. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) indicate that ZnO films with different morphologies are obtained: from a film with network of circular pores to a film with nanowirelike network with bigger pores. It is observed that heating duration has an effect on its photoluminescence (PL) properties. Ultraviolet emission is observed for all ZnO films. Green emission surfaces after heating for 6 h, which subsequently disappears after 15 h of heating. It is suggested that the morphology change over different heating durations is responsible for the rise and subsequent decline in green emissions. Lastly, the growth mechanism behind zinc oxidation and morphology change is proposed and investigated with the aid of experimental method. It is verified that pitting corrosion is responsible for the growth mechanism here. M. Parans Paranthaman-contributing editor Manuscript No. 32012.