Copper Nanowires Array: Controllable Construction and Tunable Wettability

Copper nanowires array have been constructed using a porous alumina template approach. The morphologies of nanowires array could be modulated by introducing Sn 4+ ion except for adjusting the deposition time, dissolution time, and Cu 2+ ion concentrations. Scanning electron microscopy, transmission electron microscopy, and X-ray diffractometer are employed to characterize and analyze as-synthesized samples. The results indicate that the component of obtained nanowires is not Cu–Sn alloy but Cu. The wettability of as-prepared samples after silanization has been carefully investigated. It shows that the wettability has been greatly governed by their morphologies, which demonstrates the evolution of Wenzel to Cassie model. The relationship of the contact time with impact velocity has also been investigated.