The properties of Smart materials make them respond to changes in their condition. This implies one of their properties can be changed by an external condition, for example, temperature, light, pressure or power. This change is reversible and can be repeated commonly. There are an extensive variety of smart materials. Each offer distinctive properties that can be changed.
Metamaterials are manufactured substances and macroscopic composites having a synthetic, three-dimensional, intermittent cellular architecture intended to deliver an optimized combination, not accessible in nature, of at least two reactions to particular excitation. Researchers have already utilized metamaterials to make a cloaking device that works with microwaves. Different applications for metamaterials incorporate super lenses, cutting edge handheld electronic devices, advanced generation of solar energy, smart window materials.