Effect of substrate bias in amorphous carbon films having embedded nanocrystallites

► a-C films having embedded nanocrystallites were deposited by FCJCA technique. ► Effect of negative substrate bias on properties of the deposited films has been studied. ► The properties of the deposited samples have been compared with ta-C films. ► a-C films having embedded nanocrystallites may act as better hard coating materials.