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Title: Improving the zT value of thermoelectrics by nanostructuring: Tuning the nanoparticle morphology of Sb2Te3 by using ionic liquids
Authors: Schaumann, JulianLoor, ManuelÜnal, DeryaMudring, AnjaHeimann, StefanHagemann, UlrichSchulz, StephanMaculewicz, FranziskaSchierning, Gabi
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Issue Date: 2016
Published in: Dalton Transactions, Volume 46, Issue 3, Page 656-668
Publisher: Cambridge : Royal Society of Chemistry
Abstract: A systematic study on the microwave-assisted thermolysis of the single source precursor (Et2Sb)2Te (1) in different asymmetric 1-alkyl-3-methylimidazolium- and symmetric 1,3-dialkylimidazolium-based ionic liquids (ILs) reveals the distinctive role of both the anion and the cation in tuning the morphology and microstructure of the resulting Sb2Te3 nanoparticles as evidenced by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and X-ray photoelectron spectroscopy (XPS). A comparison of the electrical and thermal conductivities as well as the Seebeck coefficient of the Sb2Te3 nanoparticles obtained from different ILs reveals the strong influence of the specific IL, from which C4mimI was identified as the best solvent, on the thermoelectric properties of as-prepared nanosized Sb2Te3. This work provides design guidelines for ILs, which allow the synthesis of nanostructured thermoelectrics with improved performances.
Keywords: Energy dispersive X ray analysis; Ionic liquids; Nanoparticles; Scanning electron microscopy; Tuning; X ray analysis; X ray diffraction
DDC: 540
License: CC BY 3.0 Unported
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