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

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

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

Kuvaus

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.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut1158-1163
Sivumäärä6
JulkaisuNanoscale Horizons
Vuosikerta4
Numero5
TilaJulkaistu - 1 syyskuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 36621731