Hexatriacontane Magnetic Force Microscopy Bacteria LDPE cross section Vortex thermoplastic_elastomers Ptfe ThermalConductivity SetpointMode PhaseImaging lift_mode MagneticForce Optical NUS_Physics Photovoltaics Modulus ChemicalCompound mfm_amplitude C60H122 nanomechanical AtomicSteps CP-AFM MoS2 StyreneBeads Silicon Organic Roughness Array OpticalModulator Alloy Aggregated_molecules molecular_self_assembly Graphite Semiconductor