Deterministic Control of Surface Mounted Metal-Organic Frameworks Growth Orientation on Metallic and Insulating Surfaces

Surface-Mounted Metal-Organic Frameworks (SURMOFs) are promising materials with a wide range of applications and increasing interest in different technological fields. The use of SURMOFs as both the active and passive tail in electronic devices is one of the most exciting possibilities for such a hybrid material. In such a context, the adhesion, roughness, and crystallinity control of SURMOFs thin films are challenging and have limited their application on new functional electronic devices. Self-assembled monolayers (SAM), which ensure the effective attachment of the SURMOF onto substrates, also play a critical role that can profoundly affect SURMOFs layer’s growth mechanisms. Herein, we demonstrate that the deterministic control of SAMs chain length influences the preferential orientation of SURMOFs films. As the SAM’s chain length increases, the HKUST-1 thin films tend to change their preferential orientation from [111] towards [100] direction. We also confirm that such control can be achieved on both electrically conducting and insulating substrates, opening the possibility of having the very same preferential crystalline orientation on surfaces comprising different materials nature, which is of fundamental importance towards SURMOF-based functional electronic devices.