In situ preparation of nano cone-like structures of rutile titanium oxides on titanium implants by one-step femtosecond laser irradiation for enhanced mechanical properties and biocompatibility

Titanium oxides (TiO2) nanostructures coating is helpful in improving the utilization of titanium in many areas due to its multifunctional properties. This study introduces a novel approach for the in-situ fabrication of nano cones-like structures of rutile titanium oxides (NCS–TiO2) on the surface of titanium utilizing femtosecond laser technology. Rutile titanium oxides were synthesized with a height of around 80 nm and a diameter of 100 nm, forming NCS that imparts higher hardness, wear resistance, and biocompatibility. Molecular dynamic simulation provides valuable insights into the three-stage formation process of NCS-TiO2. Molecular dynamic simulation revealed that the growth of rutile titanium oxides and the formation of nano cones-like structures are attributed to the interplay between femtosecond laser ablation and the accumulation of thermal energy. The proposed method offers a versatile and straightforward approach for creating functional surfaces on metal substrates, enabling broad applicability and ease of implementation, specifically in titanium and its alloys. This advancement holds great potential for expanding the scope of titanium-based materials and their applications, paving the way for improved mechanical properties and biocompatibility in diverse fields.