“…However, suitable additives are needed to enhance the certain properties of liquid lubricants such as the wear resistance, oxidation resistance, and anti-corrosion [ 69 ]. Many additives such as carbon-based particles [ 70 , 71 , 72 , 73 ], metal composite nanoparticles [ 74 , 75 ], metal oxides [ 76 , 77 ], and MoS 2 [ 78 , 79 ] have been studied during the last few decades. Nonetheless, in turn, the uneven distribution and aggregation of the additives will reduce the lubricating properties of liquid lubricants.…”