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A versatile acoustically active surface based on piezoelectric microstructures

We demonstrate a versatile acoustically active surface consisting of an ensemble of piezoelectric microstructures that are capable of radiating and sensing acoustic waves. A freestanding microstructure array embossed in a single step on a flexible piezoelectric sheet of polyvinylidene fluoride (PVDF...

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Autores principales: Han, Jinchi, Saravanapavanantham, Mayuran, Chua, Matthew R., Lang, Jeffrey H., Bulović, Vladimir
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9135689/
https://www.ncbi.nlm.nih.gov/pubmed/35646386
http://dx.doi.org/10.1038/s41378-022-00384-0
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author Han, Jinchi
Saravanapavanantham, Mayuran
Chua, Matthew R.
Lang, Jeffrey H.
Bulović, Vladimir
author_facet Han, Jinchi
Saravanapavanantham, Mayuran
Chua, Matthew R.
Lang, Jeffrey H.
Bulović, Vladimir
author_sort Han, Jinchi
collection PubMed
description We demonstrate a versatile acoustically active surface consisting of an ensemble of piezoelectric microstructures that are capable of radiating and sensing acoustic waves. A freestanding microstructure array embossed in a single step on a flexible piezoelectric sheet of polyvinylidene fluoride (PVDF) leads to high-quality acoustic performance, which can be tuned by the design of the embossed microstructures. The high sensitivity and large bandwidth for sound generation demonstrated by this acoustically active surface outperform previously reported thin-film loudspeakers using PVDF, PVDF copolymers, or voided charged polymers without microstructures. We further explore the directivity of this device and its use on a curved surface. In addition, high-fidelity sound perception is demonstrated by the surface, enabling its microphonic application for voice recording and speaker recognition. The versatility, high-quality acoustic performance, minimal form factor, and scalability of future production of this acoustically active surface can lead to broad industrial and commercial adoption for this technology. [Image: see text]
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spelling pubmed-91356892022-05-28 A versatile acoustically active surface based on piezoelectric microstructures Han, Jinchi Saravanapavanantham, Mayuran Chua, Matthew R. Lang, Jeffrey H. Bulović, Vladimir Microsyst Nanoeng Article We demonstrate a versatile acoustically active surface consisting of an ensemble of piezoelectric microstructures that are capable of radiating and sensing acoustic waves. A freestanding microstructure array embossed in a single step on a flexible piezoelectric sheet of polyvinylidene fluoride (PVDF) leads to high-quality acoustic performance, which can be tuned by the design of the embossed microstructures. The high sensitivity and large bandwidth for sound generation demonstrated by this acoustically active surface outperform previously reported thin-film loudspeakers using PVDF, PVDF copolymers, or voided charged polymers without microstructures. We further explore the directivity of this device and its use on a curved surface. In addition, high-fidelity sound perception is demonstrated by the surface, enabling its microphonic application for voice recording and speaker recognition. The versatility, high-quality acoustic performance, minimal form factor, and scalability of future production of this acoustically active surface can lead to broad industrial and commercial adoption for this technology. [Image: see text] Nature Publishing Group UK 2022-05-26 /pmc/articles/PMC9135689/ /pubmed/35646386 http://dx.doi.org/10.1038/s41378-022-00384-0 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Han, Jinchi
Saravanapavanantham, Mayuran
Chua, Matthew R.
Lang, Jeffrey H.
Bulović, Vladimir
A versatile acoustically active surface based on piezoelectric microstructures
title A versatile acoustically active surface based on piezoelectric microstructures
title_full A versatile acoustically active surface based on piezoelectric microstructures
title_fullStr A versatile acoustically active surface based on piezoelectric microstructures
title_full_unstemmed A versatile acoustically active surface based on piezoelectric microstructures
title_short A versatile acoustically active surface based on piezoelectric microstructures
title_sort versatile acoustically active surface based on piezoelectric microstructures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9135689/
https://www.ncbi.nlm.nih.gov/pubmed/35646386
http://dx.doi.org/10.1038/s41378-022-00384-0
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