Synthesis of silica aerogels and their application as drug delivery system.

Cellulose aerogels: Highly porous, ultra-lightweight materials

“…They usually exhibit a very large specific surface of 600-1600 m 2 g -1 , an extremely low thermal conductivity and have a good strength and dimensional stability. Even though aerogels are still being produced mainly from silica, they can also be derived from metal oxides, carbon or special synthetic polymers (Brinker and Sherer 1990;Smirnova 2002). Microscopically, aerogels are built of small particles, with diameters in the single-digit nanometer range.…”

Vacuum insulation panels for building applications: A review and beyond

“…The high porosity makes aerogels the lightest solid material know at present: However it has a skeleton density of $2200 kg/m 3 , the high porosity results in a bulk density up to as low as 3 kg/m 3 whereas, e.g. the density of air is 1 kg/m 3 [83][84][85].…”

“…A heating-treatment of the aerogels can increase their transparency furthermore with $6% to a value of 76% [102] due to water desorption and burning of organic components. Furthermore, the optical properties can be influenced by parameters of the sol-gel process by selecting optimal synthesis parameters [83,87].…”

Linear and nonlinear optical properties of trans- and cis-poly(1-ethynylpyrene) based sonogel hybrid materials

“…Novel methodologies have been recently developed for the fabrication of amorphous SiO 2 with large surface areas, such as the xero-gel and aerogel-route, where surface areas up to 1000 and 2000 m 2 g K1 have been reported, respectively. Last kind of composites are, nevertheless, very difficult to synthesize [36,37]. Beside their adequate porosity, our samples showed high stability from 20 to 600 8C.…”