HexagonalBN Insulator Non-ContactMode LiftMode Wildtype sputter Terrace Sphere FrictionalForce semifluorinated alkane Calcite Fiber Sapphire Collagen MechanicalProperty HighAspect plastics light_emitting Sidewall GaN ContactMode NUS_Physics silicon_oxide Battery Titanate UTEM NusEce Bacterium HACrystal Ferroelectric ImideMonomer Gold PVAC Praseodymium Adhesion