Homojunction of single-crystalline ZnO nanowire/nanowall network on c-Al₂O₃ substrate formed by thermal vapor phase epitaxy method

Homojunctional ZnO nanowire/nanowall structures were synthesized using a vapor phase epitaxy method. The homojunctional ZnO nanowire/nanowall structures are vertically well aligned having a random honeycomb-like pattern, and the metal catalyst only exists on the ends of the ZnO nanowires. The ZnO nanowires and nanowall synthesized on c-Al₂O₃ in the vapor-liquid-solid mode form a single unit and are part of the same single crystal. We focused on the study of the growth mechanism and crystal structure of homojunctional ZnO nanowire/nanowall structures.