Polydimethylsiloxane EvatecAG SiWafer VortexCore PolyvinylideneFluoride TemperatureControlledAFM PFM Annealed Hexylthiophene temp Blend Adhesive Self-assembledMonolayer semifluorinated_alkane NanoLithography Nanofiber hard_disk_media YszSubstrate FrictionalForceMicroscopy nanomechanical CeNSE_IISc AmplitudeModulation Moire biocompatible Biofilm Mechanical Spincast HBN FuelCell PvdfBead Alkane atomic_steps Sio2 PVAC molecules