Fig. 8From: Scaled-Down c-Si and c-SiGe Wagon-Wheels for the Visualization of the Anisotropy and Selectivity of Wet-Chemical EtchantsEtching time series of Si(110) wagon-wheels in PAA-solution. Note the slightly slower etch rate of the <111> spokes compared to the other directions, most discernible in the image t0+ 90 min, and indicated by the dashed linesBack to article page