solar_cell PVA cross section Wildtype block_copolymer PDMS NTU Worcester_Polytechnic_Institute MagneticForceMicroscopy Patterns ContactMode EFM MESA structure KevlarFiber MolecularSelfAssembly Wafer GalliumPhosphide TCS Crystal MetalCompound FFM Polyimide Fet SiliconeOxide Water Piranha LiIonBattery FAPbI3 IIT-chennai Genetic Spain MeltingPoint Cell ScanningIon-ConductanceMicroscopy Non-ContactMode