The conversion of light in sound plays a crucial role in spectroscopy, applied physics, and technology. In this paper, light-sound conversion in 3D graphene sponge through a photo-thermoacoustic mechanism is reported. It is shown that the unique combination of mechanical, optical, and thermodynamic properties of graphene assembled in a 3D sponge structure allows an unprecedented high efficiency conversion independent of light wavelength from infrared to ultraviolet. As a first application of this effect, a photothermal based graphene sponge loudspeaker is demonstrated, providing a full digital operation for frequencies from acoustic to ultrasound. The present results suggest a new pathway for light generation and control of sound and ultrasound signals potentially usable in a variety of new technological applications from high-fidelity loudspeaker and radiation detectors to medical devices.

High-Efficiency and Low Distortion Photoacoustic Effect in 3D Graphene Sponge / Giorgianni, Flavio; Vicario, Carlo; Shalaby, Mostafa; Tenuzzo, Lorenzo Donato; Marcelli, Augusto; Zhang, Tengfei; Zhao, Kai; Chen, Yongsheng; Hauri, Christoph; Lupi, Stefano. - In: ADVANCED FUNCTIONAL MATERIALS. - ISSN 1616-301X. - ELETTRONICO. - 28:2(2018), p. 1702652. [10.1002/adfm.201702652]

High-Efficiency and Low Distortion Photoacoustic Effect in 3D Graphene Sponge

Lupi, Stefano
2018

Abstract

The conversion of light in sound plays a crucial role in spectroscopy, applied physics, and technology. In this paper, light-sound conversion in 3D graphene sponge through a photo-thermoacoustic mechanism is reported. It is shown that the unique combination of mechanical, optical, and thermodynamic properties of graphene assembled in a 3D sponge structure allows an unprecedented high efficiency conversion independent of light wavelength from infrared to ultraviolet. As a first application of this effect, a photothermal based graphene sponge loudspeaker is demonstrated, providing a full digital operation for frequencies from acoustic to ultrasound. The present results suggest a new pathway for light generation and control of sound and ultrasound signals potentially usable in a variety of new technological applications from high-fidelity loudspeaker and radiation detectors to medical devices.
2018
acoustic devices; graphene; photoacoustic emission; photoacoustic speakers; ultrasound emission; Electronic, Optical and Magnetic Materials; Biomaterials; Condensed Matter Physics; Electrochemistry
01 Pubblicazione su rivista::01a Articolo in rivista
High-Efficiency and Low Distortion Photoacoustic Effect in 3D Graphene Sponge / Giorgianni, Flavio; Vicario, Carlo; Shalaby, Mostafa; Tenuzzo, Lorenzo Donato; Marcelli, Augusto; Zhang, Tengfei; Zhao, Kai; Chen, Yongsheng; Hauri, Christoph; Lupi, Stefano. - In: ADVANCED FUNCTIONAL MATERIALS. - ISSN 1616-301X. - ELETTRONICO. - 28:2(2018), p. 1702652. [10.1002/adfm.201702652]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1080516
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