Li Mohan, Bonart Henning, Zellner Daniel, Toimil-Molares Maria Eugenia
Materials Research Department, GSI Helmholtzzentrum für Schwerionenforschung, 64291, Darmstadt, Germany.
Department of Materials Science, Technical University of Darmstadt, 64287, Darmstadt, Germany.
Small. 2025 Jun;21(22):e2411971. doi: 10.1002/smll.202411971. Epub 2025 Apr 14.
This study demonstrates the different wetting states that can be achieved by varying the diameter and density of nanowires in free-standing 3D gold nanowire networks. This network structure consists of nanowires oriented at 45° to the horizontal plane and interconnected from four different directions. Sessile drop measurements on these tailored nanostructured films show a transition from hydrophilic to hydrophobic behavior as porosity increases from 20% to 98%. With tailored porosity from 60% to 80%, this nanostructure can exhibit super-hydrophilicity. In addition, the highly porous (>90%) hydrophobic structures exhibit the rose-petal effect, where water droplets remain pinned to the surface. These novel results demonstrate the capability to precisely control surface wetting behavior through intricate designs of nanostructures, which are crucial for a wide range of applications, including liquid transport, microfluidic devices, and sensors.
本研究展示了通过改变独立式三维金纳米线网络中纳米线的直径和密度所能实现的不同润湿状态。这种网络结构由与水平面成45°角定向且从四个不同方向相互连接的纳米线组成。对这些定制的纳米结构薄膜进行的静滴测量表明，随着孔隙率从20%增加到98%，其行为从亲水性转变为疏水性。当孔隙率定制为60%至80%时，这种纳米结构可表现出超亲水性。此外，高度多孔（>90%）的疏水结构呈现出玫瑰花瓣效应，即水滴会固定在表面。这些新颖的结果证明了通过纳米结构的复杂设计精确控制表面润湿行为的能力，这对于包括液体传输、微流控装置和传感器在内的广泛应用至关重要。
