AEROGEL COMPOSITES USING CHEMICAL-VAPOR INFILTRATION

A new method to produce novel composite materials based on the use of aerogels as a starting material is described. Using chemical vapor inf iltration, a variety of solid materials were thermally deposited into the open pore structure of aerogel. The resulting materials possess ne w and unusual properties including photoluminescence, magnetism and al tered optical properties. An important characteristic of this preparat ion process is the very small size of the deposits that gives rise to new behaviors. Silicon deposits exhibit photoluminescence, indicating quantum confinement. Two or more phases may be deposited simultaneousl y and one or both chemically or thermally reacted to produce new struc tures.