Nanotechnology and biosensors show how nanotechnology is used to create affordable, mass-produced, portable, small-sized nanosensors to directly monitor food toxicants and environmental pollutants. In addition, it provides the market with systems for applications in food analysis, environmental monitoring and health diagnostics. Nanotechnology has led to a dramatic improvement in the performance, sensitivity and selectivity of biosensor devices. Metal-oxides and carbon nanostructures, gold and magnetite nanoparticles, and the integration of dendrimers in biosensors using nanotechnology, have contributed greatly to making nanosensors more effective and affordable in the market. This book provides a timely resource on the subject.