Chungnam_National_University Pyroelectric DNA Polyethylene Au111 Sio2 HighAcpectRatio SThM nanomechanical University_of_Regensburg FrequencyModulation HafniumDioxide piezoelectric force microscopy self_assembly HardDiskMedia AdhesionForce TiO2 SrO CuParticle TemperatureControlledAFM HexacontaneFilm rubber AnodizedAluminumOxide temp chemical_compound Dental Austenite Vinylpyridine FuelCell Nickel temperature controller AFM Global_Comm NUS_Physics Gallium_Arsenide CuSubstrate