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Mono-crystalline SnTe with micro-octahedroncharacteristic: One-pot facile synthesis and comprehensive crystallographic evidence

  • Qiang Su , HongQuan Liu , Ruxue Chen , Ying Song , Lan Ma , YiJie Gu , HongZhi Cui and Hongchao Wang
Published/Copyright: May 17, 2019
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 110 Issue 5

Abstract

In recent years, topological crystalline insulators have attracted increased attention due to practical demands of tunable electronic, spin electronic and thermoelectric devices. As an important topological crystalline insulator, mono-crystalline SnTe octahedra with {111} dominated surfaces, were successfully synthesized on a large scale via a surfactant-free hydrothermal synthesis route in this work. Important controlling factors for phase and morphology, i.e. reaction temperature, reactant concentration and stoichiometric ratio, are discussed in detail. The results indicated that high temperature is favorable for forming pure phase, and excessive Sn suppresses the appearance of SnTe with octahedral morphology. Lower reactant concentration is beneficial to preparing uniform SnTe octahedra via the selective growth mechanism. Crystallographic characteristics of the SnTe octahedra were investigated using focused ion beam, electron backscattered diffraction and transmission electron microscopy analysis. The hexagonal-like micro-plate (cut from an octahedron) was confirmed as mono-crystalline by the corresponding three Euler angle maps, the Kikuchi diffraction pattern and selected-area diffraction. It can be further deduced from the multiple experimental results that surfaces of octahedral SnTe are dominated by {111} crystallographic planes and the average size is 1–3 μm. Controllable mono-crystalline octahedra would effectively promote the development of topological crystalline insulators and their micro devices.

Keywords: SnTe; Hydrothermal synthesis; Micro-octahedron; Crystallographic analysis
∗Correspondence address, H.Q. Liu, College of Materials Science and Engineering, Shandong University of Science and Technology, Qian Wan Gang street 579, Qingdao, 266590, P.R. China, email: ; , Tel: +86-0532-86057123, Fax: +86-0532-86057123

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Received: 2018-08-15
Accepted: 2018-12-06
Published Online: 2019-05-17
Published in Print: 2019-05-15

© 2019, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111756
Keywords for this article
SnTe; Hydrothermal synthesis; Micro-octahedron; Crystallographic analysis

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Relationship between the variation in transformation temperatures, resistivity and dislocation density during thermal cycling of Ni50Ti50 shape memory alloy
  5. A critical analysis of the X-ray diffraction intensities in concentrated multicomponent alloys
  6. Thermodynamic investigations in the Al–Fe system: Thermodynamic modeling using CALPHAD
  7. Investigation of semi-solid microstructures of an A356 alloy containing rare-earth Gd during isothermal heat treatment
  8. Effects of double-ageing on the mechanical properties and microstructural evolution in the 1460 alloy
  9. Mechanical properties characterisation of AlSi10Mg parts produced by laser powder bed fusion additive manufacturing
  10. Tribological performance and corrosion behavior of aluminum alloy protected by Cr-doped diamond-like carbon thin film
  11. Effect of sintering temperature on the densification and optical properties of spark plasma sintered ZnSe ceramics
  12. Mono-crystalline SnTe with micro-octahedroncharacteristic: One-pot facile synthesis and comprehensive crystallographic evidence
  13. Finite element simulation of the residual stress in Ti6Al4V titanium alloy laser welded joint
  14. Short Communications
  15. Mechanism of the effect of electron beam melting on the distribution of oxygen, nitrogen and carbon in silicon
  16. Synthesis and study of structural, morphological, optical and toxicological properties of ferromagnetic cobalt oxide nanoparticles in liver carcinoma cell line
  17. DGM News
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