Following paper is awarded as the best paper of 2015 by Japanese society of Tribologists.

This is by isotope diamond of 12C and 13C.

“Friction modification by shifting of phonon energy dissipation in solid atoms”,

A.Kajita, M.Tohyama, H.Washizu, T.Ohmori, H.Watanabe and S.Shikata,

Tribology,10 (2015) pp.156-161