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Titolo:
Sphere templating methods for periodic porous solids
Autore:
Stein, A;
Indirizzi:
Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA Univ Minnesota Minneapolis MN USA 55455 t Chem, Minneapolis, MN 55455 USA
Titolo Testata:
MICROPOROUS AND MESOPOROUS MATERIALS
, volume: 44, anno: 2001,
pagine: 227 - 239
SICI:
1387-1811(200106)44:<227:STMFPP>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTONIC BAND-GAP; ORDERED MACROPOROUS MATERIALS; COLLOIDAL CRYSTALS; OPTICAL-PROPERTIES; 3-DIMENSIONAL ARRAYS; NATURAL LITHOGRAPHY; MESOPOROUS SILICA; LIGHT-SCATTERING; COMPOSITE FILMS; VISIBLE-LIGHT;
Keywords:
macroporous; colloidal crystal; templating; metal oxides; metals;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
121
Recensione:
Indirizzi per estratti:
Indirizzo: Stein, A Univ Minnesota, Dept Chem, 207 Pleasant St SE, Minneapolis, MN 55455 USA Univ Minnesota 207 Pleasant St SE Minneapolis MN USA 55455 55 USA
Citazione:
A. Stein, "Sphere templating methods for periodic porous solids", MICROP M M, 44, 2001, pp. 227-239

Abstract

This paper reviews methods that employ colloidal crystals, composed of monodisperse silica or polymer spheres. to template periodic porous solids. The resulting structures can be regarded as inverse replicas of the template array, or inverse opals. A large number of compositions have been prepared by various modifications of a colloidal crystal templating process. including silicates and organosilicates, metal oxides, metals, metal chalcogenidesand carbon allotropes. Regardless of the product composition, the methods involve several common steps. In a first step. colloidal crystals are formed by packing uniform spheres into three-dimensional or sometimes two-dimensional arrays. In a second step, the interstitial space is filled by a fluidthat is subsequently converted into a solid skeleton. In a final step, thespheres are removed, creating a solid skeleton in the location of the former interstitial spaces and interconnected voids where the spheres were originally located. Each of these steps, together with appropriate synthesis conditions (or literature references) are outlined for diverse compositions. Potential applications of the macroporous solids include photonic crystals,catalysts, supports, sensors, and porous electrodes or electrolytes. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 01:33:08