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Monoclinic zirconium oxide nanostructures having tunable band gap synthesized under extremely non-equilibrium plasma conditions
Onkar Mangla, Savita Roy
Physics Department, Daulat Ram College, University of Delhi, Delhi-110007, INDIA

Published: 30 August 2018 by MDPI AG in Proceedings in 1st International Online Conference on Nanomaterials session Synthesis
MDPI AG, Volume 3; 10.3390/IOCN_2018-1-05486
Abstract:

Zirconium oxide (ZrO2) is a wide and direct band gap semiconductor having potential to be used in making fuel cells, protective coatings for mirrors and optoelectronic devices. The optoelectronic devices fabricated on ZrO2 span wide optical range depending on the band gap of ZrO2 material. The band gap of ZrO2 can be tuned by fabricating it to nanoscale. In this paper, we synthesized the ZrO2 nanostructures on quartz substrate using ZrO2 ions produced by the ablation of ZrO2 pellet due to high temperature, high density and extremely non-equilibrium argon plasma in a modified dense plasma focus device. Uniformly distributed monoclinic ZrO2 nanostructures of average dimension ~ 14 nm have been obtained as found from X-ray diffraction and Scanning electron microscopy studies. The monoclinic phase of ZrO2 nanostructures is further confirmed from photoluminescence (PL) and Raman spectra. PL spectra show peaks in ultra-violet (UV) and near-UV regions with tunable band gap of nanostructures. Similar tunability of band gap has been observed from absorption spectra. The obtained structural, morphological and optical properties are correlated to investigate the potential applications of ZrO2 nanostructures in optoelectronic devices.

Keywords: optical, band gap, tunable, Spectra, monoclinic, Extremely, Zro2 Nanostructures
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Comments on this paper
Hicham Abou oualid
congratulations
Dear Authors,

This is a good paper.

Congrats

Jiye Fang
Q from Dr. Fang
An excellent work. Just a short question: in the introduction of your poster, it indicates that ZrO2 can be used to make fuel cells. May I check it in depth - Can it be used as electrode material (anode or cathode)? Thanks.

Onkar Mangla
Answer to Dr. Fang Query
Dear Dr. Fang

ZrO2 can be used as electrode material of fuel cell as an anode.

Jiye Fang
Q from Dr. Fang
Many thanks for your response.

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