Preparation of size controlled nanometric spheres of colloidal silica for synthetic opal manufacture

C. A.Cortés Escobedo, J. Muñoz-Saldaña, D. Jaramillo Vigueras, F. J.Espinoza Beltrán

Producción científica: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

5 Citas (Scopus)

Resumen

In this work, we present a modification of the sol-gel based, Stöber, Fink and Bohn's (SBF) procedure for the preparation of nanometric spheres of silica with a monomodal distribution of size and controlled diameter. In the SBF method, tetraethyl orthosilicate (TEOS) is used as a precursor molecule and hydrolysis and condensation reactions to form chains and branches of Si-O bonds are carried out. The novelty of this work consists in the use of an aqueous ammonium hydroxide solution as ammonia source. Graphics of particle size as a function of reagent contents are presented (reaction yield control) and differences to the results from the original SBF method are discussed. This procedure is the very first step for the development of a sol-gel synthetic opals preparation process. As a result, the best route to prepare monodisperse spheres in the whole range of 250 to 850 nm is that of keeping constant the TEOS and NH3 contents at 0.28:1M varying water contents in the range of 8-12.5 M.

Idioma originalInglés
Título de la publicación alojadaAdvanced Structural Materials II - Proceedings of the Advanced Structural Materials Symposium of the Annual Congress of the Mexican Academy of Materials Science
EditorialTrans Tech Publications Ltd
Páginas187-192
Número de páginas6
ISBN (versión impresa)0878499938, 9780878499939
DOI
EstadoPublicada - 2006
Publicado de forma externa
EventoAdvanced Structural Materials Symposium of the Annual Congress of the Mexican Academy of Materials Science, 2004 - Cancun, Quintana Roo, México
Duración: 22 ago. 200426 ago. 2004

Serie de la publicación

NombreMaterials Science Forum
Volumen509
ISSN (versión impresa)0255-5476
ISSN (versión digital)1662-9752

Conferencia

ConferenciaAdvanced Structural Materials Symposium of the Annual Congress of the Mexican Academy of Materials Science, 2004
País/TerritorioMéxico
CiudadCancun, Quintana Roo
Período22/08/0426/08/04

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