self-assembly CHRYSALIS_INC hydrocarbon phase_change Vacuum dielectric trench ElectroChemical PinpointNanomechanicalMode PetruPoni_Institute lift_mode Piezo molecular_beam Vanadate FrictionalForce DOE Tapping PhaseTransition Hysteresys flakes 3-hexylthiophene Zagreb MagneticForceMicroscopy Modulus Metal plastic PDMS cannabinoid ThermalProperties Patterns PS_PVAC Moire ContactMode Thermal YszSubstrate Sphere