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

Ultra‐low molecular weight disaccharide–polyolefin conjugates with cellobiose, lactose and maltose head groups and atactic polypropene tails, such as 1, undergo a series of irreversible thermotropic order–order transitions with increasing temperature to provide nanostructured phases in the sequence:...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2021-04, Vol.60 (16), p.8710-8716
Main Authors: Nowak, Samantha R., Lachmayr, Kätchen K., Yager, Kevin G., Sita, Lawrence R.
Format: Article
Language:English
Subjects:
Ambient temperature
Cellobiose
Conjugates
Disaccharides
Film thickness
gyroid
Interpenetrating networks
Lactose
Low molecular weights
Maltose
Minimal surfaces
Molecular weight
Nanotechnology
Polyolefins
self-assembly
Stability
Sugar
Thin films
ultrathin film
Unit cell
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Summary:Ultra‐low molecular weight disaccharide–polyolefin conjugates with cellobiose, lactose and maltose head groups and atactic polypropene tails, such as 1, undergo a series of irreversible thermotropic order–order transitions with increasing temperature to provide nanostructured phases in the sequence: lamellar (L), hexagonal perforated lamellar (HPL), double gyroid (DG) and hexagonal cylindrical (C). The DG phase displays exceptional stability at ambient temperature and features two interpenetrating sugar domain networks having a sub‐2‐nm strut width and a lattice parameter, aDG, of 13.1 nm. The unique stability of this DG phase extends further within ultrathin films all the way down to the two‐dimensional limit of 15 nm in which film thickness, l, is now less than the surface‐oriented unit cell height, hDG. In addition to raising the fundamental question of what minimally constitutes a Schoen triply periodic minimal surface and DG lattice, these results serve to establish the class of sugar–polyolefin conjugates as a new material platform for nanoscience and nanotechnology. Ultra‐low molecular weight disaccharide–polyolefin conjugates with cellobiose, lactose and maltose head groups and atactic polypropene tails, such as 1, provide highly ordered and exceptionally stable thermotropic hexagonal perforated lamellar (HPL) and double gyroid (DG) nanostructured phases. The unique stability of this DG phase extends further down to the two‐dimensional limit of 15 nm in which film thickness, l, is now less than the surface‐oriented unit cell height, hDG.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202016384