FrictionalForceMicroscopy Vacuum ForceDistanceSpectroscopy Hexacontane lithography Mobile StrontiuTitanate electrospinning Annealing alkanes MechanicalProperty Wonseok Polymer LMF Nanopattern Butterfly Sulfur Pinpoint PFM sputter VinylAlcohol block_copolymer PolyvinylAcetate Inorganic_Compound thermal_property SetpointMode OpticalElement optoelectronics NCM HanyangUniv PVA ConductiveAFM STM membrane pulsed_laser_deposition Scratch