Two-dimensional directed lamellar assembly in silicon- and fluorine-containing block copolymer with identical surface energies
Abstract A block copolymer (BCP) with specific monomer structures of fluoroacrylate polymers was designed by exploiting the inorganic superhydrophobicity and low glass transition temperature of polydimethylsiloxane (PDMS). With the use of a fluorine-containing block providing a surface tension as lo...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-12-01
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| Series: | NPG Asia Materials |
| Online Access: | https://doi.org/10.1038/s41427-023-00519-3 |
| _version_ | 1797274200994480128 |
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| author | Seungbae Jeon Seungjae Lee Junsu Kim Sungoh Eim Wooseop Lee Woo Hyun Nam Jeong Gon Son Du Yeol Ryu |
| author_facet | Seungbae Jeon Seungjae Lee Junsu Kim Sungoh Eim Wooseop Lee Woo Hyun Nam Jeong Gon Son Du Yeol Ryu |
| author_sort | Seungbae Jeon |
| collection | DOAJ |
| description | Abstract A block copolymer (BCP) with specific monomer structures of fluoroacrylate polymers was designed by exploiting the inorganic superhydrophobicity and low glass transition temperature of polydimethylsiloxane (PDMS). With the use of a fluorine-containing block providing a surface tension as low as that of PDMS (19.9 < $$\gamma$$ γ < 21.5 mN/m), PDMS-b-poly(2,2,3,3,3-pentafluoropropyl acrylate) (PDMS-b-PPeFPA) copolymer was synthesized to create a volume-symmetric lamellar structure. The compositional randomness of the BCP chains adsorbed onto the substrates provided well-balanced interfacial interactions toward the overlaid PDMS-b-PPeFPA ( $$\gamma$$ γ PDMS-ads ≈ $$\gamma$$ γ PPeFPA-ads). Under this symmetric confinement with simultaneous dual neutral interfaces, lamellar microdomains with a sub-10 nm half-pitch feature size were successfully oriented perpendicular to the interfaces at room temperature. We showed the response of the BCP films to a lateral electric field, demonstrating that the perpendicular lamellae were adaptively aligned along the electric vector within a short treatment period. Furthermore, the PDMS-b-PPeFPA system exhibited a remarkable etch contrast for O2 reactive ion etching, yielding unidirectionally aligned air–inorganic nanoarrays emanating from the perpendicular lamellae between the electrodes. This study reports a system engineering approach for conceiving highly immiscible, silicon- and fluorine-containing BCP whose components exhibit identical surface tensions ( $$\gamma$$ γ PDMS ≈ $$\gamma$$ γ PPeFPA) and for generating perpendicularly oriented lamellar microdomains due to substrate neutrality. |
| first_indexed | 2024-03-07T14:54:59Z |
| format | Article |
| id | doaj.art-e8ea0a46c50345d69c7e319719a2c69a |
| institution | Directory Open Access Journal |
| issn | 1884-4057 |
| language | English |
| last_indexed | 2024-03-07T14:54:59Z |
| publishDate | 2023-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | NPG Asia Materials |
| spelling | doaj.art-e8ea0a46c50345d69c7e319719a2c69a2024-03-05T19:29:56ZengNature PortfolioNPG Asia Materials1884-40572023-12-0115111010.1038/s41427-023-00519-3Two-dimensional directed lamellar assembly in silicon- and fluorine-containing block copolymer with identical surface energiesSeungbae Jeon0Seungjae Lee1Junsu Kim2Sungoh Eim3Wooseop Lee4Woo Hyun Nam5Jeong Gon Son6Du Yeol Ryu7Department of Chemical and Biomolecular Engineering, Yonsei UniversityDepartment of Chemical and Biomolecular Engineering, Yonsei UniversityDepartment of Chemical and Biomolecular Engineering, Yonsei UniversityDepartment of Chemical and Biomolecular Engineering, Yonsei UniversitySynchrotron Application Team, Pohang Accelerator LaboratorySoft Hybrid Materials Research Center, Korea Institute of Science and TechnologySoft Hybrid Materials Research Center, Korea Institute of Science and TechnologyDepartment of Chemical and Biomolecular Engineering, Yonsei UniversityAbstract A block copolymer (BCP) with specific monomer structures of fluoroacrylate polymers was designed by exploiting the inorganic superhydrophobicity and low glass transition temperature of polydimethylsiloxane (PDMS). With the use of a fluorine-containing block providing a surface tension as low as that of PDMS (19.9 < $$\gamma$$ γ < 21.5 mN/m), PDMS-b-poly(2,2,3,3,3-pentafluoropropyl acrylate) (PDMS-b-PPeFPA) copolymer was synthesized to create a volume-symmetric lamellar structure. The compositional randomness of the BCP chains adsorbed onto the substrates provided well-balanced interfacial interactions toward the overlaid PDMS-b-PPeFPA ( $$\gamma$$ γ PDMS-ads ≈ $$\gamma$$ γ PPeFPA-ads). Under this symmetric confinement with simultaneous dual neutral interfaces, lamellar microdomains with a sub-10 nm half-pitch feature size were successfully oriented perpendicular to the interfaces at room temperature. We showed the response of the BCP films to a lateral electric field, demonstrating that the perpendicular lamellae were adaptively aligned along the electric vector within a short treatment period. Furthermore, the PDMS-b-PPeFPA system exhibited a remarkable etch contrast for O2 reactive ion etching, yielding unidirectionally aligned air–inorganic nanoarrays emanating from the perpendicular lamellae between the electrodes. This study reports a system engineering approach for conceiving highly immiscible, silicon- and fluorine-containing BCP whose components exhibit identical surface tensions ( $$\gamma$$ γ PDMS ≈ $$\gamma$$ γ PPeFPA) and for generating perpendicularly oriented lamellar microdomains due to substrate neutrality.https://doi.org/10.1038/s41427-023-00519-3 |
| spellingShingle | Seungbae Jeon Seungjae Lee Junsu Kim Sungoh Eim Wooseop Lee Woo Hyun Nam Jeong Gon Son Du Yeol Ryu Two-dimensional directed lamellar assembly in silicon- and fluorine-containing block copolymer with identical surface energies NPG Asia Materials |
| title | Two-dimensional directed lamellar assembly in silicon- and fluorine-containing block copolymer with identical surface energies |
| title_full | Two-dimensional directed lamellar assembly in silicon- and fluorine-containing block copolymer with identical surface energies |
| title_fullStr | Two-dimensional directed lamellar assembly in silicon- and fluorine-containing block copolymer with identical surface energies |
| title_full_unstemmed | Two-dimensional directed lamellar assembly in silicon- and fluorine-containing block copolymer with identical surface energies |
| title_short | Two-dimensional directed lamellar assembly in silicon- and fluorine-containing block copolymer with identical surface energies |
| title_sort | two dimensional directed lamellar assembly in silicon and fluorine containing block copolymer with identical surface energies |
| url | https://doi.org/10.1038/s41427-023-00519-3 |
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