Alcohol
catalyst
Supercritical drying
Si alkoxide
h2o
Catalyst (Alcohol) f^ydrolysts"*
o <»
Xcrogcl (Xero: 'dry')
/ Sol
Adjust reaction
conditions to control Adjust viscosity to - --~ surface area. density. prepare films. Fibers. n/0
porosity. and porę size
and monoliths 9eot
Sol-gel process
Drying process