Siqi Luo1,2, Zhidi Chen1,2, Zhichao Dong3,2, Yaxun Fan1, Yao Chen1, Bin Liu1,2, Cunlong Yu3, Chuxin Li3, Haoyu Dai1, Haofei Li1,2, Yilin Wang1,2, Lei Jiang3,2
1CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 China
2School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
3CAS Key Laboratory of Bio-inspired Materials and Interfacial Sciences, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Tóm tắt
AbstractInkjet printing of water‐based inks on superhydrophobic surfaces is important in high‐resolution bioarray detection, chemical analysis, and high‐performance electronic circuits and devices. Obtaining uniform spreading of a drop on a superhydrophobic surface is still a challenge. Uniform round drop spreading and high‐resolution inkjet printing patterns are demonstrated on superhydrophobic surfaces without splash or rebound after high‐speed impacting by introducing live‐oligomeric surfactant adhesion. During impact, the live‐oligomeric surfactant molecules aggregate into dynamic, wormlike micelle networks, which jam at the solid–liquid interface by entangling with the surface micro/nanostructures to pin the contact line and jam at the spreading periphery to keep the uniform spreading lamellar shape. This efficient uniform spreading of high‐speed impact drops opens a promising avenue to control drop impact dynamics and achieve high‐resolution printing.
