Abstract
Silica aerogel is a low-density material with a loose porous structure. The structure revealed by early TEM studies was found to be composed of fibrous chains of globular particles. Iler showed that measurements of the specific surface area obtained by the Brunauer-Emmett-Teller (BET) technique correlated reasonably well with calculations based on the surface area of spheres with the average diameter of the globular particles revealed by TEM. The structure of aerogel also is conducive to calculations of specific surface area based on data generated by small-angle x-ray scattering (SAXS) using synchrotron radiation, and the SAXS data correlates well with the BET measurements. Since the delicate structure of silica aerogel is highly susceptible to beam damage in the TEM, the agreement of surface-area estimates based on TEM particle-size measurements with the SAXS and BET data provides important support for the significance of the TEM results.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Proceedings, annual meeting, Electron Microscopy Society of America
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
