Tailoring the electrical and dielectric properties of ZnO nanorods by substitution (original) (raw)
This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/authorsrights ZnO nanorods with substitution of different transition metal ions (Hg, Cd, Cu, Mn and Ni) were prepared by simple thermal decomposition process. Structural and microstructural properties of all the as-synthesized samples were characterized using the X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electrical conductivity and dielectric properties of all the samples have been studied over a wide frequency range 1 Hz to 1 MHz by complex impedance spectroscopic measurements at room temperature. The dc conductivity (σ dc) was extracted for all the samples by extrapolating frequency independent region of respective ac conductivity (σ ac) plot. Frequency variation of the dielectric loss (tanδ) of the samples has been obtained from impedance data and the same plot was further used to extract dielectric relaxation time (τ). Reasons for the tailored conductivity as well as relaxation time because of substitution in ZnO nanorods were discussed in detail.
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