Fig. 2From: Plasma-Assisted Growth of Silicon Nanowires by Sn Catalyst: Step-by-Step Observation a–d SEM images of NWs at different growth durations. a 2 min; b 2 min, side view; c 5 min; d 30 min. e–f High-resolution TEM images which show e twinning, f change of crystalline phase from cubic Si to hexagonal Si, and g change of growth direction from <111> to <211>Back to article page