School of Mechanical and Electronic Engineering, Wuhan University of Technology , 122 Luoshi Road, Wuhan, 430070, P. R. China.
ACS Appl Mater Interfaces. 2013 Nov 13;5(21):10633-42. doi: 10.1021/am403534z. Epub 2013 Oct 15.
Heterohierarchical micro/nanostructure tetragonal array consisted of engineering materials of microprotrusion-like Cu and secondary nanostructured dendrite Ag have been fabricated via a primary cell-induced deposition and a facile galvanic displacement reaction combined with photolithography technique on Cu foil. Confined by the circle microwell tetragonal array of the photoresist template, regular microprotrusion-like Cu with the tunable size of diameter can be easily deposited on the surface of Cu foil. Then, the secondary dendritic Ag nanostructures in situ grow on the surface of microprotrusion via a galvanic displacement reaction, leading to the formation of heterohierarchical micro/nanostructure tetragonal array, which is similar to the surface microstructure of the lotus leaf. Inspired by this novel surface structure of imitating lotus leaf, its wettability has been systematically investigated. The results indicate that the fabricated heterohierarchical micro/nanostructure regular array after the surface fluoration presents a remarkable superhydrophobic performance. Initiated from its superhydrophobicity, an excellent self-cleaning property has also been demonstrated. In addition, the durability of the superhydrophobic surfaces is examined in the wide pH range of corrosive liquids. Notably, the fabricated superhydrophobic surface can be potentially used as concentrators, which presents a great perspective in the field of analysis through employing the SERS detection as an example.
通过在 Cu 箔上结合使用一次电池诱导沉积和简单的电置换反应以及光刻技术，制备了由微突起状 Cu 和二次纳米枝晶 Ag 组成的异质分级微/纳结构四方阵列。在光刻胶模板的圆微井四方阵列的限制下，可在 Cu 箔表面上轻松沉积具有可调直径的规则微突起状 Cu。然后，通过电置换反应，二次枝晶 Ag 纳米结构原位生长在微突起的表面上，从而形成异质分级微/纳结构四方阵列，其类似于荷叶的表面微观结构。受这种模仿荷叶的新型表面结构的启发，系统地研究了其润湿性。结果表明，经过表面氟化处理的所制备的异质分级微/纳结构规则阵列呈现出显著的超疏水性。从其超疏水性出发，还证明了其具有出色的自清洁性能。此外，还在腐蚀性液体的宽 pH 范围内检查了超疏水性表面的耐用性。值得注意的是，所制备的超疏水表面可潜在用作集热器，通过采用 SERS 检测作为示例，在分析领域具有广阔的应用前景。
