Holistic study on the influence of synthesis parameters on the properties of ordered mesoporous silica thin films deposited via electro-assisted self-assembly

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Haßebrock, Nina ; Kuhn, Meike ; Sedlmeir, Anna ; Timm, Jana ; Schenk, Anna ; Herzig, Eva M. ; Marschall, Roland:
Holistic study on the influence of synthesis parameters on the properties of ordered mesoporous silica thin films deposited via electro-assisted self-assembly.
In: Journal of Materials Chemistry A. (2026) .
ISSN 2050-7496
DOI: https://doi.org/10.1039/d6ta02803a

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Abstract

Mesoporous silica films with hexagonally ordered pores oriented vertically to the substrate find application in numerous fields. With the development of the electro-assisted self-assembly method, a straightforward way to synthesize such films has been introduced. However, varying film properties are needed for different applications. In this work, different synthesis parameters were studied influencing the film thickness, the aggregate formation, and most importantly the pore ordering. With the aim to deposit thick, aggregate-free films with highly ordered pores, applications such as membrane additives can be envisioned. Therefore, deposition time, deposition temperature, precursor concentration, and applied voltage were investigated, and were all found to have an impact on the resulting film thickness and the aggregate formation to different degrees. The applied voltage was also found to have a significant influence on the ordering of the mesopores. Thus, the systematic investigation of the influence of the different synthesis parameters on the mesoporous silica films, as provided in this work, facilitates the adjustment of the synthesis parameters for any desired application.