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<p>Silver nanowire (Ag NW) networks are widely applied as flexible transparent conducting thin films because of the good transparency, outstanding conductivity, and satisfactory mechanical flexibility. However, the rapid surface oxidation of the Ag NWs severely restricts the service life of NW networks. Herein, we develop a solution-phase process for the preparation of ultrathin MgO@Ag core–shell nanowires, and magnesium fluoride is used as the starting material that can form MgO shells covering the surface of Ag NWs. The thickness of the MgO shells can be precisely controlled within a few atomic layers, which is confirmed by the EDS mapping and XPS analysis. The resistance to oxidation of Ag NWs is greatly improved by the dense and uniform MgO shells. In particular, the optical–electrical performance of MgO@Ag NW networks is better than that of Ag NW networks (before coating MgO: 9.3 Ω/sq. at 86.1%, after coating MgO: 6.7 Ω/sq. at 85.2%). The precise engineering of core–shell nanostructures provides a simple, low-cost, and scalable approach for the applications of Ag NWs in next-generation flexible optoelectronics.</p>

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Solution-grown MgO-coated silver nanowires with enhanced oxidation resistance and optoelectronic performance

  • 期刊论文

  • 发表日期：

    2025年8月10日

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  • Shihui Yu,
  • Bohang Liu,
  • Kangchun Tan,
  • Guoxin Fan,
  • Jiesong Li,
  • Xiyang Dong

摘要

Silver nanowire (Ag NW) networks are widely applied as flexible transparent conducting thin films because of the good transparency, outstanding conductivity, and satisfactory mechanical flexibility. However, the rapid surface oxidation of the Ag NWs severely restricts the service life of NW networks. Herein, we develop a solution-phase process for the preparation of ultrathin MgO@Ag core–shell nanowires, and magnesium fluoride is used as the starting material that can form MgO shells covering the surface of Ag NWs. The thickness of the MgO shells can be precisely controlled within a few atomic layers, which is confirmed by the EDS mapping and XPS analysis. The resistance to oxidation of Ag NWs is greatly improved by the dense and uniform MgO shells. In particular, the optical–electrical performance of MgO@Ag NW networks is better than that of Ag NW networks (before coating MgO: 9.3 Ω/sq. at 86.1%, after coating MgO: 6.7 Ω/sq. at 85.2%). The precise engineering of core–shell nanostructures provides a simple, low-cost, and scalable approach for the applications of Ag NWs in next-generation flexible optoelectronics.