Perovskite Techcomp Change Permalloy self-assembly Scratch Conductance CuSubstrate Jason FastScan Gallium Styrene Sphere Phenanthrene ChemicalCompound LateralForceMicroscopy Writing Plug Cell MagneticForce Solar TappingMode Beads SiliconOxide pulsed_laser_deposition LiftMode AlkaneFilm Pore kelvin probe force microscopy C60H122 OpticalModulator Vacuum Aluminum Polystyrene StyreneBeads