Stress-induced growth of single-crystalline lead telluride nanowires and their thermoelectric transport properties

Dedi,; Lee, Ping-Chung; Chien, Chin-Wen; Huang, Wei-Chia; Chen, Cheng-Lung; Harutyunyan, Syuzanna R.; Lee, Chih‐Hao; Chen, Yang‐Yuan

doi:10.1063/1.4813606

Cited by 19 publications

(11 citation statements)

References 37 publications

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“…We previously synthesized PbTe NWs from a PbTe thin film (TF) on a SiO 2 /Si substrate using a stress-induced method [ 42 , 43 ] based on a mechanism in which mismatched thermal expansion between a substrate and deposited film drove the mass flow along grain boundaries at thermal annealing temperatures. This innovative NW-growth method (which does not involve conventional templates, catalysts, or starting materials) enables us to control growth conditions for growing different diameters, shapes, and aspect ratios of single-crystalline NWs [ 44 , 45 ], thus enabling exploration of any possible novel TE property of Bi 2 Se 3 NWs.…”

Section: Methodsmentioning

confidence: 99%

“…The films were sealed in a vacuumed quartz tube at less than 5 × 10 −6 torr for annealing at 450 °C for 5 d, followed by cooling the furnace to room temperature. During the annealing process, Bi 2 Se 3 NWs grew from the film via the different thermal expansion coefficients of the Bi 2 Se 3 film (19 × 10 −6 /°C) [ 46 ] and the SiO 2 /Si substrate (0.5 × 10 −6 /°C)/(2.4 × 10 −6 /°C) [ 42 , 43 , 44 , 45 ].…”

Section: Methodsmentioning

confidence: 99%

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Thermoelectric Characteristics of A Single-Crystalline Topological Insulator Bi2Se3 Nanowire

et al. 2021

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The discovery of topological insulators (TIs) has motivated detailed studies on their physical properties, especially on their novel surface states via strong spin–orbit interactions. However, surface-state-related thermoelectric properties are rarely reported, likely because of the involvement of their bulk-dominating contribution. In this work, we report thermoelectric studies on a TI bismuth selenide (Bi2Se3) nanowire (NW) that exhibit a larger surface/volume ratio. Uniform single-crystalline TI Bi2Se3 NWs were successfully synthesized using a stress-induced growth method. To achieve the study of the thermoelectric properties of a nanowire (NW), including electrical conductivity (σ), Seebeck coefficient (S), and thermal conductivity (κ), a special platform for simultaneously performing all measurements on a single wire was designed. The properties of σ, S, and κ of a 200 nm NW that was well precharacterized using transmission electron microscope (TEM) measurements were determined using the four-probe method, the two-probe EMF across ∇T measurement, and the 3ω technique, respectively. The integrated TE properties represented by the figure of merit ZT (S2σT/κ) were found to be in good agreement with a theoretical study of Bi2Se3 NW.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Thermoelectric Characteristics of A Single-Crystalline Topological Insulator Bi2Se3 Nanowire

et al. 2021

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“…Till now there have been various reports on the ZT enhancement in one-dimensional materials. Dedi et al (2013) reported PbTe nanowire with diameter of 217 nm synthesized by stress induced method exhibited a maximal thermopower of −342 μ VK −1 at 375 K, which is two times larger than that of its bulk counterpart due to increase in the DOS of electrons near the Fermi level in the nanowires. The thermopower and power factor of the nanowires are shown in Figure 1.…”

Section: Research Progress On Nanostructured Te Materialsmentioning

confidence: 99%

Engineering Nanostructural Routes for Enhancing Thermoelectric Performance: Bulk to Nanoscale

et al. 2015

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Thermoelectricity is a very important phenomenon, especially its significance in heat-electricity conversion. If thermoelectric devices can be effectively applied to the recovery of the renewable energies, such as waste heat and solar energy, the energy shortage, and global warming issues may be greatly relieved. This review focusses recent developments on the thermoelectric performance of a low-dimensional material, bulk nanostructured materials, conventional bulk materials etc. Particular emphasis is given on, how the nanostructure in nanostructured composites, confinement effects in one-dimensional nanowires and doping effects in conventional bulk composites plays an important role in ZT enhancement.

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“…Various methods including chemical deposition (Lokhande, 1991 ; Tai et al, 2008 ), stress-induced method (Dedi et al, 2013 ), electrodeposition (Xiao et al, 2006 , 2007a ; Jung et al, 2011 ; Yang et al, 2011 ), galvanic displacement reaction (Chang et al, 2014 ), CVD (Fardy et al, 2007 ) have been used to fabricate PbTe nanostructures. The thermoelectric properties of these nanostructures are normally characterized in the form of nanowire arrays or highly-packed nanowire films (pellets).…”

Section: Introductionmentioning

confidence: 99%

“…The thermoelectric properties of these nanostructures are normally characterized in the form of nanowire arrays or highly-packed nanowire films (pellets). This is due to the difficulties in maintaining the single nanowire's structural and chemical composition during the lithographic contacting (Tai et al, 2008 ; Yang et al, 2011 ; Dedi et al, 2013 ). For example, p-type PbTe nanowires were fabricated using hydrothermal method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Thermoelectric Characterization of Lead Telluride Hollow Nanofibers

et al. 2018

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Lead telluride (PbTe) nanofibers were fabricated by galvanic displacement of electrospun cobalt nanofibers where their composition and morphology were altered by adjusting the electrolyte composition and diameter of sacrificial cobalt nanofibers. By employing Co instead of Ni as the sacrificial material, residue-free PbTe nanofibers were synthesized. The Pb content of the PbTe nanofibers was slightly affected by the Pb2+ concentration in the electrolyte, while the average outer diameter increased with Pb2+ concentration. The surface morphology of PbTe nanofibers was strongly dependent on the diameter of sacrificial nanofibers where it altered from smooth to rough surface as the Pb2+ concentration increased. Some of thermoelectric properties [i.e., thermopower (S) and electrical conductivity(σ)] were systematically measured as a function of temperature. Energy barrier height (Eb) was found to be one of the key factors affecting the thermoelectric properties–that is, higher energy barrier heights increased the Seebeck coefficient, but lowered the electrical conductivity.

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Stress-induced growth of single-crystalline lead telluride nanowires and their thermoelectric transport properties

Cited by 19 publications

References 37 publications

Thermoelectric Characteristics of A Single-Crystalline Topological Insulator Bi2Se3 Nanowire

Thermoelectric Characteristics of A Single-Crystalline Topological Insulator Bi2Se3 Nanowire

Engineering Nanostructural Routes for Enhancing Thermoelectric Performance: Bulk to Nanoscale

Synthesis and Thermoelectric Characterization of Lead Telluride Hollow Nanofibers

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