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    Single-digit-micrometer thickness wood speaker

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    Single-digit-micrometer thickness wood speaker.pdf (5.139Mb)
    No. of downloads: 136

    Date
    2019-11-08
    Author
    Gan, Wentao
    Chen, Chaoji
    Kim, Hyun-Tae
    Lin, Zhiwei
    Dai, Jiaqi
    Dong, Zhihua
    Zhou, Zhan
    Ping, Weiwei
    He, Shuaiming
    Xiao, Shaoliang
    Yu, Miao
    Hu, Liangbing
    Citation
    Gan, W., Chen, C., Kim, H. et al. Single-digit-micrometer thickness wood speaker. Nat Commun 10, 5084 (2019). https://doi.org/10.1038/s41467-019-13053-0
    DRUM DOI
    https://doi.org/10.13016/7jeh-yxdh
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    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.
    Notes
    Partial funding for Open Access provided by the UMD Libraries' Open Access Publishing Fund.
    URI
    http://hdl.handle.net/1903/26025
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    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility