Two-dimensional self-healing hydrogen-bond-based supramolecular polymer film

Self-healing materials have been developed over the past decade with the recovery ability after damage. However, most researches focused on the self-healing process at three-dimension. Herein, we prepare monolayer self-healing hydrogen-bond-based supramolecular polymer film and explore the self-healing process at the two-dimensional limit. The healing process, which can be reversibly repeated for at least three times, is influenced by the temperature, the molecule-substrate interaction and the substrate roughness. In the application, the monolayer self-healing polymer film can be used to modify the SiO₂ dielectric for copper phthalocyanine field effect transistor with improved mobility. This work will be valuable for developing two-dimensional functional self-healing materials in the future.