Wenwen Fei, Jianxin Zhou, and Wanlin Guo.Low-voltage Driven Graphene Foam Thermoacoustic Speaker. Small 19,2252 (2015)

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Wenwen Fei, Jianxin Zhou, and Wanlin Guo Small 19,2252 (2015) DOI:10.1002/smll.201402982
Low-voltage Driven Graphene Foam Thermoacoustic Speaker

wlguo@nuaa.edu.cn
State Key Laboratory of Mechanics and Control of Mechanical Structures, Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education and Institute of Nanoscience, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People's Republic of China

Article first published online: 13 MAY 2015

Abstract

A low-voltage-driven thermoacoustic speaker is fabricated by W. Guo and co-workers using graphene foams synthesized by a chemical vapor deposition method. When an audio signal is applied to the speaker, sound waves are produced due to the periodicity of air vibrations induced by Joule heating. On page 2252, with the feasible tunability in structure and thermoacoustic performance, the graphene foam-based thermoacoustic speaker is shown to be promising for applications requiring flexible or ultrasonic acoustic devices.

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