Hierarchically ordered oxides
Peidong Yang,Tao Deng,Dongyuan Zhao,Pingyun Feng,David J. Pine,Bradley F. Chmelka,George M. Whitesides,Galen D. Stucky +7 more
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TLDR
Porous silica, niobia, and titania with three-dimensional structures patterned over multiple length scales were prepared by combining micromolding, polystyrene sphere templating, and cooperative assembly of inorganic sol-gel species with amphiphilic triblock copolymers.Abstract:
Porous silica, niobia, and titania with three-dimensional structures patterned over multiple length scales were prepared by combining micromolding, polystyrene sphere templating, and cooperative assembly of inorganic sol-gel species with amphiphilic triblock copolymers. The resulting materials show hierarchical ordering over several discrete and tunable length scales ranging from 10 nanometers to several micrometers. The respective ordered structures can be independently modified by choosing different mold patterns, latex spheres, and block copolymers. The examples presented demonstrate the compositional and structural diversities that are possible with this simple approach.read more
Citations
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Ink Jet Printing of Microdot Arrays of Mesostructured Silica
M. Mougenot,Martine Lejeune,Jean-François Baumard,Cédric Boissière,François Ribot,David Grosso,Carmen Navarro Sanchez,Rémi Noguera +7 more
TL;DR: In this article, a process for preparing microdot arrays of SiO 2 from a tetraethoxysilane precursor containing either a cationic (CTAB) or non-ionic surfactant was described.
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Direct Formation of Hydrophobic Silica-based Micro/mesoporous Hybrids from Polymethylhydrosiloxane and Tetraethoxysilane
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Hierarchically porous titania thin film prepared by controlled phase separation and surfactant templating
TL;DR: TEM and SEM imaging confirm that calcined titania thin films have interconnected hierarchical porous structures consisting of ordered mesopores 4-12 nm in diameter and macroporous voids >100 nm in size.
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Laponite and hybrid surfactant/laponite particles processed as spheres by spray-drying
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References
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Dongyuan Zhao,Jianglin Feng,Qisheng Huo,Nicholas A. Melosh,Glenn H. Fredrickson,Bradley F. Chmelka,Galen D. Stucky +6 more
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Synthesis of Macroporous Minerals with Highly Ordered Three-Dimensional Arrays of Spheroidal Voids
TL;DR: The examples presented demonstrate the compositional diversity possible with this technique and could have applications in areas ranging from quantum electronics to photocatalysis to battery materials.