Key Lab for Advanced Materials Processing Technology of Education Ministry, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China.
Nanoscale Res Lett. 2013 Oct 7;8(1):412. doi: 10.1186/1556-276X-8-412.
It is of great importance to construct a stable superhydrophobic surface with low sliding angle (SA) for various applications. We used hydrophobic carbon nanotubes (CNTs) to construct the superhydrophobic hierarchical architecture of CNTs on silicon micropillar array (CNTs/Si-μp), which have a large contact angle of 153° to 155° and an ultralow SA of 3° to 5°. Small water droplets with a volume larger than 0.3 μL can slide on the CNTs/Si-μp with a tilted angle of approximately 5°. The CNTs growing on planar Si wafer lose their superhydrophobic properties after exposing to tiny water droplets. However, the CNTs/Si-μp still show superhydrophobic properties even after wetting using tiny water droplets. The CNTs/Si-μp still have a hierarchical structure after wetting, resulting in a stable superhydrophobic surface.
构建具有低滑动角（SA）的稳定超疏水表面对于各种应用非常重要。我们使用疏水性碳纳米管（CNTs）在硅微柱阵列（CNTs/Si-μp）上构建了超疏水分级结构，其接触角为 153°至 155°，超低 SA 为 3°至 5°。体积大于 0.3μL 的小水滴可以在倾斜约 5°的 CNTs/Si-μp 上滑动。在暴露于小水滴后，生长在平面 Si 晶片上的 CNT 失去其超疏水性能。然而，即使使用小水滴润湿，CNTs/Si-μp 仍表现出超疏水性能。润湿后，CNTs/Si-μp 仍具有分层结构，从而形成稳定的超疏水表面。
