Journal Article 2D materials Ag nanoflakes Research Support, Non-U.S. Gov't crack template domain-wall memory ferroelectric domain walls flexible perovskite solar cells fluid balance agent fluid dynamics interfacial heat transfer marangoni convection nitroxide radical patterning perovskite solar cells polar topological domains scalable blade‐coating technology self‐healing spiro‐OMeTAD thermal interface materials thermal percolation touch-screen displays transparent conductive electrode