Proceedings of the
9th International Conference of Nanomanufacturing (nanoMan2024)
December 1 – 4, 2024, Singapore
Scalable and Cost-Effective Nanowire Fabrication Using Ultrafast Laser with Optical 4f Laser Energy Modulation
1Engineering Research Center of Mechanical Testing Technology and Equipment, Ministry of Education, Chongqing University of Technology, Chongqing, China.
2Chongqing Key Laboratory of Time-grating Sensing and Advanced Testing Technology, Chongqing University of Technology, Chongqing, China
ABSTRACT
Nanowires have always been a research hotspot due to their unique electrochemical, optical, and mechanical properties, particularly in their application as negative electrode materials for lithium-ion batteries. The traditional laser ablation method for preparing nanowires involves gas-phase growth by heating the target material to form high-temperature concentrated steam, which results in complex equipment and high costs. In light of this, this paper proposes a novel nanowire processing method by the use of an ultrafast laser with an optical 4f system for laser energy distribution modulation to directly process nanowires on the target material. A mathematical model is built to investigate the forming mechanism of single-pulse ablative surface profiles based on which the ablation model of nanowires has been established. Theoretical analysis and computer simulation have indicated that the proposed method might be a simple and cost-effective approach for large-scale, low-cost preparation of nanowires.
Keywords: Nanowires, Ultrafast laser processing, Optical 4f system, Laser energy modulation.
