Two-dimensional superstructures of silica cages
Despite extensive studies on mesoporous silica since the early 1990s, the synthesis of two‐dimensional (2D) silica nanostructures remains challenging. Here, mesoporous silica is synthesized at an interface between two immiscible solvents under conditions leading to the formation of 2D superstructure...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/142824 |
| _version_ | 1811677684213743616 |
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| author | Aubert, Tangi Ma, Kai Tan, Kwan Wee Wiesner, Ulrich |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Aubert, Tangi Ma, Kai Tan, Kwan Wee Wiesner, Ulrich |
| author_sort | Aubert, Tangi |
| collection | NTU |
| description | Despite extensive studies on mesoporous silica since the early 1990s, the synthesis of two‐dimensional (2D) silica nanostructures remains challenging. Here, mesoporous silica is synthesized at an interface between two immiscible solvents under conditions leading to the formation of 2D superstructures of silica cages, the thinnest mesoporous silica films synthesized to date. Orientational correlations between cage units increase with increasing layer number controlled via pH, while swelling with oil and mixed surfactants increase micelle size dispersity, leading to complex clathrate type structures in multilayer superstructures. The results suggest that a three‐dimensional (3D) crystallographic registry within cage‐like superstructures emerges as a result of the concerted 3D co‐assembly of the organic and inorganic components. Mesoporous 2D superstructures can be fabricated over macroscopic film dimensions and stacked on top of each other. The realization of previously inaccessible mesoporous silica heterostructures with separation or catalytic properties unachievable via conventional bulk syntheses is envisioned. |
| first_indexed | 2024-10-01T02:41:17Z |
| format | Journal Article |
| id | ntu-10356/142824 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:41:17Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1428242023-07-14T15:54:36Z Two-dimensional superstructures of silica cages Aubert, Tangi Ma, Kai Tan, Kwan Wee Wiesner, Ulrich School of Materials Science and Engineering Engineering::Materials 2D Materials Dual Structures Despite extensive studies on mesoporous silica since the early 1990s, the synthesis of two‐dimensional (2D) silica nanostructures remains challenging. Here, mesoporous silica is synthesized at an interface between two immiscible solvents under conditions leading to the formation of 2D superstructures of silica cages, the thinnest mesoporous silica films synthesized to date. Orientational correlations between cage units increase with increasing layer number controlled via pH, while swelling with oil and mixed surfactants increase micelle size dispersity, leading to complex clathrate type structures in multilayer superstructures. The results suggest that a three‐dimensional (3D) crystallographic registry within cage‐like superstructures emerges as a result of the concerted 3D co‐assembly of the organic and inorganic components. Mesoporous 2D superstructures can be fabricated over macroscopic film dimensions and stacked on top of each other. The realization of previously inaccessible mesoporous silica heterostructures with separation or catalytic properties unachievable via conventional bulk syntheses is envisioned. MOE (Min. of Education, S’pore) Accepted version 2020-07-03T02:37:24Z 2020-07-03T02:37:24Z 2020 Journal Article Aubert, T., Ma, K., Tan, K. W., & Wiesner, U. (2020). Two-dimensional superstructures of silica cages. Advanced Materials, 32(21), 1908362-. doi:10.1002/adma.201908362 0935-9648 https://hdl.handle.net/10356/142824 10.1002/adma.201908362 32270557 2-s2.0-85083054207 21 32 en Advanced Materials This is the accepted version of the following article: Aubert, T., Ma, K., Tan, K. W., & Wiesner, U. (2020). Two-dimensional superstructures of silica cages. Advanced Materials, 32(21), 1908362-, which has been published in final form at https://doi.org/10.1002/adma.201908362. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy [https://authorservices.wiley.com/authorresources/Journal-Authors/licensing/self-archiving.html]. application/pdf |
| spellingShingle | Engineering::Materials 2D Materials Dual Structures Aubert, Tangi Ma, Kai Tan, Kwan Wee Wiesner, Ulrich Two-dimensional superstructures of silica cages |
| title | Two-dimensional superstructures of silica cages |
| title_full | Two-dimensional superstructures of silica cages |
| title_fullStr | Two-dimensional superstructures of silica cages |
| title_full_unstemmed | Two-dimensional superstructures of silica cages |
| title_short | Two-dimensional superstructures of silica cages |
| title_sort | two dimensional superstructures of silica cages |
| topic | Engineering::Materials 2D Materials Dual Structures |
| url | https://hdl.handle.net/10356/142824 |
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