Defects Platinum PUR StrontiuTitanate Beads SPMLabs Graphite biocompatible Holes NUSNNI Wafer block_copolymer molecular_self_assembly graphene_hybrid Regensburg CeNSE_IISc C36H74 InsulatorFilm Temasek_Lab lithography Array Sphere WPlug HydroGel Growing Zhi Composition plastic MolecularSelfAssembly Inorganic Collagen LDPE CopperFoil doped temperature_control