Skip to main content

Mesopore uniformity and hydrothermal stability of silica thin films for high permeabilty applications


EMSL Project ID
11695

Abstract

Thin film OMSs were prepared using several organic templates that provide a range of ordering in the films. Results indicate that ordered mesoporous domains within the film promote uniformly thicker pore walls that increase hydrothermal stability by reducing the number of ?weakest links,? while the orientational disorder of those domains simultaneously promotes the high permeabilities needed for thin film sensor applications. A quantitative mechanical model is used to describe the dependence of the mechanical stability on the pore size and wall thickness, and its relationship to hydrothermal stability is discussed.

Project Details

Project type
Exploratory Research
Start Date
2004-10-28
End Date
2006-04-18
Status
Closed

Team

Principal Investigator

Rick Williford
Institution
Pacific Northwest National Laboratory

Related Publications

Williford RE, XS Li, RS Addleman, GE Fryxell, S Baskaran, JC Birnbaum, CA Coyle, TS Zemanian, CM Wang, and AR Courtney. 2005. "Mechanical Stability of Templated Mesoporous Silica Thin Films." Microporous and Mesoporous Materials 85(3):260-266.