Thickness-controlled synthesis of vertically aligned c-axis oriented ZnO nanorod arrays: Effect of growth time via novel dual sonication sol-gel process

• Published in: Japanese Journal of Applied Physics
• Main Author: Malek M.F.; Mamat M.H.; Soga T.; Rahman S.A.; Bakar S.A.; Ismail A.S.; Mohamed R.; Alrokayan S.A.H.; Khan H.A.; Mahmood M.R.
• Format: Conference paper
• Language: English
• Published: Japan Society of Applied Physics 2016
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84953281770&doi=10.7567%2fJJAP.55.01AE15&partnerID=40&md5=08e98552052d59ad6fc2d2e73dbeea5e

Zinc-oxide (ZnO) nanorod arrays were successfully prepared by using dual sonication sol-gel process. Field emission scanning electron microscopy revealed that the nanorods exhibited a hexagonal structure with a flat-end facet. The nanorods displayed similar surface morphologies and grew uniformly on the seed layer substrate, with the average diameter slightly increasing to the range of 65 to 80nm after being immersed for varying growth times. Interestingly, thickness measurements indicated that the thicknesses of the samples increased as the growth time was extended. In addition, the X-ray diffraction spectra indicated that the prepared ZnO nanorods with a hexagonal wurtzite structure grew preferentially along the c-axis. Therefore, we can conclude that the diameter, length, and orientation of the ZnO nanorod arrays along the c-axis are controllable by adjusting the growth time, motivating us to further explore the growth mechanisms of ZnO nanorods. © 2016 The Japan Society of Applied Physics.