Cluster-enabled patterning of copper nanostructures from aqueous solution using a femtosecond laser. (26th September 2022)

• Record Type: Journal Article
• Authors: Luo, Zhijun; Zeng, Zhihao; Liu, Ziyu; Wang, Duan; Gan, Zongsong; Xie, Changsheng
• Is Part Of: Nanotechnology. Volume 33:Number 50(2022)
• Publication Date: 2022-09-26
• Subjects: direct laser writing -- two photon absorption -- copper clusters -- common metal; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ac8c4a
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: A one-step method for patterning low-resistivity nanoscale copper wire is proposed herein to solve the challenging issues of using common metals rather than noble metal nanostructures fabricated by direct laser writing in solution. A complexing and a reducing agent were introduced for the single-photon absorption of copper solution in the visible range and to enable two-photon absorption with a femtosecond laser. Copper clusters were generated prior to direct laser writing to decrease induced laser energy during two-photon absorption and accelerate copper nanowire patterning to avoid the boiling of copper solution. A surfactant was used to restrain the overgrowth of copper clusters to obtain written nanowires with high uniformity. By controlling the laser writing parameters, the obtained copper wire had a minimum width of 230 nm and a resistivity of 1.22 × 10 −5 Ω·m. Our method paves the way for the fabrication of common metal nanodevices by direct laser writing.