Book excerpt: Phytonanotechnology: Challenges and Prospects consolidates information on the use of phytonanoparticles for biomedical, environmental and agricultural applications, covering recent advances in experimental and theoretical studies on various properties of nanoparticles derived from plant sources. The book deals with various attributes of phytonanoparticles, discussing their current and potential applications. In addition, it explores the development of phytonanoparticles, synthesis techniques, characterization techniques, environmental remediation applications, anti-microbial properties, miscellaneous applications, and multi-functional applications. Risks associated with nanoparticles are also discussed. This book is an important reference for materials scientists, engineers, environmental scientists, food scientists and biomedical scientists who want to learn more about the applications of nanoparticles derived from plant sources. - Explores synthesis methods of phytonanoparticles from a variety of plant groups - Discusses the major biological reactions of phytonanoparticles - Outlines the major opportunities and challenges of using phytonanoparticles in biomedical, environmental and agricultural applications