the
crystal growth of hexagonal NiSe crystals in o0014 directions,
thus leading to the systematical shape evolution of nickel selenides.
Future work is in progress to gain further insight into the
performances and applications of these materials. This simple
solvothermal approach with the assistances of mixed solvents
and electrolyte may be extended to the shape-controlled
synthesis of other metal chalcogenides with unique shapes and
structures.