Highly efficient thermophones based on freestanding single-walled carbon nanotube films

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Skolkovo Institute of Science and Technology
  • University of Texas at Dallas
  • Institut für Theoretische Astrophysik
  • Canatu Ltd.

Abstract

We present the state-of-the-art performance of air-coupled thermophones made of thin, freestanding films of randomly oriented single-walled carbon nanotubes (SWCNTs). The work demonstrates both experimentally and theoretically that extremely low heat capacity per unit area of SWCNT films allows centimeter-sized thermophones to achieve record sound pressures (normalized to the input power and geometry) in the frequency range of 1-100 kHz. Our SWCNT films have an aerogel structure. We systematically investigated their thermoacoustic performance as a function of the film thickness and purity. On the theoretical side, we obtained an analytic formula for the sound pressure in the ultrasound region and confirmed it by experiments and numerical simulations.

Details

Original languageEnglish
Pages (from-to)1158-1163
Number of pages6
JournalNanoscale Horizons
Volume4
Issue number5
Publication statusPublished - 1 Sep 2019
MoE publication typeA1 Journal article-refereed

ID: 36621731