Photochemical functionalization of diamond films using a short carbon chain acid

- A short carbon acid, acrylic acid, was used to modify H-terminated diamond film via photochemical approach.
- After ultraviolent (UV) illumination, oxygen related radical groups such as carbonyl (CO) and carboxyl (COOH) groups were observed on the diamond surface by means of XPS and FTIR spectroscopy, proving a successful functionalization route of diamond.
- It shows a hydrophilic surface of diamond films after modification for the biosensing applications.