Phonon Trapping in Pearl-Necklace-Shaped Silicon Nanowires. Small (2015)

Chunyang Miao , Guoan Tai , Jianxin Zhou , and Wanlin Guo
DOI: 10.1002/smll.201501956
C. Miao, Dr. G. Tai, Dr. J. Zhou, Prof. W. Guo
Key Laboratory of Intelligent Nano Materials and Devices of MOE
State Key Laboratory of Mechanics and Control of Mechanical Structures
Institute of Nano Science of Nanjing University of Aeronautics and Astronautics
Nanjing 210016 , China
Phonon Trapping in Pearl-Necklace-Shaped SiliconNanowires


A pearl-necklace-shaped silicon nanowire, in contrast to a smooth nanowire, presents a much lower thermal conductivity due to the phonon trapping effect. By precisely controlling the pearl size and density, this reduction can be more than 70% for the structures designed in the study, which provides a unique approach for designing high-performance nanoscale thermoelectric devices.

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