Nanodiamond is widely used in advanced industrial and biomedical applications due to its unique combination of hardness, biocompatibility, and surface functionality. In industrial settings, it serves as a high-performance lubricant additive, reducing friction and wear in mechanical systems. It is also employed in precision polishing compounds for optics, semiconductors, and hard disk surfaces, providing ultra-smooth finishes. Additionally, it is used in durable coatings to enhance scratch resistance.

In the biomedical field, nanodiamond is used as a carrier for drug delivery, especially in targeted cancer therapies, where it can bind therapeutic agents and release them in a controlled manner. Its surface allows easy functionalization with proteins, antibodies, or imaging agents, making it valuable in diagnostics and bioimaging. Nanodiamonds are also explored in tissue engineering and regenerative medicine due to their low toxicity and ability to support cell growth.

Additionally, nanodiamonds are being investigated for use in quantum sensing and electronic devices, thanks to their stable fluorescent properties and potential as components in next-generation sensors and computing systems.

In cosmetics, nanodiamonds are incorporated into skincare products to exfoliate dead skin cells and stimulate skin renewal, leading to brighter and smoother skin.