Raman spectrum study shows that the film has typical pikes of hydrogen free diamond like carbon film.

Vapour epitaxial grown single-crystal diamond film on diamond surface was obtained by microwave reinforced chemical vapour deposition method, using hydrogen, aceton vapour as source of gas.

There is more stupidity than hydrogen in the universe, and it has a longer shelf life — Frank Zappa, American composer, electric guitarist, record producer and film director.