Abstract
SnO 2 recrystallized on SnO 2 rod crystals based on the reversible reaction SnO 2(s) = SnO(g)+ 1 2 O 2 (g) . SnO 2 whiskers with globule at the tip grew perpendicular to the a-axis of the rod crystal. Sn was the principal constituent of the globule, which was essential for the growth by the VLS mechanism and considered to be melted during the growth process. Zn, Cu and other metals detected as impurities in the whiskers appeared to have no appreciable effects on the whisker growth. The decrease in the partial pressure of oxygen in the ambient gas favored the whisker growth. It was suggested that Sn(1) was formed according to the disproportionation: 2 SnO(g) = Sn(1)+SnO 2(s).
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