Huang, Feirong, Shuting Fan, Xiyang Li, Xinghao Qu, Yuqi Tian, Xuefeng Zhang, Zhidong Zhang, Xinglong Dong, and Tun Cao. "Enhanced dielectric and conductivity properties of carbon-coated SiC nanocomposites in the terahertz frequency range." Nanotechnology 32, no. 26 (2021): 265705.
Abstract
C-coated SiC nanocomposites (SiC@C NCs) were one-step synthesized under a mixture atmosphere of Ar and CH4 using a DC arc-discharge plasma method. The microstructure of the composites could be controlled by varying the volume ratio of Ar and CH4. A strong response to the terahertz (THz) field was observed due to the existence of a graphite shell. The dielectric properties of SiC@C NCs can be enhanced by altering the thickness of the graphite shell. The thicker graphite shell results in a stronger absorption of THz waves and an enhanced real part of conductivity. Fitting the measured conductivity data using the Drude–Smith model reveals that the carrier transport in the SiC@C NCs and its counterpart, the SiC nanoparticles, is dominated by backscattering. The SiC@C NCs with enhanced conductivity are believed to be fundamental materials for various functionalized optoelectronic devices.
for full paper see https://iopscience.iop.org/article/10.1088/1361-6528/abf070/meta
… Optical and dielectric properties of all the samples were
characterized using a commercial THz- TDS system, TeraPulse 4000 (TeraView Ltd, Cambridge, UK) [15, 16],
in transmission configuration which has a useable bandwidth extending from 0.06 to 4 THz …
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