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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Spontaneously formed porous and composite materials
TL;DR: In this paper, a number of methods for the creation of porous materials are described, including shape-conserving routes that lead to hierarchical macro/mesoporous architectures, where the resulting mesopores are aligned locally with certain crystallographic directions.
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Fabrication of Mesoporous Silica Microtubules through the Self-Assembly Behavior of β-Cyclodextrin and Triton X-100 in Aqueous Solution
TL;DR: In this article, mesoporous silica microtubules were hydrothermally prepared with tetraethoxysilane (TEOS) as silica source and the supramolecular assembly of β-cyclodextrin and the nonionic surfactant Triton X-100 (TX-100) as the structure-directing agent.
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Spontaneous Formation of Inorganic Helical Fibers and Rings
Oscar Giraldo,Manuel Marquez,Stephanie L. Brock,Steven L. Suib,Hugh W. Hillhouse,Michael Tsapatsis +5 more
TL;DR: In this article, the formation process of these helices is related to contraction of the gel during heating with capillary pressure until solvent is removed followed by expansion of the helix.
Journal ArticleDOI
Hierarchically porous silica monoliths with tuneable morphology, porosity, and mechanical stability
TL;DR: In this article, a modified Stober method was used as a building block to obtain hierarchically porous structures with meso-/micro-pores and macropores by a controlled freezing approach and the macropore morphologies could be tuned with the addition of surfactants in the silica colloidal suspensions during the freezing process.
Journal ArticleDOI
Ferromagnetic properties of epitaxial manganite films on SrTiO3∕Si heterostructures
Aswini K. Pradhan,J.B. Dadson,D. Hunter,Kai Zhang,Soumya R. Mohanty,E. M. Jackson,B. Lasley-Hunter,K. Lord,T. M. Williams,R. R. Rakhimov,Jun Zhang,David J. Sellmyer,K. Inaba,T. Hasegawa,S. Mathews,Boby Joseph,B.R. Sekhar,Utpal N. Roy,Yonggang Cui,Arnold Burger +19 more
TL;DR: In this article, the magnetic properties of epitaxial La0.7Ba0.3MnO3 and La 0.7Sr0.1MnNO3 films on Si (100) and Si (111) substrates using SrTiO3 template layer were reported.
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.