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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Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications
Xiaobo Chen,Samuel S. Mao +1 more
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On the Controllable Soft-Templating Approach to Mesoporous Silicates
Ying Wan,Dongyuan Zhao +1 more
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New approaches to nanofabrication: molding, printing, and other techniques.
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Chemical strategies to design textured materials: from microporous and mesoporous oxides to nanonetworks and hierarchical structures.
Abstract: 3.
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Characterization of the Porous Structure of SBA-15
TL;DR: In this paper, Zhao et al. used powder X-ray diffraction (XRD), thermogravimetric analysis (TGA), and nitrogen adsorption to characterize SBA-15 ordered mesoporous silicas.
References
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A Velociraptor wishbone
TL;DR: The discovery of a furcula is reported in Dromaeosauridae, a group posited to be the closest relative of birds, and the uncertainty of whether this absence is real or an artefact of preservation obscures the evolutionary history of this structure.