期刊
NANO LETTERS
卷 13, 期 10, 页码 4795-4801出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl402408j
关键词
Carbon nano tube; thin yarn array; thermoacoustic chip; loudspeaker; earphone
类别
资金
- National Basic Research Program of China [2012CB932301]
- NSFC [51102147, 51102144, 90921012]
Aligned carbon nanotube (CNT) films drawn from CNT arrays have shown the potential as thermoacoustic loudspeakers. CNT thermoacoustic chips with robust structures are proposed to promote the applications. The silicon-based chips can play sou ad and fascinating rhythms by feeding alternating currents land audio signal to the suspending CNT thin yarn arrays across grooves in them. In additional to the thin yams, experiments further revealed more essential elements of the chips, the groove depth and the interdigital electrodes. The sound pressure depends on the depth of the grooves, and the thermal wavelength, can be introduced to define the influence-free depth. The interdigital fingers can effectively reduce the driving voltage, making the chips safe and easy to use. The chips were successfully assembled into earphones and have been working stably for about one year. The thermoacoustic chips can find many applications in consumer electronics and possibly improve the audiovisual experience.
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