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Effect of precursor concentration and growth parameters on the morphology of ZnO rods grown by hydrothermal process

GOVINDAN POONGODI1,2,* , RANGASAMY MOHAN KUMAR2, RAMASAMY JAYAVEL3

Affiliation

  1. Department of Physics, Quaid-e-Millath Government College for Women, Chennai – 600 002, India
  2. Department of Physics, Presidency College, Chennai – 600 005, India
  3. Centre for Nanoscience and Technology, Anna University, Chennai – 600 025, India

Abstract

The systematic study of controllable morphology and crystallization of hydrothermally grown ZnO rod arrays by changing the precursor concentration, growth time and growth temperature was carried out. It is observed that by changing the concentration, the density and dimension of ZnO rods have been varied. On going from lower concentration to higher concentration, ZnO nanostructure changes from rod like to thin film morphology. It is also found that the length and diameter of ZnO rod follows a linear relation with growth time. As the growth temperature increases, the aspect ratio of the ZnO rods was found to be increased. The properties of ZnO rods and their growth mechanisms were studied using x-ray diffraction, HR SEM with EDAX, UV-Visible spectroscopy and photoluminescence measurements. Room temperature PL spectra show a strong UV emission peak indicating that the grown ZnO rods are highly crystalline..

Keywords

ZnO rods, Morphology, Hydrothermal, HRSEM, Optical properties.

Submitted at: Dec. 24, 2013
Accepted at: Sept. 11, 2014

Citation

GOVINDAN POONGODI, RANGASAMY MOHAN KUMAR, RAMASAMY JAYAVEL, Effect of precursor concentration and growth parameters on the morphology of ZnO rods grown by hydrothermal process, Journal of Optoelectronics and Advanced Materials Vol. 16, Iss. 9-10, pp. 1111-1115 (2014)