See if you can find the 8 differences in each set of images.
Organic crystal mountain
The scientist sits atop, Mountains of organic crystal snow, Yonder the electrons flow?
This visual pattern of high-performance organic semiconductor crystals 6,13-Bis(triisopropylsilylethynyl)pentacene was obtained using cross-polarized optical microscopy at 10 times magnification. The nucleating point shows a pattern that resembles a lone man wearing a curious hat on top of a snowy mountain of the organic crystals. The cross-polarizer modulates the brightness of the different mountain tops, providing an interesting perspective of depth.
Benjamin Tee, Stanford University, USA
Thin-film space invaders
In this army of hydrogenated amorphous-silicon thin-film transistors (TFTs) on a 1-mm thick glass substrate, the black areas are the chrome transistor source/drain/gate contacts, while the brown areas are comprised of a 150-nm thick amorphous-silicon channel. The gate dielectric, 300-nm transparent silicon nitride, is not visible. The field of view is 2 cm × 3 cm.
Warren S. Rieutort-Louis, Princeton University, USA
The answers will be in the June 2013 issue.
