Morphology and Photoluminescence of HfO(2) Obtained by Microwave-Hydrothermal.

Nanoscale Research Letters
S A EliziárioE Longo

Abstract

In this letter, we report on the obtention of hafnium oxide (HfO(2)) nanostructures by the microwave-hydrothermal method. These nanostructures were analyzed by X-ray diffraction (XRD), field-emission gum scanning electron microscopy (FEG-SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectrometry (EDXS), ultraviolet-visible (UV-vis) spectroscopy, and photoluminescence (PL) measurements. XRD patterns confirmed that this material crystallizes in a monoclinic structure. FEG-SEM and TEM micrographs indicated that the rice-like morphologies were formed due to an increase in the effective collisions between the nanoparticles during the MH processing. The EDXS spectrum was used to verify the chemical compositional of this oxide. UV-vis spectrum revealed that this material have an indirect optical band gap. When excited with 488 nm wavelength at room temperature, the HfO(2) nanostructures exhibited only one broad PL band with a maximum at around 548 nm (green emission).

References

Jul 26, 2008·Nature Nanotechnology·Jang-Sik LeeFrank Caruso
Sep 25, 2008·The Journal of Physical Chemistry. a·C LeLuyerC Dujardin
Nov 8, 2008·Journal of Colloid and Interface Science·J C SczancoskiE Longo
Dec 1, 2008·Nanoscale Research Letters·Chenglin YanDongfeng Xue
Jan 1, 2008·Nanoscale Research Letters·Paritosh Mohanty, Kai Landskron

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Citations

Nov 29, 2013·ACS Applied Materials & Interfaces·Mohammad Mahbubur RahmanJosep Ferré-Borrull
Oct 17, 2012·Microscopy Research and Technique·V DhanasekaranV Ganesan
Sep 18, 2010·Nanoscale·Idalia Bilecka, Markus Niederberger
Jan 22, 2021·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Tracie L McGinnityRyan K Roeder

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electron paramagnetic resonance

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