Highly porous thin films obtained by spray-gel technique

• Autores: Solís, José, Rodríguez, Juan, Estrada, Walter
• Formato: artículo
• Fecha de Publicación: 2004
• Institución: Instituto Peruano de Energía Nuclear
• Repositorio: IPEN-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.ipen.gob.pe:20.500.13054/383
• Enlace del recurso: https://hdl.handle.net/20.500.13054/383
• Nivel de acceso: acceso abierto
• Materia: Proceso de sol-gel; Pirolisis; Capas finas; Fotocatálisis; Baterías eléctricas; Óxidos de volframio; Difracción de rayos X

Combining the spray pyrolysis and the sol-gel techniques (spray-gel) gives the possibility to produce very rough and highly diffuse films, under appropriate conditions. This technique is suitable for producing multifunctional metal oxides for gas-sensing, electrochromism, microbattery, and photocatalysis applications; due to the fact that it yields a large interface between a solid and a gaseous/liquid medium. The process basically consists in producing an aerosol from a gel, which is sprayed over a hot substrate, where the film is going to grow. In this work we present the results on highly porous SnO2, WO3, and phosphotungstic acid (PWA) thin films obtained by spray-gel.