Electrical properties of germanium oxide with α-quartz structure prepared by chemical precipitation
Source abstract
Abstract
Abstract Germanium dioxide (GeO 2 ) crystals were prepared by a chemical precipitation method at a relatively low-temperature (100 °C). The structure and electrical properties of the grown GeO 2 crystals were evaluated. GeO 2 crystals exhibit α-quartz type crystal structure with lattice parameters: a = 4.987(4) A and c = 5.652(5) A. DC conductivity variation measured in the temperature range of 120–300 K reveals the dielectric behavior of the GeO 2 crystals. The temperature dependent electrical conductivity curves exhibit two distinct regions indicative of two different types of electrical transport mechanisms. Analysis of the conductivity indicates that the small polaron and variable-range-hopping mechanisms are operative in 180–300 K and 120–180 K temperature regions, respectively.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Glass properties and applications · Luminescence Properties of Advanced Materials · Silicon Nanostructures and Photoluminescence
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
Show source-provided references
1. Photo-induced phenomena in GeO2 glass10.1016/j.jnoncrysol.2006.06.018 ↗
2. Photo-induced phenomena in sputtered GeO2 films10.1016/j.jnoncrysol.2004.10.002 ↗
3. Matrix isolation infrared spectroscopic and density functional theoretical calculations of the GeO2− and GeO2− anions10.1021/jp020030j ↗
4. Self-catalytic VLS growth and optical properties of single-crystalline GeO2 nanowire arrays10.1016/j.matlet.2007.07.034 ↗
5. GeO2 nanostructures fabricated by heating of Ge powders: Pt-catalyzed growth, structure, and photoluminescence10.1016/j.physe.2007.07.020 ↗
6. GeO2 nanotubes and nanorods synthesized by vapor phase reactions10.1016/j.matlet.2004.09.036 ↗
7. GeO2 nanowires and nanoneedles grown by thermal deposition without catalyst10.1088/0957-4484/16/11/010 ↗
8. Preparation and morphology of germanium oxide nanofibers
9. Germanium dioxide whiskers synthesized by laser ablation10.1063/1.124192 ↗
10. Synthesis and growth of germanium oxide nanoparticles in AOT reversed micelle10.1016/j.matlet.2006.05.007 ↗
11. Morphology controls of GeO2 particles precipitated by a facile acid-induced decomposition of germanate ions in aqueous madium10.1016/j.jcrysgro.2007.10.021 ↗
12. Growth and characterization of GeO2 single crystals with the quartz structure10.1016/S0022-0248(97)00224-8 ↗
13. Preparation of monodisperse GeO2 nanocubes in a reverse micelle system10.1021/cm052456r ↗
14. Cone-shaped structures of GeO2 fabricated by a thermal evaporation process10.1016/j.apsusc.2007.02.192 ↗
15. Structural studies of rutile-type metal dioxides10.1107/S0108768197001468 ↗
16. Rutile-type compounds. IV. SiO2, GeO2 and a comparison with other rutile-type structures10.1107/S0567740871005466 ↗
17. A neutron diffraction study of the thermal stability of the α-quartz-type structure in germanium dioxide10.1006/jssc.2002.9625 ↗
18. Crystal structures of the low-temperature quartz-type phases of SiO2 and GeO2 at elevated pressure10.1524/zkri.1992.198.3-4.177 ↗
19. The crystal structure of quartz-like GeO210.1107/S0365110X64002262 ↗
20. Structure refinement of GeO2 polymorphs at high pressures and temperatures by energy-dispersive spectra of powder diffraction10.1107/S0021889890011153 ↗
21. High pressure induced phase transformation of SiO2 and GeO2: difference and similarity10.1016/j.jpcs.2003.12.019 ↗
22. Ion irradiation-induced amorphization of two GeO2 polymorphs10.1016/S0168-583X(00)00607-8 ↗
23. Transformation of germanium to fluogermanates10.1007/s00339-009-5411-z ↗
24. Low-temperature chemical synthesis and microstructure analysis of GeO2 crystals with α-quartz structure10.1021/cg8010037 ↗
25. Self-assembly and phase behavior of germanium oxide nanoparticles in basic aqueous solutions10.1021/la062828q ↗
26. Mott · 1979
27. Effect of structure and size on the electrical properties of nanocrystalline WO3 films10.1021/am1004514 ↗
28. Conduction in glasses containing transition metal ions10.1016/0022-3093(68)90002-1 ↗
29. Non-adiabatic small polaron hopping conduction in Nb-doped TiO2 thin film10.1016/j.physb.2008.12.034 ↗