VO2 (A): Reinvestigation of crystal structure, phase transition and crystal growth mechanisms

Using a single step and template free hydrothermal synthesis, well crystallized VO2 (A) microrods were prepared and the P4/ncc space group was assigned to the room temperature crystal structure. Reversible and irreversible phase transitions among different VO2 polymorphs were identified and their progressive nature was highlighted. Attempts to increase the microrods size, involving layer by layer formation mechanisms, are presented.