The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform
Yue Wu - One of the best experts on this subject based on the ideXlab platform.
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Thermoelectric Properties of Silver Telluride–Bismuth Telluride Nanowire Heterostructure Synthesized by Site-Selective Conversion
Chemistry of Materials, 2014Co-Authors: Haiyu Fang, Haoran Yang, Yue WuAbstract:In this paper, we report a solution-phase synthesis of silver Telluride and bismuth Telluride nanowire heterostructure using tellurium (Te) nanowire as sacrificial template and site-selective conversion strategy. High-resolution transmission electron microscope studies confirm sharp interface with possible epitaxial growth between silver Telluride and bismuth Telluride regions. Through tuning the precursor amount (bismuth and silver precursors) during the reaction, the composition between silver Telluride and bismuth Telluride can be adjusted. Moreover, the mass produced powder of nanowire heterostructure is consolidated into nanocomposite pellets, and thermoelectric properties of the nanocomposite pellets are investigated between 300 and 400 K. Results show that our materials are p-type with reduced lattice thermal conductivity and a ZT of ∼0.41 at 400 K, which is the best reported value for p-type silver Telluride.
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synthesis and thermoelectric properties of compositional modulated lead Telluride bismuth Telluride nanowire heterostructures
Nano Letters, 2013Co-Authors: Haiyu Fang, Haoran Yang, Tianli Feng, Xiulin Ruan, Yue WuAbstract:We demonstrate the rational solution-phase synthesis of compositional modulated Telluride nanowire heterostructures containing lead Telluride (PbTe) and bismuth Telluride (Bi2Te3). By tuning the ratio between PbTe and Bi2Te3 through adjusting the amount of critical reactants and precursors during the synthesis, the influence of composition on the thermoelectric properties of the nanowire heterostructures has been investigated in hot pressed nanocomposite pellets. Measurements of the thermoelectric properties show strongly reduced thermal conductivity that leads to an enhanced thermoelectric figure of merit (ZT) of 1.2 at 620 K.
Charles R Martin - One of the best experts on this subject based on the ideXlab platform.
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template synthesis of bismuth Telluride nanowires
Advanced Materials, 1999Co-Authors: Shawn A Sapp, Brinda B Lakshmi, Charles R MartinAbstract:Abstract : We report the fabrication of thermoelectric bismuth Telluride nanowires using the template synthesis method. A simple electrodeposition procedure was used to produce the nanowires within the pores of an alumina filtration membrane. The resulting bismuth Telluride/alumina composite membranes constitute an array of thermoelectric nanowires surrounded by a thermally and electrically insulating matrix. The individual bismuth Telluride nanowires can be isolated by removal of the template membrane. These nanowires were characterized and found to be composed of stoichiometric bismuth Telluride.
Haiyu Fang - One of the best experts on this subject based on the ideXlab platform.
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Thermoelectric Properties of Silver Telluride–Bismuth Telluride Nanowire Heterostructure Synthesized by Site-Selective Conversion
Chemistry of Materials, 2014Co-Authors: Haiyu Fang, Haoran Yang, Yue WuAbstract:In this paper, we report a solution-phase synthesis of silver Telluride and bismuth Telluride nanowire heterostructure using tellurium (Te) nanowire as sacrificial template and site-selective conversion strategy. High-resolution transmission electron microscope studies confirm sharp interface with possible epitaxial growth between silver Telluride and bismuth Telluride regions. Through tuning the precursor amount (bismuth and silver precursors) during the reaction, the composition between silver Telluride and bismuth Telluride can be adjusted. Moreover, the mass produced powder of nanowire heterostructure is consolidated into nanocomposite pellets, and thermoelectric properties of the nanocomposite pellets are investigated between 300 and 400 K. Results show that our materials are p-type with reduced lattice thermal conductivity and a ZT of ∼0.41 at 400 K, which is the best reported value for p-type silver Telluride.
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synthesis and thermoelectric properties of compositional modulated lead Telluride bismuth Telluride nanowire heterostructures
Nano Letters, 2013Co-Authors: Haiyu Fang, Haoran Yang, Tianli Feng, Xiulin Ruan, Yue WuAbstract:We demonstrate the rational solution-phase synthesis of compositional modulated Telluride nanowire heterostructures containing lead Telluride (PbTe) and bismuth Telluride (Bi2Te3). By tuning the ratio between PbTe and Bi2Te3 through adjusting the amount of critical reactants and precursors during the synthesis, the influence of composition on the thermoelectric properties of the nanowire heterostructures has been investigated in hot pressed nanocomposite pellets. Measurements of the thermoelectric properties show strongly reduced thermal conductivity that leads to an enhanced thermoelectric figure of merit (ZT) of 1.2 at 620 K.
Shawn A Sapp - One of the best experts on this subject based on the ideXlab platform.
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template synthesis of bismuth Telluride nanowires
Advanced Materials, 1999Co-Authors: Shawn A Sapp, Brinda B Lakshmi, Charles R MartinAbstract:Abstract : We report the fabrication of thermoelectric bismuth Telluride nanowires using the template synthesis method. A simple electrodeposition procedure was used to produce the nanowires within the pores of an alumina filtration membrane. The resulting bismuth Telluride/alumina composite membranes constitute an array of thermoelectric nanowires surrounded by a thermally and electrically insulating matrix. The individual bismuth Telluride nanowires can be isolated by removal of the template membrane. These nanowires were characterized and found to be composed of stoichiometric bismuth Telluride.
Michael J. Reece - One of the best experts on this subject based on the ideXlab platform.
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Ultra low thermal conductivity of disordered layered p-type bismuth Telluride
Journal of Materials Chemistry C, 2013Co-Authors: Salvatore Grasso, Naohito Tsujii, Satofumi Maruyama, Kevin Simpson, Jibran Khaliq, Miriam Miranda, Takao Mori, Qinghui Jiang, Michael J. ReeceAbstract:Disordered layered p-type bismuth Telluride was obtained by high pressure (1 GPa) and high strain deformation along the c-axis direction of commercially available single crystals. After initial deformation the p-type bismuth Telluride flakes were subsequently fully densified by cold pressing (800 MPa at room temperature). As a result of the severe plastic deformation{,} the samples showed highly anisotropic electrical and thermal conductivities. In particular{,} the thermal conductivity measured along the pressing direction was as low as 0.34 W m-1 K-1{,} which is one of the lowest values reported for fully dense p-type bismuth Telluride. The full set of thermoelectric properties of the disordered bismuth antimony Telluride is critically discussed.
