Stable Thermotropic 3D and 2D Double Gyroid Nanostructures with Sub-2-nm Feature Size from Scalable Sugar-Polyolefin Conjugates

摘要: Ultra-low molecular weight disaccharide-polyolefin conjugates with cellobiose, lactose and maltose head groups atactic polypropene tails, such as 1, undergo a series of irreversible thermotropic order-order transitions increasing temperature to provide nanostructured phases in the sequence: lamellar (L), hexagonal perforated (HPL), double gyroid (DG) cylindrical (C). The DG phase displays exceptional stability at ambient features two interpenetrating sugar domain networks having sub-2-nm strut width lattice parameter, aDG , 13.1 nm. unique this extends further within ultrathin films all way down two-dimensional limit 15 nm which film thickness, l, is now less than surface-oriented unit cell height, hDG . In addition raising fundamental question what minimally constitutes Schoen triply periodic minimal surface lattice, these results serve establish class sugar-polyolefin new material platform for nanoscience nanotechnology.