Zhang Si-Chao, Gao Huai-Ling, Zhang Long, Zhu Yin-Bo, Wu Ya-Dong, Liu Jian-Wei, Mao Li-Bo, Feng Mei, Dong Liang, Pan Zhao, Meng Xiang-Sen, Lu Yang, Yu Shu-Hong
Department of Chemistry, New Cornerstone Science Laboratory, Institute of Biomimetic Materials & Chemistry, Anhui Engineering Laboratory of Biomimetic Materials, Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Complex System Mechanics, University of Science and Technology of China, Hefei 230027, China.
Precis Chem. 2024 Oct 13;2(12):634-643. doi: 10.1021/prechem.4c00053. eCollection 2024 Dec 23.
One-dimensional (1D) functional nanowires are widely used as nanoscale building blocks for assembling advanced nanodevices due to their unique functionalities. However, previous research has mainly focused on nanowire functionality, while neglecting the structural stability and damage resistance of nanowire assemblies, which are critical for the long-term operation of nanodevices. Biomaterials achieve excellent mechanical stability and damage resistance through sophisticated structural design. Here, we successfully prepared a mechanically stabilized monolamella silver nanowire (Ag NW) film, based on a facile bubble-mediated assembly and nondestructive transfer strategy with the assistance of a porous mixed cellulose ester substrate, inspired by the hierarchical structure of biomaterial. Owing to the closely packed arrangement of Ag NWs combined with their weak interfaces, the monolamellar Ag NW film can be transferred to arbitrary substrates without damage. Furthermore, freestanding multilamellar Ag NW films with impressive damage resistance can be obtained from the monolamellar Ag NW film, through the introduction of bioinspired closely packed crossed-lamellar (CPCL) structure. This CPCL structure maximizes intra- and interlamellar interactions among Ag NWs ensuring efficient stress transfer and uniform electron transport, resulting in excellent mechanical durability and stable electrical properties of the multilamellar Ag NW films.
一维（1D）功能纳米线因其独特的功能而被广泛用作组装先进纳米器件的纳米级构建块。然而，以往的研究主要集中在纳米线的功能上，而忽略了纳米线组件的结构稳定性和抗损伤性，而这对于纳米器件的长期运行至关重要。生物材料通过复杂的结构设计实现了优异的机械稳定性和抗损伤性。在此，受生物材料分层结构的启发，我们借助多孔混合纤维素酯基板，基于简便的气泡介导组装和无损转移策略，成功制备了一种机械稳定的单层银纳米线（Ag NW）薄膜。由于Ag NW紧密排列且界面较弱，单层Ag NW薄膜可以无损转移到任意基板上。此外，通过引入受生物启发的紧密堆积交叉层状（CPCL）结构，可从单层Ag NW薄膜获得具有令人印象深刻抗损伤性的独立多层Ag NW薄膜。这种CPCL结构使Ag NW之间的层内和层间相互作用最大化，确保了有效的应力传递和均匀的电子传输，从而使多层Ag NW薄膜具有优异的机械耐久性和稳定的电学性能。
