Self-assembledMonolayer DeoxyribonucleicAcid Stiffness Biology Adhesion Gong NUS_Physics Sulfur bias_mode nanomechanical 3-hexylthiophene Temperature Metal-organicComplex Modulus DeflectionOptics VerticalPFM optoelectronics Mfm BTO Copolymer P3HT CalciumHydroxide FM_SKPM single_layer CompactDisk HfO2 LateralForceMicroscopy KelvinProbeForceMicroscopy plastic DomainSwitching temperature controller AFM ULCA DLaTGS PolyvinylideneFluoride lift_mode