One‐Step SnO(2) Nanotree Growth

A comparison between Au, TiO(2) and self‐catalysed growth of SnO(2) nanostructures using chemical vapour deposition is reported. TiO(2) enables growth of a nanonetwork of SnO(2), whereas self‐catalysed growth results in nanoclusters. Using Au catalyst, single‐crystalline SnO(2) nanowire trees can be grown in a one‐step process. Two types of trees are identified that differ in size, presence of a catalytic tip, and degree of branching. The growth mechanism of these nanotrees is based on branch‐splitting and self‐seeding by the catalytic tip, facilitating at least three levels of branching, namely trunk, branch and leaf.