Indent DNAProtein UnivCollegeLondon C_AFM exfoliate GranadaUniv StrontiumTitanate ImideMonomer IVSpectroscopy Stiffness Reduction MoS2 P3HT Non-ContactMode GaP mfm_amplitude ScanningSpreadingResistanceMicroscopy vertical_PFM lift_mode Pore Topography Ptfe PS_LDPE Solution Pyroelectric RedBloodCell pulsed_laser_deposition mechanical property Cell Praseodymium Vanadate DLaTGS Gong AlkaneFilm temperature controller AFM