Change P3HT AEAPDES BiVO4 GaP PFM Etch Morphology piezoelectric force microscopy MultiferroicMaterials TempControl alkanes OrganicCompound Lateral_Force_Microscopy DiffractiveOpticalElements Sulfur Subhajjit EFM STM ImideMonomer tip_bias_mode solar_cell InLiquid NiFe Electrical&Electronics ForceVolumeImage Vanadate India Polyurethane Patterns Christmas Non-ContactMode LDPE Phenanthrene PVA