Device mechanical property self-assembly PVAP3HT HardDiskMedia HighAspect NUS_Physics Vortex molecular_self_assembly medical Implant atomic_steps ThermalDetectors cross section GaN Boundary Sperm CeNSE_IISc molecules Cancer LateralForce SolarCell Logo ScratchMode DIWafer LiftHeight Bio Water Silicon hard_disk Steps PtfeFilter MLCC Cross-section Sulfur