Tailoring InSb Nanowires for High Thermoelectric Performance Using AAO Template-Assisted Die Casting Process

Herein, we demonstrate a facile technique for the fabrication of one-dimensional indium antimonide (InSb) nanowires using anodic aluminium oxide (AAO) template-assisted vacuum die-casting method. The filling mechanism of the vacuum die-casting process is investigated on varying AAO pore structures t...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2022-06, Vol.12 (12), p.2032
Main Authors: Vivekanandan, Alangadu Kothandan, Lee, Chen-Wei, Wu, Rui-Zhe, Tsai, Wei-Han, Chen, Shih-Hsun, Chen, Yang-Yuan, Lin, Chia-Ting
Format: Article
Language:English
Subjects:
Aluminum
Aluminum oxide
anodic aluminium oxide
Chemical vapor deposition
Crystal structure
Die casting
Electrodes
Electrolytes
Etching
Fabrication
Geometry
Heat conductivity
Homogeneity
Indium antimonide
InSb
Intermetallic compounds
Morphology
Nanostructured materials
Nanotechnology
nanowire
Nanowires
Power factor
Reactive ion etching
Seebeck effect
Thermal conductivity
thermoelectric properties
Thermoelectricity
Vacuum
vacuum die-casting
Zincblende
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Summary:Herein, we demonstrate a facile technique for the fabrication of one-dimensional indium antimonide (InSb) nanowires using anodic aluminium oxide (AAO) template-assisted vacuum die-casting method. The filling mechanism of the vacuum die-casting process is investigated on varying AAO pore structures through different electrolytes. It is found that the anodizing electrolytes play a vital role in nanowire growth and structure formation. The as-obtained InSb nanowires from the dissolution process show a degree of high crystallinity, homogeneity, and uniformity throughout their structure. The TEM and XRD results elucidated the InSb zinc-blende crystal structure and preferential orientation along the c-axis direction. The thermoelectric characteristics of InSb nanowires were measured with a four-electrode system, and their resistivity, Seebeck coefficient, power factor, thermal conductivity, and ZT have been evaluated. Further, surface-modified nanowires using the reactive-ion etching technique showed a 50% increase in thermoelectric performance.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano12122032