dielectric trench molecule Polyethylene layers Optic PVAP3HT ForceVolumeMapping Ferrite GaN Zagreb Flake Transparent cross section ForceVolumeImage medical NUSNNI SThM Conduct lithography FM_SKPM NusEce Tin disulfide PatternedSapphireSubstrat alkanes GranadaUniv Roughness Magnetic PinPointMode Device BloodCell Memory Composition mono_layer OrganicCompound SrTiO3