| 초록 |
Millimeter-length PbTe hollow nanofibers with thermoelectric properties were synthesized for the first time with a high-throughput method via a three-step sequential process of electrospinning, electrodeposition, and cationic exchange reaction. Electrospun Ag nanofibers were coated with electrodeposited Te to obtain silver telluride nanotubes, which then underwent cationic exchange reaction to obtain PbTe nanotubes. Variation of the silver-to-lead ratio in the AgxTey-PbTe nanocomposite during the cationic exchange reaction enabled control of the thermoelectric properties of the resulting hollow nanofibers. The highest Seebeck coefficient of 433 μV/K (at 300K) was measured in the synthesized nanocomposite mats with 30% Ag content, while pure PbTe nanotubes exhibited the highest power factor (56.7 μW/cmK2). The enhancement of thermoelectric properties and the composite crystallinity in relation to Ag content in the resulting nanocomposites are also elucidated. |
