Sphere Composite StrontiumTitanate OrganicSemiconductor optoelectronics Ecoli SKKU Logo C36H74 Yttria_stabilized_Zirconia Vac ShenYang Piezo AAO Pore LateralForce Genetic Vortex PetruPoni_Institute SelfAssembly SrO mechanical property single_layer Gold sputter Friction ScanningTunnelingMicroscopy PMNPT Worcester_Polytechnic_Institute Conduct Heating mechanical_property Hole PVAC PetruPoni