Abstract
We present a systematic study of hexangular ZnO nanotube growth using zinc nitrate and NaOH as starting materials by varying solution concentration. ZnO nanotubes were characterized by field emission scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and growth mechanism was discussed. Supersaturation near ZnO surface is higher and leads to the [Formula: see text]-axis preferential growth. Low-magnification and high-resolution TEM micrographs revealed that best growth conditions for ZnO nanotube arrays were at 5[Formula: see text]mM zinc nitrate and 1[Formula: see text]mL of 1[Formula: see text]M NaOH. The growth morphology is largely determined by varying the NaOH concentration.
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