Herein, we present a simple, efficient, and economical approach for the preparation of superhydrophobic gold film embedded on polydimethylsiloxane (PDMS) sheets without the requirement of surface pretreatment. The reduction reaction between chloroauric acid (HAuCl₄) and sodium formate (HCOONa) at room temperature was performed to generate the aggregated gold microstructures on a PDMS sheet without chemical residuals. Superhydrophobic property was achieved when deposition time was reached to 2 h with water contact angle >160° and low contact angle hysteresis (H = 1.93°). Systematic investigations of the size, morphology, and mechanism of the generated gold films are presented. The generated gold film contains two different layers involving uniform spherical gold particles attached to the PDMS surface with the complex hierarchical structures on top. The complex structures play an important role in the superhydrophobic property, as they strongly promote the roughness to the PDMS surface. The durability of the fabricated gold film was elucidated by dropping ~7,200 waterdrops and external physical forces (e.g. stretch, bend, and twist). The main structures and their superhydrophobic properties have not disoriented after the tests. Moreover, the surface of the gold film demonstrated the potential applications as magnetical manipulation of droplets and a robust Surface enhanced Raman spectroscopy (SERS substrate).

在此，我们提出了一种无需表面预处理即可制备嵌入聚二甲基硅氧烷 (PDMS) 片材上的超疏水金膜的简单、高效和经济的方法。在室温下进行氯金酸 (HAuCl ₄ ) 和甲酸钠 (HCOONa)之间的还原反应，以在 PDMS 片材上生成聚集的金微结构，而没有化学残留物。当沉积时间达到 2 h，水接触角 >160° 和低接触角滞后（H = 1.93°）。系统地研究了生成的金膜的尺寸、形态和机制。生成的金膜包含两个不同的层，包括附着在 PDMS 表面的均匀球形金颗粒，顶部具有复杂的分层结构。复杂的结构在超疏水性中起着重要作用，因为它们强烈地促进了 PDMS 表面的粗糙度。通过滴下约 7,200 个水滴和外部物理力（例如拉伸、弯曲和扭曲）来阐明制造的金膜的耐用性。主要结构及其超疏水性能在测试后没有发生方向性变化。而且，