Nano-silica, or nanosilica, refers to tiny particles of silicon dioxide that are less than 100 nanometers in size. These particles have unique properties due to their small size and high surface area, making them useful in various applications, including construction materials, electronics, and cosmetics. They can enhance the strength and durability of materials while also improving their resistance to moisture and UV light. In addition to industrial uses, nano-silica is also explored in biomedical applications, such as drug delivery and imaging. Researchers are investigating its potential to improve the effectiveness of treatments and diagnostics. Overall, nano-silica is a versatile material with promising applications across multiple fields.