What is Nano-Sensor

Metamaterials are novel artificial materials with periodic arrangement of structural meta-atoms which exhibit unique properties. Field localization and enhancement at the surface of the meta-atoms allow the structure to be an effective tool for sensing applications. This chapter discusses the emerging field of nanostructured electromagnetic metamaterials in sensing applications. The first section introduces nanostructured metamaterials based on their structures, properties, and fabrication techniques. The following section encompasses the applications of metamaterial-based nano-sensors in medicine and food science. For biomedical sensing, the applications of metamaterial-based nano biosensors in medical field are highlighted. For food science sensing, the applications of nano metamaterials in food contamination detection and food quality control are discussed. The last section discusses the future trends of nanostructured metamaterials in shifting towards reconfigurable, controllable, and multi-functional meta-devices.