Institute for Molecular Systems Engineering and Advanced Materials, Heidelberg University, INF 225, 69120 Heidelberg, Germany.
Max Planck Institute for Medical Research, Jahnstrasse 29, 69120 Heidelberg, Germany.
ACS Appl Mater Interfaces. 2023 Feb 1;15(4):5620-5627. doi: 10.1021/acsami.2c19584. Epub 2023 Jan 23.
Nanoporous metals possess unique properties attributed to their high surface area and interconnected nanoscale ligaments. They are mostly fabricated by wet synthetic methods that are not universal to various metals and not free from impurities due to solution-based etching processes. Here, we demonstrate that the plasma treatment of metal nanoparticles formed by physical vapor deposition is a general route to form such films with many metals including the non-noble ones. The resultant nanoporous metallic films are free of impurities and possess highly curved ligaments and nanopores. The metal films are ultrathin, yet remarkably robust and very well connected, and thus are highly promising for various applications such as transparent conducting electrodes.
纳米多孔金属具有独特的性质，归因于其高表面积和互联的纳米级连接。它们主要通过湿合成方法制造，但这种方法并不普遍适用于各种金属，并且由于基于溶液的蚀刻过程，它们也不能避免杂质。在这里，我们证明了通过物理气相沉积形成的金属纳米粒子的等离子体处理是形成具有许多金属（包括非贵金属）的此类薄膜的通用途径。所得的纳米多孔金属薄膜不含杂质，并且具有高度弯曲的连接和纳米孔。这些金属薄膜很薄，但非常坚固且连接良好，因此非常有前途应用于各种领域，如透明导电电极。
