Thermoelectric properties of individual electrodeposited bismuth telluride nanowires

Abstract

For an electrodeposited bismuth telluride ͑Bi x Te 1−x ͒ nanowire from one batch with x found to be about 0.46, the Seebeck coefficient ͑S͒ was measured to be 15%-60% larger than the bulk values at temperature 300 K. For four other nanowires from a different batch with x Ϸ 0.54, S was much smaller than the bulk values. The electrical conductivity of the nanowires showed unusually weak temperature dependence and the values at 300 K were close to the bulk values. Below 300 K, phonon-boundary scattering dominated phonon-phonon Umklapp scattering in the nanowires, reducing the lattice thermal conductivity.

One-Dimensional Quantum Confinement Effect Modulated Thermoelectric Properties in InAs Nanowires

“…Unfortunately, despite much progress in the study of thermoelectric properties of nanomaterials, [7][8][9][15][16][17] there is no experimental work showing that the sharply peaked DOS in 1D or 0D materials can indeed be used to tailor the thermoelectric properties. In carbon nanotubes (CNTs)…”

A Review on Influence of Thermal Studies of Nanomaterials

“…70 nm). It was found that S 2 σ is about 6.2 x 10 -4 W/m-K 2 at 300 K which is a factor of 10 larger than the value reported for ntype Bi 2 Te 3 single nanowires [37] and a factor of 3 smaller than nanocrystalline Bi 2 Te 3 [38] (all these power factors were measured at similar σ).…”

Ultra-high resolution steady-state micro-thermometry using a bipolar direct current reversal technique

“…Low dimensional materials such as carbon nanotubes [1][2][3][4][5][6] , inorganic nanowires [7][8][9][10][11][12] , organic nanofibers [13][14][15] , superlattices 16,17 , and two dimensional materials [18][19][20][21][22][23][24] have been the focus of significant research interest over the past two decades due to their unique thermal transport properties which can be significantly different than in their bulk form. In addition to establishing fundamental structure-property relationships in these materials, these investigations have also enabled novel thermal device applications [25][26][27][28][29] .…”