Figure 6From: A large-scale fabrication of flower-like submicrometer-sized tungsten whiskers via metal catalysisTypical flower-like structures formed in growing process of whisker-like tungsten for different times. (a) Nanowire-like structure by holding for 3 h; (b) initial large-scale tungsten whisker-like structure by holding for 4.5 h; (c) large-scale flower-like tungsten whisker structures by holding for 6 h.Back to article page