SEM/TEM of the Month
Staff -- Semiconductor International, 6/1/2005
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Titled "The Tower of Babel," this 60× magnification shows the controlled growth of III-V nanowires at Philips Research (Eindhoven, Netherlands), where the engineers had patterned the substrate with lines and then etched back with KOH. One can see a pyramid where four lines have intersected in a tic-tac-toe formation, noted Frans Holthuysen, an electron microscopist who submitted the image. The sides of the pyramid are the etched <111> planes. A catalyst metal layer was then deposited on the substrate and MOCVD was performed on the sample to try controlled growth of nanowires at certain places. The spikes are nanowires and the grains are caused by background deposition of the MOCVD process.
Please send submissions for SEM/TEM of the Month to Peter Singer, Editor-in-Chief, 58 Summer St., Andover, MA 01810 USA. E-mail: sieditor@aol.com
