In the past two decades, the field of nanoporous materials has undergone accelerated developments. As these materials possess high specific surface areas, well-defined pore sizes, and functional sites, they show a great diversity of applications such as molecular adsorption/storage and separation, sensing, catalysis, energy storage/conversion, drug delivery, and more. This book surveys the key developments in the synthesis of nanoporous materials in a broad range from soft porous materials-such as porous organic and metal-organic frameworks-to hard porous materials, such as porous metals and metal oxides, and the important advances in their applications to date.