TipBiasMode TPU GlassTemp OxideLayer Piezoelectric frequency_modulation Array SKPM ForceDistanceSpectroscopy ring shape NTU Fendb Croatia Conducting Techcomp Laser Forevision non_contact Flake FastScan Step Polydimethylsiloxane Regensburg Beads ThinFilm P3HT Ca10(PO4)6(OH)2 VinylAlcohol Implant PhaseChange TriGlycineSulphate Non-ContactMode ForceVolume Lattice Epoxy