美国加州大学洛杉矶分校段镶锋团队近日取得一项新成果。经过不懈努力，他们制备了一种可延展可呼吸电子膜的高度可伸缩范德华薄膜。2022年2月25日出版的《科学》杂志发表了这项成果。

在该文中，研究人员报道了一种由非键范德华界面堆砌的二维纳米片组成的范德华薄膜。这种膜在堆砌的纳米片之间表现出滑动和旋转自由度，以保证其机械延展性和柔软性，而其间穿过的纳米孔道网络则赋予其渗透性和可呼吸性。

这种自支撑薄膜与软生物组织具有出众的机械相容性，其可以天然地与局部拓扑结构相适应，并无缝融合到具有丰富形状的生物表面，使生物具有电子功能，包括叶片门或者皮肤门晶体管。用这种薄膜制成的皮肤晶体管可对皮肤电位和电生理信号进行高保真监测和局部放大。

据介绍，将电子设备与不规则的软物体在形状上融合，对许多新兴技术非常关键。

附：英文原文

Title: Highly stretchable van der Waals thin films for adaptable and breathable electronic membranes

Author: Zhuocheng Yan, Dong Xu, Zhaoyang Lin, Peiqi Wang, Bocheng Cao, Huaying Ren, Frank Song, Chengzhang Wan, Laiyuan Wang, Jingxuan Zhou, Xun Zhao, Jun Chen, Yu Huang, Xiangfeng Duan

Issue&Volume: 2022-02-25

Abstract: The conformal integration of electronic systems with irregular, soft objects is essential for many emerging technologies. We report the design of van der Waals thin films consisting of staggered two-dimensional nanosheets with bond-free van der Waals interfaces. The films feature sliding and rotation degrees of freedom among the staggered nanosheets to ensure mechanical stretchability and malleability, as well as a percolating network of nanochannels to endow permeability and breathability. With an excellent mechanical match to soft biological tissues, the freestanding films can naturally adapt to local surface topographies and seamlessly merge with living organisms with highly conformal interfaces, rendering living organisms with electronic functions, including leaf-gate and skin-gate transistors. On-skin transistors allow high-fidelity monitoring and local amplification of skin potentials and electrophysiological signals.

DOI: abl8941

Source: https://www.science.org/doi/10.1126/science.abl8941