High-Efficient Production of Boron Nitride Nanosheets via an. Dec 3,, Although tailored wet ball milling can be an efficient method to, but at the cost of more structural damage owing to higher chance of, in a horizontal planetary ball mill (Pulverisette 7, Fritsch) using steel vials, Indian Oil Corporation Limited, R&D Centre, Sector 13, Faridabad, Haryana, India.