Publication: Development of water-based silver nanoparticles conductive ink for inkjet-printed electrode
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Date
2024-02-01
Authors
Najwa, Ibrahim
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Abstract
The conventional methods employed in the production of silver nanoparticles (AgNPs) typically involve the use of hazardous chemicals and considerable energy usage. The growing demand for low-cost, environmentally friendly conductive inks in printed electronics has prompted the development of water-based AgNPs inks. This study aims to fabricate and evaluate AgNPs inks as electrodes for heavy metal detection. Colloidal AgNPs ink was prepared via a chemical reduction method. The first part of the study covers investigation on the influence of silver nitrate (AgNO3) concentration at varied temperatures and the impact of polyvinylpyrrolidone (PVP) surfactant concentration on ink properties. Comparison on the electrical performance and morphology of conventional chemical reduction and an in-situ synthesis methods was conducted. Various paper substrates (photo paper, A4 paper, filter paper, and nitrocellulose) were analyzed for their suitability with AgNPs conductive inks for electrochemical performance in electrode fabrication. Among these, photo paper exhibited superior conductivity (2.9 x100 S/m) and favorable adherence with AgNPs. Electrochemical performance was assessed using cyclic voltammetry (CV) measurements and square wave anodic stripping voltammetry (SWASV) analysis for lead (Pb(II)) and cadmium (Cd(II)) detection. The AgNPs/photo paper electrode with five printing layers and sintering at 75°C for 120 minutes demonstrated excellent performance with a detection range of 100-1000 ppb and detection limits of 167.79 ppb (Pb(II)) and 123.34 ppb (Cd(II)). The findings highlight the potential of AgNPs/photo paper electrodes as simple, fully printed working electrodes for Pb(II) and Cd(II) ions detecting, offering promising applications in heavy metal detection.