Abstract
AbstractIn this work, gold nanoparticles (Au NPs)/indium‐zinc‐oxide (IZO) nanocomposite visible photodetector (PD) is directly prepared by near‐infrared (NIR) laser‐annealing on a 3D‐printed substrate to form an integrated colorimetric sensor. After a surface planarization process, using a low power laser treatment without damaging the substrate, Au NPs are formed from the Au thin layer (6 nm) on 3D‐printed resin substrate by laser‐assisted dewetting process. Also, the UV–vis photoresponsivity is compared by tuning different NIR laser power intensity for sol‐gel IZO curing. By investigating the temperature profile of each laser annealing process and the surface morphology of Au NPs/IZO nanocomposite film, the optimized PD is then integrated with a 3D‐printed sensing chamber for successfully demonstrating urea detection varied from 1, 5, 10, 25 and 50 × 10−3 m, which refer to the salivary urea concentrations for healthy and chronic kidney disease groups.
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