Abstract In this work we report macroscopic integration of reduced graphene oxide decorated by nickel nanoparticles (rGO/Ni) with self-assembled diphenylalanine (FF) peptide microtubes (PMTs). The rGO/Ni nanocomposite forms planar electrode-like structure on the FF PMT surface and improves its mechanical and physical characteristics, as evidenced by the electron and scanning probe microscopy techniques. In particular, the enhancement of helical structural stability and stiffness of PMTs in the presence of rGO/Ni has been found. The interaction between rGO/Ni and FF PMTs modifies electromechanical properties of the microtubes, so that a large radial piezoresponse untypical of the pristine FF PMTs appears. Furthermore, the introduction of rGO/Ni enhances electrical conductivity of FF PMTs. The energy diagram of the PMT/rGO/Ni structure suggests an easy path for the optical conversion and light energy harvesting. The technical approach considered in this work opens up a new perspective for the fabrication of macroscopic-scale integrated rGO/Ni and FF PMTs allowing a variety of functional bio-nanostructures to be designed.

中文翻译：

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由还原氧化石墨烯/尖峰镍纳米复合材料覆盖的自组装二苯丙氨酸肽微管：一种用于多功能应用的集成纳米生物材料

摘要 在这项工作中，我们报告了由镍纳米粒子 (rGO/Ni) 装饰的还原氧化石墨烯与自组装二苯丙氨酸 (FF) 肽微管 (PMT) 的宏观整合。rGO/Ni 纳米复合材料在 FF PMT 表面形成平面电极状结构并改善其机械和物理特性，如电子和扫描探针显微镜技术所证明的那样。特别是，已经发现在 rGO/Ni 存在下 PMT 的螺旋结构稳定性和刚度的增强。rGO/Ni 和 FF PMT 之间的相互作用改变了微管的机电特性，因此出现了原始 FF PMT 不典型的大径向压电响应。此外，rGO/Ni 的引入提高了 FF PMT 的导电性。PMT/rGO/Ni 结构的能量图为光转换和光能收集提供了一条简单的途径。这项工作中考虑的技术方法为宏观尺度集成 rGO/Ni 和 FF PMT 的制造开辟了新的视角，允许设计各种功能性生物纳米结构。