Hydrogel microphones for stealthy underwater listening

Yang Gao, Jingfeng Song, Shumin Li, Christian Elowsky, You Zhou, Stephen Ducharme, Yong Mei Chen, Qin Zhou, Li Tan

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Exploring the abundant resources in the ocean requires underwater acoustic detectors with a high-sensitivity reception of low-frequency sound from greater distances and zero reflections. Here we address both challenges by integrating an easily deformable network of metal nanoparticles in a hydrogel matrix for use as a cavity-free microphone. Since metal nanoparticles can be densely implanted as inclusions, and can even be arranged in coherent arrays, this microphone can detect static loads and air breezes from different angles, as well as underwater acoustic signals from 20 Hz to 3 kHz at amplitudes as low as 4 Pa. Unlike dielectric capacitors or cavity-based microphones that respond to stimuli by deforming the device in thickness directions, this hydrogel device responds with a transient modulation of electric double layers, resulting in an extraordinary sensitivity (217 nF kPa-1 or 24 μC N-1 at a bias of 1.0 V) without using any signal amplification tools.

Original languageEnglish (US)
Article number12316
JournalNature communications
Volume7
DOIs
StatePublished - Aug 24 2016

Fingerprint

Metal Nanoparticles
Hydrogel
Microphones
microphones
Acoustics
Underwater acoustics
underwater acoustics
Metal nanoparticles
Equipment and Supplies
Oceans and Seas
static loads
nanoparticles
cavities
sensitivity
Air
metals
stimuli
Amplification
resources
capacitors

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Gao, Y., Song, J., Li, S., Elowsky, C., Zhou, Y., Ducharme, S., ... Tan, L. (2016). Hydrogel microphones for stealthy underwater listening. Nature communications, 7, [12316]. https://doi.org/10.1038/ncomms12316

Hydrogel microphones for stealthy underwater listening. / Gao, Yang; Song, Jingfeng; Li, Shumin; Elowsky, Christian; Zhou, You; Ducharme, Stephen; Chen, Yong Mei; Zhou, Qin; Tan, Li.

In: Nature communications, Vol. 7, 12316, 24.08.2016.

Research output: Contribution to journalArticle

Gao, Y, Song, J, Li, S, Elowsky, C, Zhou, Y, Ducharme, S, Chen, YM, Zhou, Q & Tan, L 2016, 'Hydrogel microphones for stealthy underwater listening', Nature communications, vol. 7, 12316. https://doi.org/10.1038/ncomms12316
Gao, Yang ; Song, Jingfeng ; Li, Shumin ; Elowsky, Christian ; Zhou, You ; Ducharme, Stephen ; Chen, Yong Mei ; Zhou, Qin ; Tan, Li. / Hydrogel microphones for stealthy underwater listening. In: Nature communications. 2016 ; Vol. 7.
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