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- Title
Studies on Optical and Electrical Properties of Hafnium Oxide Nanoparticles.
- Authors
Jayaraman, Venkatachalam; Sagadevan, Suresh; Sudhakar, Rajesh
- Abstract
In this paper, the synthesis and physico-chemical properties of hafnium oxide nanoparticles (HfO NPs) are analyzed and reported. The synthesis was carried out by the precipitation route by using hafnium tetrachloride (HfCl) as precursor material with potassium hydroxide (KOH) dissolved in Millipore water. In the precipitation technique, the chemical reaction is comparatively simple, low-cost and non-toxic compared to other synthetic methods. The synthesized HfO NPs were characterized by using powder x-ray diffraction (PXRD), ultraviolet-visible (UV-Vis) spectroscopy, Raman analysis, and high-resolution transmission electron microscopy (HRTEM). The monoclinic structure of the HfO NPs was resolved utilizing x-ray diffraction (XRD). The optical properties were studied from the UV-Vis absorption spectrum. The optical band gap of the HfONPs was observed to be 5.1 eV. The Raman spectrum shows the presence of HfO NPs. The HRTEM image showed that the HfO NPs were of spherical shape with an average particle size of around 28 nm. The energy-dispersive x-ray spectroscopy (EDS) spectrum obviously demonstrated the presence of HfO NPs. Analysis and studies on the dielectric properties of the HfO NPs such as the dielectric constant, the dielectric loss, and alternating current (AC) conductivity were carried out at varying frequencies and temperatures.
- Subjects
HAFNIUM oxide; HAFNIUM compounds; TRANSITION metal compounds synthesis; NANOPARTICLES; NANOSTRUCTURED materials
- Publication
Journal of Electronic Materials, 2017, Vol 46, Issue 7, p4392
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-017-5432-x