FACILE SYNTHESIS OF FLUORESCENT CARBON NANODOTS FROM SOURSOP PEEL AS A CARBON SOURCE FOR FERRIC METAL ION SENSOR Journal title: Engineering and Technology Journal Authors: Zakarias Seba Ngara , Avelina Elin , Frederika Rambu Ngana , Minsyharil Bukit, Reinner Ishaq Le... Subject(s): Engineering, Technology