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Single-digit-micrometer thickness wood speaker.

Abstract：

:Thin films of several microns in thickness are ubiquitously used in packaging, electronics, and acoustic sensors. Here we demonstrate that natural wood can be directly converted into an ultrathin film with a record-small thickness of less than 10 μm through partial delignification followed by densification. Benefiting from this aligned and laminated structure, the ultrathin wood film exhibits excellent mechanical properties with a high tensile strength of 342 MPa and a Young's modulus of 43.6 GPa, respectively. The material's ultrathin thickness and exceptional mechanical strength enable excellent acoustic properties with a 1.83-times higher resonance frequency and a 1.25-times greater displacement amplitude than a commercial polypropylene diaphragm found in an audio speaker. As a proof-of-concept, we directly use the ultrathin wood film as a diaphragm in a real speaker that can output music. The ultrathin wood film with excellent mechanical property and acoustic performance is a promising candidate for next-generation acoustic speakers.

journal_name

Nat Commun

journal_title

Nature communications

authors

Gan W,Chen C,Kim HT,Lin Z,Dai J,Dong Z,Zhou Z,Ping W,He S,Xiao S,Yu M,Hu L

doi

10.1038/s41467-019-13053-0

subject

Has Abstract

pub_date

2019-11-08 00:00:00

pages

5084

issue

1

issn

2041-1723

pii

10.1038/s41467-019-13053-0

journal_volume

10

pub_type

杂志文章

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