layers CaMnO3 OxideLayer DIWafer SelfAssembly PolyvinylAcetate NeodymiumMagnets Potential Vac norganic SolarCell Laser Polyaniline exfoliate Graphene AdhesionEnergy aluminum_nitride ConductiveAFM ImideMonomer Topography Steps Silver Piranha SThM temp graphene_hybrid PVA Memory FM-KPFM Tin sulfide atomic_layer ContactModeDot Bio Silicon IISCBangalore