2024/05/15 by J. M. Adams, Daniel Heligman, Adams, Jordan M. +6
Engineering · #FOS: Physical sciences #Laser-Ablation Synthesis of Nanoparticles #Materials Science (cond-mat.mtrl-sci) #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.2405.09340
openalex publication_date 2024/05/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We show that direct laser writing in aqueous silver nitrate with a λ = 1030 nm femtosecond laser results in deposition of a mixture of silver oxide and silver, in contrast to the pure silver deposition previously reported with 780 nm femtosecond direct laser writing. However, adding photoinitiator prevents silver oxide formation in a concentration-dependent manner. As a result, the resistivity of the material can also be controlled by photoinitiator concentration with resistivity being reduced from approximately 9e-3 Ωm to 3e-7 Ωm. Silver oxide peaks dominate the X-ray diffraction spectra when no photoinitiator is present, while the peaks disappear with photoinitiator concentrations above 0.05 wt%. A THz polarizer and metamaterial are printed as a demonstration of silver oxide printing.