Cover Picture: Fabrication of Stable Low-Density Silica Aerogels Containing Luminescent ZnS Capped CdSe Quantum Dots (Adv. Mater. 15/2006)



Luminescent CdSe quantum dots 2.5 and 6.0 nm in diameter can be incorporated into low-density silica aerogel matrices. In work reported by Stiegmann and co-workers on p. 1965, aerogels are formed from the supercritical CO2 extraction of an alcogel containing quantum dots surface passivated with 3-aminopropyltriethoxysilane. The resulting aerogels, shown on the cover, are low scattering and display intense, stable luminescence.