Abstract
Controlled fabrication of boron-rich nanostructures was achieved by manipulating the processing temperature: high-temperature processing (1400–1500 °C) produced mainly tabular platelets with parallel twinning cross sections, whereas low-temperature processing (1100–1200 °C) facilitated the growth of star-shaped nanowires with cyclic twinning cross sections. This study revealed that this growth habit transition was related to the structural order of the adsorbed Ba atoms in nanoscale surficial films, which is a type of surface complexion (stable equilibrium phase-like surface states). It is demonstrated that an order–disorder transition in these surface complexions can play a critical role in determining the growth habits of crystals.
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