Tang, Y.; Chen, J.; Greiner, D.; Aé, L.; Baier, R.; Lehmann, J.; Sadewasser, S.; Lux-Steiner, M.Ch.: Fast Growth of High Work Function and High-Quality ZnO Nanorods from an Aqueous Solution. The Journal of Physical Chemistry C 115 (2011), p. 5239-5243
10.1021/jp109022k
Abstract:
A fast preparation process for high-quality as-grown ZnO nanorods by electrodeposition from an aqueous solution of Zn(NO3)2 and NH4NO3 at 75 C was established. The vertical growth rate of the ZnO nanorods was enhanced with an increase in the NH4NO3 concentration. The NH3 adsorbed on the ZnO nanorods’ surface results in a higher work function without a significant effect on the nanorods’ optical qualities. The use ofNH4NO3 leads to an increase in ZnO nanorods’ mobility while maintaining the carrier density constant. The increase of mobility is ascribed to a decrease of the dislocation and point defects inside grains owing to both fast growth rate and excess OH generation.