xerogels

Xerogels are porous, lightweight materials created by removing the liquid from a gel while maintaining its porous structure, usually through drying. They resemble sponges at a microscopic level, with countless tiny pores that trap air or other substances. These materials are used in insulation, drug delivery, and catalyst supports due to their high surface area and low density. Xerogels are valuable because they combine durability with excellent insulating properties, making them useful in various industrial and scientific applications.