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Single-digit-micrometer thickness wood speaker

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 (Springer Nature, 2019-11-08)

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 ...