Conductance LDPE STO piezoelectric force microscopy TPU Piezoelectric TCS Leakage Singapore NTU Adhesion SoftSample H-BN Al2O3 block_copolymer Polyvinylidene small_scan HighResolution PpLdpe 3-hexylthiophene PinpointPFM ito_film DiffractiveOpticalElements Formamidinium_lead_iodide Dopped mono_layer Self-assembledMonolayer CarbonNanotube InorganicCompound temperature controller AFM Annealing Polyvinylidene_fluoride Mosfet NUS Phthalocyanine