Structural Characterization of Mesoporous Thin Film Architectures: A Tutorial Overview
| Autor: | Alaric Taylor, Stefan Guldin, Barry Reid, Maximiliano J Fornerod, Alberto Alvarez-Fernandez, Giorgio Divitini |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanotechnology 02 engineering and technology Porosimetry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Characterization (materials science) Percolation Grazing-incidence small-angle scattering Surface modification General Materials Science Thin film 0210 nano-technology Porosity Mesoporous material |
| Zdroj: | ACS Applied Materials & Interfaces. 12:5195-5208 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.9b17899 |
| Popis: | Mesoporous thin film architectures are an important class of materials that exhibit unique properties, which include high surface area, versatile surface functionalization, and bicontinuous percolation paths through a broad library of pore arrangements on the 10 nm length scale. Although porosimetry of bulk materials via sorption techniques is common practice, the characterization of thin mesoporous films with small sample volumes remains a challenge. A range of techniques are geared toward providing information over pore morphology, pore size distribution, surface area and overall porosity, but none of them offers a holistic evaluation and results are at times inconsistent. In this work, we present a tutorial overview for the reliable structural characterization of mesoporous films. Three model samples with variable pore size and porosity prepared by block copolymer (BCP) coassembly serve for a rational comparison. Various techniques are assessed side-by-side, including scanning electron microscopy (SEM), atomic force microscopy (AFM), grazing incidence small-angle X-ray scattering (GISAXS), and ellipsometric porosimetry (EP). We critically discuss advantages and limitations of each technique and provide guidelines for reliable implementation. |
| Databáze: | OpenAIRE |
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