3D GNS와 3D DA-GNS의 표면에 0.5초의 간격으로 증류수 방울을 떨어뜨리고 접촉각을 측정하였다.
Drops of distilled water were dropped on the surfaces of 3D GNS and 3D DA-GNS at intervals of 0.5 seconds, and the contact angle was measured.