Aerogel monoliths are treated with silanes or transition metal-containing reagents by chemical vapor deposition. This treatment improves the mechanical strength of the aerogel while maintaining their high surface area, low density, and porosity. When silane containing reagents are used, the transparency is generally maintained.
STATEMENT REGARDING FEDERAL RIGHTS
 This invention was made with government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy. The government has certain rights in the invention.