Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA.
School of Power and Mechanical Engineering, Wuhan University, 430072, Wuhan, China.
Sci Rep. 2017 Jul 10;7(1):4936. doi: 10.1038/s41598-017-04969-y.
The rapid development of wearable and disposable electronic devices and the rising awareness of environmental sustainability impose growing new demands on the nature degradability of current electronic and energy systems. Here we report a new type of flexible transparent conductive paper completely made from green and earth abundant materials which are also fully degradable and recyclable. Aluminum-doped zinc oxide (AZO) was deposited by low-temperature atomic layer deposition (ALD) as the transparent conductive oxide (TCO) layer on transparent cellulose nanofibril (CNF) papers. The mesoporous structure of the CNF paper rendered strong adhesion of the AZO layer and exhibited excellent mechanical integrity and electrical conductivity within a wide range of tensile and compressive strains. The AZO-CNF paper could be completely dissolved in warm city water after one-hour stirring, demonstrating an excellent nature degradability. A flexible and transparent triboelectric nanogenerator (TENG) was further fabricated using such AZO-CNF papers with a performance that was comparable to other synthetic polymer-based systems. This work illustrated a new and promising strategy of utilizing 100% green and degradable materials in novel electronic and energy harvesting devices.
可穿戴和一次性电子设备的快速发展以及对环境可持续性的认识不断提高，对当前电子和能源系统的自然可降解性提出了越来越高的新要求。在这里，我们报告了一种新型的柔性透明导电纸，它完全由绿色且在地球上含量丰富的材料制成，完全可降解且可回收。通过低温原子层沉积 (ALD) 将掺铝氧化锌 (AZO) 沉积在透明纤维素纳米纤维 (CNF) 纸上，作为透明导电氧化物 (TCO) 层。CNF 纸的介孔结构使 AZO 层具有很强的附着力，并在很大的拉伸和压缩应变范围内表现出优异的机械完整性和导电性。在搅拌一小时后，AZO-CNF 纸可完全溶解于温暖的城市水中，表现出优异的自然降解性。进一步使用这种 AZO-CNF 纸制造了柔性透明的摩擦纳米发电机 (TENG)，其性能可与其他基于合成聚合物的系统相媲美。这项工作说明了在新型电子和能量收集设备中使用 100%绿色和可降解材料的一种新的、有前途的策略。
