Size‐Dependent Transport and Thermoelectric Properties of Individual Polycrystalline Bismuth Nanowires

Abstract

Nanofabrication methods and a device architecture are combined to allow for four‐point electric, thermoelectric, and electric field‐effect measurements on individual Bi nanowires. The figure shows a false‐color SEM image of a typical device used in this study, with the 11 Bi nanowires shown as a red → white gradient. The temperature dependence of the various transport properties as a function of nanowire width is investigated and discussed.

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)…”

Macro to Nano: Scaling Effects of Bi2Te3 Thermoelectric Generators for Applications in Space

“…Silicon Germanium (SiGe) has been shown to be reliably manufactured, but at the cost of an inferior performing TEG, albeit experimental and theoretical evidence has shown that SiGe nanowires TEG efficiency can be improved, by changing the doping and nanowire size. This is because manufacturing methods for this technology is far more developed and matured, and so its production is far more reliable [19] This meta-study has also highlighted a need for researchers to include more data in their papers or for data not entirely relevant to the paper be easily accessible for peer review and further analysis.…”

“…This is a result of the increased phonon scattering from the lower CSD of the wire which results in a shorter distance to travel before reflected phonons at the boundary interfere. Reduced electron transport which is the larger component of thermal transport also contributes to the reduction [19].…”

“…These effects arise from increased scattering of phonons and electrons as well as an increase in the density of electronic states near the Fermi level [18]. Compared to bulk, an array of nanowire thermoelements has an increased number of boundaries, these boundaries scatter phonons significantly more than electrons due to the larger de Broglie wavelength of electrons which is roughly an order of magnitude greater than the dominant phonons [19].…”

Thermopower Peculiarities of Uniaxial-Strained Bismuth Nanowires

“…NWs, many published works indicate that the idea of studying pure Bi and Bi based crystals as a material with promising thermoelectric efficiency and high sensitivity to pressure is still attractive [2][3][4][5][6][7]. The prospect of the thermoelectric application of NWs will require the ability to control their parameters.…”