Copper electrode preparation by a selective laser reduction of copper oxide on lignin fiber membranes and its application as a photodetector

Abstract

The performance of electrodes is a key factor affecting the development of smart fabrics. The preparation of common fabric flexible electrodes has defects such as high cost, complicated preparation, and complex patterning that limit the development of fabric-based metal electrodes. Therefore, this paper presented a simple fabrication method for preparing Cu electrodes using selective laser reduction of CuO nanoparticles. By optimizing laser processing power, scanning speed, and focusing degree), we prepared a Cu circuit with an electrical resistivity of ∼ 5.53 µΩ.m. Based on the photothermoelectric properties of Cu electrodes, a white light photodetector is developed. The detectivity of the photodetector reaches ∼2.14 mA/W at a power density of 10.01 mW/cm2. This method is instructive for preparing metal electrodes or conductive lines on the surface of fabrics, and provides specific techniques for manufacturing wearable photodetectors.

Direct Writing of Semiconducting and Conducting Microstructures by Using Selective Laser Sintering and Reduction of CuO Nanoparticles

“…Copper (Cu) is more suitable for fabrication of metallic micro/nanostructures due to its low cost but similar electrical and thermal conductivity and catalytic property compared with gold and silver. In recent years, Cu micro/nanostructures have been widely used and shown excellent performance in integrated circuits, flexible sensors, , microheaters, and photodetectors. , Because the fabrication of Cu micro/nanostructures by using lithography plus evaporation or etching is complex and expensive, several kinds of direct writing methods, including inkjet printing, ,, electrochemical printing, and laser direct writing − have been reported for the fabrication of Cu micro/nanostructures. Compared with other methods, laser direct writing is more flexible and accurate.…”

Efficient Composite Colorization of Copper by Spatially Controlled Oxidation with Deep‐UV Ultrafast Lasers

“…[36][37][38][39] Laser processing of surfaces can be performed easily on flexible and 3D objects and requires no additional components whatsoever. [40,41] However, the work conducted so far with infrared laser photooxidation sometimes presents several undesirable side-effects, like the fabrication of laser induced periodic surface structures (LIPSS) that inevitably produce a strong angle-dependency of the coloring of the surface via diffraction. [31,42] In this paper, we address these limitations by performing efficient photo-oxidation with a femtosecond laser in the DUV range at 257 nm.…”