VortexCore alkanes Insulator Filter Hexacontane Polydimethylsiloxane Polystyrene WS2 Pipette GaN vertical_PFM Water Wang molecular_self_assembly semifluorinated_alkane PolyimideFilm Perovskite CuParticle Bmp LithiumNiobate FM_KPFM conductive IcelandSpar Cancer Nanopattern SPMLabs Bacteria ScratchMode ForceVolumeMapping Chromium LifeScience FastScan ContactModeDot bias_mode Polyaniline