The first chapter of Advances in Nanotechnology. Volume 22 discusses the three major types of nanocomposites: metal, polymer, and ceramic matrix. Characteristics of different types of nanocomposites and their potential applications are presented briefly as well. Following this, the authors examine the increasing use of engineered nanomaterials in consumer and industrial products that has aroused global concern regarding their fate in biological systems, resulting in a demand for parallel risk assessment. This compilation also contains numerous approaches for targeted drug delivery systems...