Abstract
In this report, we introduce a nanomanipulation and fabrication technology, which is useful to characterize thermoelectrical properties of individual one-dimensional nanosystems such as metallic or semiconducting carbon nanotubes (CNTs) and nanowires (NWs). For such characterization, a one-stop measurement platform was constructed by focused ion beam (FIB) nanolithography after which a freestanding NW was picked up from a bundle of NWs and placed on the platform using a nanomanipulator. As a unique and unparalleled control for nanoscale one-dimensional systems, FIB-assisted nanomanipulator could make a direct access to nanoscale materials and structures. Subsequently, the four-point 3-ω method combined with a nanoheater was used to obtain electrical conductivity, thermal conductivity, and Seebeck coefficient, with which one can estimate the figure of merit of β-silicon carbide (SiC) NWs. We found that the thermal conductivity of a single β-SiC NW was 82 ± 6 W/mK. The Seebeck coefficient was also successfully measured to be −1.21 mV/K. With a measured electrical conductivity of the NW, the dimensionless thermoelectrical figure of merit (ZT) was estimated to be 0.12.
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Lee, KM., Choi, TY. (2013). Focused Ion Beam-Assisted Nanoscale Processing and Thermoelectrical Characterization. In: Wang, Z. (eds) FIB Nanostructures. Lecture Notes in Nanoscale Science and Technology, vol 20. Springer, Cham. https://doi.org/10.1007/978-3-319-02874-3_14
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DOI: https://doi.org/10.1007/978-3-319-02874-3_14
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