Nanomaterials are materials that have structural features or components at the nanoscale, typically defined as having at least one dimension in the range of 1 to 100 nanometers (nm). This scale is significant because materials can exhibit unique physical and chemical properties at the nanoscale that differ from their bulk counterparts. Nanomaterials can be classified into various categories, including nanoparticles, nanocomposites, nanotubes, nanowires, and more, based on their shapes and compositions.