**Definition:**  

Fullerene C70 is a carbon-based molecule composed of 70 carbon atoms arranged in a unique spherical structure, resembling a rugby ball. It belongs to the fullerene family, known for their exceptional stability and unique properties.  

**Functions:**  

1. **Electron Acceptor:** Exhibits excellent electron-accepting capabilities, making it valuable in electronic and photovoltaic applications.  

2. **Antioxidant Properties:** Acts as a potent free radical scavenger, protecting cells and materials from oxidative damage.  

3. **High Stability:** Demonstrates remarkable thermal and chemical stability, suitable for demanding industrial environments.  

**Applications:**  

1. **Electronics:** Used in organic solar cells, transistors, and semiconductors for enhanced performance.  

2. **Cosmetics:** Incorporated into anti-aging skincare products for its antioxidant effects.  

3. **Biomedical Research:** Explored for drug delivery systems and cancer therapy due to its unique structure and properties.  

4. **Materials Science:** Applied in the development of advanced lubricants, coatings, and composites.