This book gathers research from across the globe in the study of the properties, synthesis and applications of diamonds. Topics discussed in this compilation include amperometric biosensors based on boron-doped diamond electrodes; optical properties of diamond like carbon thin films; dynamic friction polishing of diamond surfaces; boron-doped diamond as a versatile electrode material; diamond deposition process and its application to substrates and specific defects induced by molecular beam implantation into a diamond.