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Controllable Hierarchical Surface Patterns of Supramolecular Hydrogels: Harnessing Buckling Instability by Confinement
- Source :
- Chemistry - A European Journal. 23:17444-17448
- Publication Year :
- 2017
- Publisher :
- Wiley, 2017.
-
Abstract
- Patterned surfaces of responsive polymers find applications in diverse fields. However, it is still a great challenge to fabricate hierarchical patterns with long-range orders. Herein controllable hierarchical surface patterns that can be fabricated by combining nanoembossing techniques with the surface instability of supramolecular hydrogels are presented. Nanoembossed nanostripe arrays of polyethylene glycol (PEG)-based polyurethane-urea supramolecular hydrogels are fabricated and exposed to water, whereby the lateral expansion of nanostripes is confined and leads to the formation of folded in-plane or out-of-plane patterns depending on the aspect ratios. The direction of folds is perpendicular to the nanostripes. Both the amplitude and the wavelength of out-of-plane folds are proportional to the thickness of nanostripes. Therefore, hierarchical structures, in which one periodicity is defined by the nanoembossing processes and the other is determined by surface buckling, can be quickly fabricated in supramolecular hydrogel thin films.
- Subjects :
- chemistry.chemical_classification
Chemistry
Organic Chemistry
Supramolecular chemistry
Nanotechnology
02 engineering and technology
General Chemistry
Polymer
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Instability
Aspect ratio (image)
Catalysis
0104 chemical sciences
Supramolecular assembly
Self-healing hydrogels
Perpendicular
Thin film
0210 nano-technology
Subjects
Details
- ISSN :
- 09476539
- Volume :
- 23
- Database :
- OpenAIRE
- Journal :
- Chemistry - A European Journal
- Accession number :
- edsair.doi.dedup.....930f3a6dfab9dff1961e2e80e94c0853