School of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People's Republic of China. Department of Scientific Research, Nanjing Huawei Medicine Technology Development co., LTD, Nanjing 210023, People's Republic of China.
Nanotechnology. 2017 Aug 4;28(31):315701. doi: 10.1088/1361-6528/aa7837. Epub 2017 Jun 8.
Ribbon-like nano-structures possess high aspect ratios, and thus have great potential in the development of high-performance microwave absorption (MA) materials that can effectively eliminate adverse electromagnetic radiation. However, these nano-structures have been scarcely constructed in the field of MA, because of the lack of efficient synthetic routes. Herein, we developed an efficient method to successfully construct polypyrrole (PPy) nano-ribbons using the self-assembly aggregates of a racemic surfactant as the seeds. The frequency range with a reflection loss value of lower than -10 dB reached 7.68 GHz in the frequency range of 10.32-18.00 GHz, and surpassed all the currently reported PPy nano-structures, as well as most other MA nano-materials. Through changing the amount of surfactant, both the nano-structures and MA performance can be effectively regulated. Furthermore, the reason behind the high-performance MA of PPy nano-ribbons has been deeply explored. It opens up the opportunity for the application of conducting polymer nano-ribbons as a lightweight and tunable high-performance MA material, especially in applications of special aircraft and flexible electronics.
带状纳米结构具有高纵横比，因此在开发高性能微波吸收 (MA) 材料方面具有巨大的潜力，这种材料可以有效地消除有害的电磁辐射。然而，由于缺乏有效的合成途径，这些纳米结构在 MA 领域很少被构建。在此，我们开发了一种有效的方法，成功地使用手性表面活性剂的自组装聚集体作为种子来构建聚吡咯 (PPy) 纳米带。在 10.32-18.00GHz 的频率范围内，反射损耗值低于-10dB 的频率范围达到了 7.68GHz，超过了目前所有报道的 PPy 纳米结构以及大多数其他 MA 纳米材料。通过改变表面活性剂的用量，可以有效地调节纳米结构和 MA 性能。此外，还深入探讨了 PPy 纳米带具有高 MA 性能的原因。这为将导电聚合物纳米带用作轻质且可调谐的高性能 MA 材料开辟了机会，特别是在特殊飞机和柔性电子等应用领域。
