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Title: Two-dimensional superstructures of silica cages
Authors: Aubert, Tangi
Ma, Kai
Tan, Kwan Wee
Wiesner, Ulrich
Keywords: Engineering::Materials
Issue Date: 2020
Source: 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
Journal: Advanced Materials
Abstract: 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.
ISSN: 0935-9648
DOI: 10.1002/adma.201908362
Rights: 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 This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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