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Free keywords:
In situ, Lead telluride, Nano-bar, Nano-cube, Nano-layer, PbTe, TEM, Thermoelectric material
Abstract:
Nano-scaled thermoelectric materials attract significant interest due to their improved physical properties as compared to bulk materials. Well-shaped nanoparticles such as nano-bars and nano-cubes were observed in the known thermoelectric material PbTe. Their extended twodimensional nano-layer arrangements form directly in situ through electron-beam treatment in the transmission electron microscope. The experiments show the atomistic depletion mechanism of the initial crystal and the recrystallization of PbTe nanoparticles out of the microparticles due to the local atomic-scale transport via the gas phase beyond a threshold current density of the beam. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
