“…With continuous research on controlled releasing-type antibacterial coatings assisted by nanotechnology and combining different preparation techniques (e.g., plasma electrolytic oxidation [ 236 ], electrophoresis [ 237 ], and LbL [ 238 ]) [ 239 , 240 ], multiple nano drug carriers have been developed. By virtue of the ability to enhance drug solubility, modulate drug release, and achieve targeted delivery of multiple drugs, in combination with the advantages of nanoparticles themselves such as small size and large specific surface area, these carriers (mainly including nanotubes, polymer nanocarriers, liposomes, and carbon-based nanocarriers) have become promising antibacterial drug carriers [ 241 , 242 ].…”