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

Overview

Journal Nanoscale Res Lett

Publisher Springer

Specialty Biotechnology

Date 2010 Jul 15

PMID 20628455

Citations 1

Authors

S A Eliziario

L S Cavalcante

J C Sczancoski

P S Pizani

J A Varela

J W M Espinosa

E Longo

Affiliations

Soon will be listed here.

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).

Citing Articles

From Gel to Crystal: Mechanism of HfO and ZrO Nanocrystal Synthesis in Benzyl Alcohol.

Goossens E, Aalling-Frederiksen O, Tack P, Van den Eynden D, Walsh-Korb Z, Jensen K J Am Chem Soc. 2024; 146(15):10723-10734.

PMID: 38588404 PMC: 11027147. DOI: 10.1021/jacs.4c00678.

References

Munoz Ramo D, Shluger A, Gavartin J, Bersuker G . Theoretical prediction of intrinsic self-trapping of electrons and holes in monoclinic HfO2. Phys Rev Lett. 2007; 99(15):155504. DOI: 10.1103/PhysRevLett.99.155504. View

Mohanty P, Landskron K . Periodic Mesoporous Organosilica Nanorice. Nanoscale Res Lett. 2010; 4(2):169-172. PMC: 2894019. DOI: 10.1007/s11671-008-9219-0. View

Vittadello M, Negro E, Lavina S, Pace G, Safari A, Di Noto V . Vibrational studies and properties of hybrid inorganic-organic proton conducting membranes based on Nafion and hafnium oxide nanoparticles. J Phys Chem B. 2008; 112(51):16590-600. DOI: 10.1021/jp804117w. View

Yan C, Liu J, Liu F, Wu J, Gao K, Xue D . Tube Formation in Nanoscale Materials. Nanoscale Res Lett. 2010; 3(12):473-80. PMC: 2893443. DOI: 10.1007/s11671-008-9193-6. View

LeLuyer C, Villanueva-Ibanez M, Pillonnet A, Dujardin C . HfO2:X (X = Eu(3+), Ce(3+), Y(3+)) sol gel powders for ultradense scintillating materials. J Phys Chem A. 2008; 112(41):10152-5. DOI: 10.1021/jp803339n. View