Stability and Elasticity of Ultrathin Sphere-Patterned Block Copolymer Films
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866911859438780416 |
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| author | Qiao, Le Vega, Daniel A. Schmid, Friederike |
| author_facet | Qiao, Le Vega, Daniel A. Schmid, Friederike |
| contents | Sphere-patterned ultrathin block copolymers films are potentially interesting for a variety of applications in nanotechnology. We use self-consistent field theory to investigate the elastic response of sphere monolayer films with respect to in-plane shear, in-plane extension and compression deformations, and with respect to bending. The relations between the in-plane elastic moduli is roughly compatible with the expectations for two-dimensional elastic systems with hexagonal symmetry, with one notable exception: The pure shear and the simple shear moduli differ from each other by roughly 20%. Even more importantly, the bending constants are found to be negative, indicating that free-standing block copolymer membranes made of only sphere mono-layer are inherently unstable above the glass transition. Our results are discussed in view of experimental findings. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_18129 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Stability and Elasticity of Ultrathin Sphere-Patterned Block Copolymer Films Qiao, Le Vega, Daniel A. Schmid, Friederike Soft Condensed Matter Chemical Physics Computational Physics Sphere-patterned ultrathin block copolymers films are potentially interesting for a variety of applications in nanotechnology. We use self-consistent field theory to investigate the elastic response of sphere monolayer films with respect to in-plane shear, in-plane extension and compression deformations, and with respect to bending. The relations between the in-plane elastic moduli is roughly compatible with the expectations for two-dimensional elastic systems with hexagonal symmetry, with one notable exception: The pure shear and the simple shear moduli differ from each other by roughly 20%. Even more importantly, the bending constants are found to be negative, indicating that free-standing block copolymer membranes made of only sphere mono-layer are inherently unstable above the glass transition. Our results are discussed in view of experimental findings. |
| title | Stability and Elasticity of Ultrathin Sphere-Patterned Block Copolymer Films |
| topic | Soft Condensed Matter Chemical Physics Computational Physics |
| url | https://arxiv.org/abs/2404.18129 |