Carbon nanotube-based transparent thin film acoustic actuators and sensors

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Transparent thin film acoustic transducers that can effectively work as both acoustic actuators (speakers) and sensors (microphones) are developed in this study. The developed transducer consists of a piezoelectric poly(vinylidene fluoride) (PVDF) thin film coated with compliant carbon nanotube (CNT) based transparent conductors, which are fabricated by CNT acid treatment and layer-by-layer nanoassembly based surface modification of the PVDF substrates. The developed thin film transducers show excellent acoustic response over a broadband frequency range, and have the advantages of being transparent, flexible, extremely thin, and lightweight. The developed transducers could make a significant impact on room acoustics by enabling windows, computer screens, touch panels and posters themselves to server as invisible speakers and microphones.

Original languageEnglish (US)
Pages (from-to)626-631
Number of pages6
JournalSensors and Actuators, A: Physical
Issue number2
StatePublished - Nov 20 2006

Bibliographical note

Copyright 2008 Elsevier B.V., All rights reserved.


  • Carbon nanotube
  • Thin film acoustic transducer
  • Transparent microphone
  • Transparent speaker


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