FrictionalForce mono_layer aluminum_nitride Hexylthiophene Microchannel Polymer Jason Sadowski fe_nd_b Materials NUS_Physics ContactModeDots rubber AM_SKPM Laser PolyStylene SiWafer PolymerPatterns self-assembly Lateral_Force_Microscopy Zagreb MoirePattern C36H74 CrAu Hexacontane AtomicLayer PECurve Composite Ram AmplitudeModulation Pore SelfAssembly PVA TemperatureControlledAFM OrganicCompound