The improvement of thermoelectric materials that can directly convert wasted heat to electric energy may lead to one of the solutions for energy issues. For high performance in thermoelectric materials, it's required to easily conduct electricity while making it difficult for heat to pass through. Namely, high electrical conductivity and low thermal conductivity are needed. However, it has been very difficult for long because both conductivities are correlated. Now, nanostructuring was expected for the independent control of both conductions, but its methodology by nanostructuring was still unclear.
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