School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan Metropolitan City 689-798, Republic of Korea.
Sci Adv. 2018 Aug 3;4(8):eaas8772. doi: 10.1126/sciadv.aas8772. eCollection 2018 Aug.
We demonstrate ultrathin, transparent, and conductive hybrid nanomembranes (NMs) with nanoscale thickness, consisting of an orthogonal silver nanowire array embedded in a polymer matrix. Hybrid NMs significantly enhance the electrical and mechanical properties of ultrathin polymer NMs, which can be intimately attached to human skin. As a proof of concept, we present a skin-attachable NM loudspeaker, which exhibits a significant enhancement in thermoacoustic capabilities without any significant heat loss from the substrate. We also present a wearable transparent NM microphone combined with a micropyramid-patterned polydimethylsiloxane film, which provides excellent acoustic sensing capabilities based on a triboelectric voltage signal. Furthermore, the NM microphone can be used to provide a user interface for a personal voice-based security system in that it can accurately recognize a user's voice. This study addressed the NM-based conformal electronics required for acoustic device platforms, which could be further expanded for application to conformal wearable sensors and health care devices.
我们展示了具有纳米级厚度的超薄、透明且导电的混合纳米膜（NM），其由嵌入聚合物基质中的正交银纳米线阵列组成。混合 NM 显著提高了超薄聚合物 NM 的电和机械性能，使其可以紧密贴合人体皮肤。作为概念验证，我们提出了一种可附着于皮肤的 NM 扬声器，它在不损失基板任何显著热量的情况下，显著增强了热声性能。我们还提出了一种与微金字塔图案聚二甲基硅氧烷膜相结合的可穿戴透明 NM 麦克风，它基于摩擦电电压信号提供了出色的声传感性能。此外，NM 麦克风可用于为基于个人语音的安全系统提供用户界面，因为它可以准确识别用户的语音。本研究解决了用于声学器件平台的 NM 基共形电子学问题，这些问题可以进一步扩展到用于共形可穿戴传感器和医疗保健设备。
