Silver nanowires (AgNW) are prospective for the fabrication of flexible transparent conductive coatings. The main challenge is to ensure low sheet resistance of AgNW coatings at flexible substrates. Herein, a simple low‐temperature post‐treatment method is proposed for improving the conductivity and adhesion of AgNW coatings which is based on the deposition of distilled water (DI) with a small amount of dissolved polyvinyl alcohol (PVA). Capillary forces cause a decrease in the sheet resistance of AgNW coatings while the presence of PVA significantly improves the adhesion of nanowires to the flexible polyethylene terephthalate (PET) substrates. As a result, coatings with a transparency of 91% and a sheet resistance of 20 Ω sq‒1 are fabricated. The storage time of coatings in air is increased due to the presence of a thin layer of PVA on AgNW. After 90 days, the sheet resistance of post‐treated AgNW coatings is increased by 11 times, while the sheet resistance of untreated coatings is increased by more than 3000 times. The obtained AgNW coatings are utilized as flexible transparent heaters.

中文翻译：

---

利用毛细管力效应和聚乙烯醇提高AgNW柔性透明导电涂层的导电性和附着力


银纳米线（AgNW）有望用于制造柔性透明导电涂层。主要挑战是确保柔性基材上 AgNW 涂层的低薄层电阻。本文提出了一种简单的低温后处理方法，用于提高AgNW涂层的导电性和附着力，该方法基于蒸馏水（DI）和少量溶解的聚乙烯醇（PVA）的沉积。毛细管力导致 AgNW 涂层的薄层电阻降低，而 PVA 的存在显着提高了纳米线与柔性聚对苯二甲酸乙二醇酯 (PET) 基材的粘附力。结果，制备出透明度为 91%、方块电阻为 20 Ω sq-1 的涂层。由于 AgNW 上存在 PVA 薄层，涂层在空气中的储存时间增加。 90天后，经过后处理的AgNW涂层的方块电阻增加了11倍，而未经处理的涂层的方块电阻增加了3000倍以上。所得AgNW涂层可用作柔性透明加热器。