Gyroid-Forming Diblock Copolymers Confined in Cylindrical Geometry: A Case of Extreme Makeover for Domain Morphology
The self-assembly of gyroid-forming diblock copolymers confined in cylindrical geometry is studied using a combination of computer simulations and experiments. The simulations, based on a system qualitatively representative of poly(styrene-b-isoprene), are performed with cylindrical nanopores of dif...
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American Chemical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/68991 https://orcid.org/0000-0001-5911-6524 https://orcid.org/0000-0001-8137-1732 |
| _version_ | 1826206657094352896 |
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| author | Ma, Minglin Thomas, Edwin L. Yu, Bin Li, Baohui Jin, Qinghua Ding, Datong Shi, An-Chang Rutledge, Gregory C |
| author2 | Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies |
| author_facet | Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies Ma, Minglin Thomas, Edwin L. Yu, Bin Li, Baohui Jin, Qinghua Ding, Datong Shi, An-Chang Rutledge, Gregory C |
| author_sort | Ma, Minglin |
| collection | MIT |
| description | The self-assembly of gyroid-forming diblock copolymers confined in cylindrical geometry is studied using a combination of computer simulations and experiments. The simulations, based on a system qualitatively representative of poly(styrene-b-isoprene), are performed with cylindrical nanopores of different diameter (D) and surface selectivity. The effects of the pore size and surface selectivity on morphology are systematically investigated. Different morphological sequences are predicted for two gyroid-forming diblock copolymers. The experiments are carried out on two gyroid-forming poly(styrene-b-dimethylsiloxane) block copolymer samples confined in the core of continuous core−shell nanofibers of different diameters, which are obtained by a coaxial two-fluid electrospinning technique. The internal microphase-separated morphologies of these fibers are investigated by transmission electron microscopy (TEM). Both simulations and experiments demonstrate that a rich variety of structures spontaneously form for the gyroid-forming diblock copolymers, depending on the conditions of cylindrical confinement. Many of these confinement-induced structures are quite different from those of cylinder-forming or lamella-forming block copolymers. Simulations further show that these structures depend sensitively on the block copolymer composition, surface selectivity, and the ratio D/L0 where L0 is the period of the equilibrium gyroid phase. While the simulation and experimental systems are representative of different chemistries, the morphological predictions of simulations are qualitatively consistent with the experimental observations. |
| first_indexed | 2024-09-23T13:36:14Z |
| format | Article |
| id | mit-1721.1/68991 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:36:14Z |
| publishDate | 2012 |
| publisher | American Chemical Society |
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| spelling | mit-1721.1/689912022-09-28T14:57:49Z Gyroid-Forming Diblock Copolymers Confined in Cylindrical Geometry: A Case of Extreme Makeover for Domain Morphology Ma, Minglin Thomas, Edwin L. Yu, Bin Li, Baohui Jin, Qinghua Ding, Datong Shi, An-Chang Rutledge, Gregory C Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies Massachusetts Institute of Technology. Department of Chemical Engineering Massachusetts Institute of Technology. Department of Materials Science and Engineering Koch Institute for Integrative Cancer Research at MIT Rutledge, Gregory C. Rutledge, Gregory C. Ma, Minglin Thomas, Edwin L. The self-assembly of gyroid-forming diblock copolymers confined in cylindrical geometry is studied using a combination of computer simulations and experiments. The simulations, based on a system qualitatively representative of poly(styrene-b-isoprene), are performed with cylindrical nanopores of different diameter (D) and surface selectivity. The effects of the pore size and surface selectivity on morphology are systematically investigated. Different morphological sequences are predicted for two gyroid-forming diblock copolymers. The experiments are carried out on two gyroid-forming poly(styrene-b-dimethylsiloxane) block copolymer samples confined in the core of continuous core−shell nanofibers of different diameters, which are obtained by a coaxial two-fluid electrospinning technique. The internal microphase-separated morphologies of these fibers are investigated by transmission electron microscopy (TEM). Both simulations and experiments demonstrate that a rich variety of structures spontaneously form for the gyroid-forming diblock copolymers, depending on the conditions of cylindrical confinement. Many of these confinement-induced structures are quite different from those of cylinder-forming or lamella-forming block copolymers. Simulations further show that these structures depend sensitively on the block copolymer composition, surface selectivity, and the ratio D/L0 where L0 is the period of the equilibrium gyroid phase. While the simulation and experimental systems are representative of different chemistries, the morphological predictions of simulations are qualitatively consistent with the experimental observations. Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies (Contract DAAD-19-02-D-0002) United States. Army Research Office 2012-01-30T18:14:55Z 2012-01-30T18:14:55Z 2010-02 2010-02 Article http://purl.org/eprint/type/JournalArticle 0024-9297 1520-5835 http://hdl.handle.net/1721.1/68991 Ma, Minglin et al. “Gyroid-Forming Diblock Copolymers Confined in Cylindrical Geometry: A Case of Extreme Makeover for Domain Morphology.” Macromolecules 43.6 (2010): 3061-3071. https://orcid.org/0000-0001-5911-6524 https://orcid.org/0000-0001-8137-1732 en_US http://dx.doi.org/10.1021/ma9022586 Macromolecules Creative Commons Attribution-Noncommercial-Share Alike 3.0 http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf American Chemical Society Prof. Rutledge via Erja Kajosalo |
| spellingShingle | Ma, Minglin Thomas, Edwin L. Yu, Bin Li, Baohui Jin, Qinghua Ding, Datong Shi, An-Chang Rutledge, Gregory C Gyroid-Forming Diblock Copolymers Confined in Cylindrical Geometry: A Case of Extreme Makeover for Domain Morphology |
| title | Gyroid-Forming Diblock Copolymers Confined in Cylindrical Geometry: A Case of Extreme Makeover for Domain Morphology |
| title_full | Gyroid-Forming Diblock Copolymers Confined in Cylindrical Geometry: A Case of Extreme Makeover for Domain Morphology |
| title_fullStr | Gyroid-Forming Diblock Copolymers Confined in Cylindrical Geometry: A Case of Extreme Makeover for Domain Morphology |
| title_full_unstemmed | Gyroid-Forming Diblock Copolymers Confined in Cylindrical Geometry: A Case of Extreme Makeover for Domain Morphology |
| title_short | Gyroid-Forming Diblock Copolymers Confined in Cylindrical Geometry: A Case of Extreme Makeover for Domain Morphology |
| title_sort | gyroid forming diblock copolymers confined in cylindrical geometry a case of extreme makeover for domain morphology |
| url | http://hdl.handle.net/1721.1/68991 https://orcid.org/0000-0001-5911-6524 https://orcid.org/0000-0001-8137-1732 |
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