Femtosecond laser-induced non-thermal welding for a single Cu nanowire glucose sensor

• DOI: 10.1039/c9na00740g
• Publication Date: 2020-01-23T02:23:32Z
• Authors: Yongchao Yu; Yangbao Deng; Md Abdullah Al Hasan; Yanfeng Bai; Ruo-Zhou Li; Shuguang Deng; Pooran Joshi; Seungha Shin; Anming Hu
• Keywords: Chemistry; 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Copper nanowires (CuNWs) are a key building block to facilitate carrier conduction across broad range of nanodevices. For integration into nanoscale devices, manipulation and welding these need be overcome. Based on high energy density laser processing investigation, we report innovative single CuNWs silver film using tightly focused beam combined with through the dielectrophoresis (DEP) method. Two types lasers, femtosecond (FS) continuous-wave (CW), were employed analyze, improve, control Cu-NW melting characteristics under irradiation. The FS resulted in metallic joint low contact resistance suitable for functional electronic Computational simulations 1-D heat diffusion equation finite difference method (FDM) performed gain an insight metal-laser interactions performance welded development. Simulation studies lasers established contrasting behavior metal device feasibility CuNW based contacts was evaluated terms electrical glucose sensor. It possible sense concentration down 10-6 M, demonstrating path towards wearable, flexible nanoelectronic devices.