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Semiconductor nanowires have shown great potential in conversion of light or heat into electricity.The conversion of heat into electricity is based on the Seebeck effect and the thermoelectric materials ideally should have a figure of merit (ZT) over 3 in order to be competitive with conventional power generation technologies.ZT can be expressed by ZT =(S∧2 σT) / k.Where S is the Seebeck coefficient, σ is the electrical conductivity, k is the thermal conductivity and T is the absolute temperature.