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Rapid Synthesis of Undoped and Er Doped MoO 3 Layered Plates by Resistive Heating of Molybdenum: Structural and Optical Properties
Author(s) -
Mallet AnneFlore,
Cebriano Teresa,
Méndez Bianchi,
Piqueras Javier
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201800471
Subject(s) - cathodoluminescence , materials science , molybdenum , x ray photoelectron spectroscopy , doping , scanning electron microscope , raman spectroscopy , analytical chemistry (journal) , resistive touchscreen , optoelectronics , nanotechnology , composite material , optics , chemical engineering , chemistry , metallurgy , luminescence , physics , electrical engineering , chromatography , engineering
Resistive heating of molybdenum wires is used for the synthesis of alpha‐MoO 3 layered nano‐ and microplates. A high density of MoO 3 plates grow on the surface of the metallic wire in 2–3 min when an electric current density of the order of 10 4 Acm −2 flows through the Mo wire. During the current flow, a temperature gradient along the wire appears due to the heat dissipation at the electric contacts at both ends of the wire. The plates grow preferentially in the region heated at 450–500 °C. The synthesized MoO 3 plates are characterized by micro Raman spectroscopy, scanning electron microscopy, electron backscatter diffraction, cathodoluminescence, and X‐ray photoelectron spectroscopy. In addition, this quick synthesis approach enables the doping of the nanoplates. Setting in contact the Mo wire with Er 2 O 3 powders during the resistive heating, Er doping of the resulting MoO 3 is achieved. The Er incorporation during growth is revealed in the cathodoluminescence spectra of the plates, which show the characteristic emission lines of Er 3+ ions. Diffusion mechanisms related to the very rapid and effective growth by resistive heating of the undoped and Er doped molybdenum oxide plates, as compared with other thermal methods, are discussed.