Structural and Optothermal Properties of Iron Ditelluride Layered Structures in the Framework of the Lattice Compatibility Theory

K Ben Messaoud,K Boubaker,A Gantassi,M Amlouk,H Essaidi,A Colantoni,J Ouerfelli

doi:10.1155/2014/534307

K Ben Messaoud, K Boubaker + Show 5 more

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https://doi.org/10.1155/2014/534307

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Abstract

This study concerns structural and optothermal properties of iron ditelluride layered structures which were fabricated via a low-cost protocol. The main precursors were FeCl3· 6H2O and Fe2O3. After a heat treatment within a tellurium-rich medium at various temperatures (470°C, 500°C, and 530°C) during 24 h, classical analyses have been applied to the iron ditelluride layered structures. A good crystalline state with a preferential orientation of the crystallites along (111) direction has been recorded. Moreover, additional opto-thermal investigation and analyses within the framework of the Lattice Compatibility Theory gave plausible explanation for prompt temperature-dependent incorporation of tellurium element inside hematite elaborated matrices.

Highlights

Iron ditelluride is a good representative of crystalline transition metal ditelluride in the 3d series
Nanocrystalline iron ditelluride has been elaborated by Zhang et al [1] by a reaction of alkaline aqueous solutions dissolving elemental tellurium and iron (II) complex Na2[Fe(EDTA)] at 140∘C under atmospheric pressure, while Liu et al [2] used a hydrothermal coreduction method in order to produce room temperature magneticsensitive frohbergite iron ditelluride nanocrystallites [2] using N2H4⋅H2O as reductant
The actual study reports structural and optothermal properties of iron ditelluride layered structures which were developed by a simple process consisting on anneal amorphous iron oxide layers, predeposited by spray pyrolysis of FeCl3⋅ 6H2O based aqueous solution onto heated pyrex glass substrates, under tellurium atmosphere

Summary

Introduction

Iron ditelluride is a good representative of crystalline transition metal ditelluride in the 3d series. It has been identified as a conductive marcasite containing the narrow 3d band (about 1.1 eV). Nanocrystalline iron ditelluride has been elaborated by Zhang et al [1] by a reaction of alkaline aqueous solutions dissolving elemental tellurium and iron (II) complex Na2[Fe(EDTA)] at 140∘C under atmospheric pressure, while Liu et al [2] used a hydrothermal coreduction method in order to produce room temperature magneticsensitive frohbergite iron ditelluride nanocrystallites [2] using N2H4⋅H2O as reductant. This simple and low cost process has been used by Ouertani et al to obtain FeS2 and FeSe2 and allowed us to obtain FeTe2marcasite phase thin films [7, 8]

Experiment

Optical and Atomic Force Microscopy Analyses

Updated Analyses

Conflict of Interests