Diffusion in Lamellae, Cylinders, and Double Gyroid Block Copolymer Nanostructures
| Autor: | Kuan-Hsuan Shen, Lisa M. Hall, Jonathan R. Brown |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Materials science
Nanostructure Polymers and Plastics Organic Chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Random walk 01 natural sciences 0104 chemical sciences Inorganic Chemistry Materials Chemistry Copolymer Diffusion (business) Composite material 0210 nano-technology Nanoscopic scale Gyroid |
| Zdroj: | ACS macro letters. 7(9) |
| ISSN: | 2161-1653 |
| Popis: | We study transport of penetrants through nanoscale morphologies motivated by common block copolymer morphologies, using confined random walks and coarse-grained simulations. Diffusion through randomly oriented grains is 1/3 for cylinder and 2/3 for lamellar morphologies versus an unconstrained (homopolymer) system, as previously understood. Diffusion in the double gyroid structure depends on the volume fraction and is 0.47-0.55 through the minority phase at 30-50 vol % and 0.73-0.80 through the majority at 50-70 vol %. Thus, among randomly oriented standard minority phase structures with no grain boundary effects, lamellae is preferable for transport. |
| Databáze: | OpenAIRE |
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