Preparing and Applying Silver Nanoparticles in Conductive Ink and Inkjet Painting

Abstract

Noble metal nanoparticles have special properties in optical, electronic, and physical chemistry due to their high surface area and volume. With the development of electronic printing technology, inkjet printing has gradually replaced traditional spin coating and blade coating, since it leads to more material savings and a faster batch production, and the pattern can be easily designed by a computer. In this study, Ag nanoparticles were prepared by a chemical reduction method. Non-toxic, environment-friendly agents were selected to fabricate a single-shape, uniform-size, crystal-form, and monodisperse product. The effects of the reducing agent ratio and the stabilizer ratio on the size, shape, and stability of the nanoparticles are discussed. The silver nanoparticles were characterized by an ultraviolet-visible spectrophotometer (UV-vis) and a transmission electron microscope (TEM). In addition, in order to prepare conductive ink that can stably disperse for a long time and that can be applied to inkjet printing on a PET flexible substrate at a lower sintering temperature, a sintering agent and a commercial surfactant were added. The experimental results show that the best addition ratio of the precursor to the reducing agent and the stabilizer is 1:6:1. The conductive silver ink was printed and treated by a70 mM NaCl solution, and the electric resistivity was 5.17×10−4 Ω· cm.

Facile Synthesis of Silver Nanoparticles and Preparation of Conductive Ink

“…03-065-2871, the analysis results indicate the crystalline structure of silver. In our past research, we have experimentally explored the effects of the reducing agent and stabilizer on nanoparticle generation [ 27 ]. When the stabilizer was added at the precursor:reducing agent:stabilizer molar ratio of 1:6:1, the Ag nanoparticles exhibited satisfactory dispersibility, and the stabilizer was confirmed to increase the thickness of the surface functional base layers of the nanoparticles, thus enabling their individual dispersion.…”

“…Hence, propylene glycol and deionized water were selected as the solvents for the conductive ink. In our past research, the amount of Ag nanoparticles added to the ink was fixed at 30 wt%, and a volume ratio of 41:59 between propylene glycol and water was determined to be the optimal solvent ratio [ 27 ]. The viscosity and surface tension of the conductive ink are 3.19 mPa s and 0.71 mN m −1 , respectively.…”

“…In our past research [ 27 ], effects of the reducing agent and stabilizer on nanoparticle generation had been studied, and we had tested the properties of the ink and the effect of the sintering agent concentration on conductive patterns. In this study, silver nanoparticles were prepared by chemical reduction, and environmentally-friendly synthetic methods using chemical additives that are non-toxic and which have no negative impact on the environment were selected, in an attempt to prepare a product with a single morphology, size, crystal state, and good dispersion.…”

Silver nanoparticles: Harnessing nanotechnology for enhanced antimicrobial efficacy in contemporary dental practice

“…Altogether, these unique attributes position silver nanoparticles as prized assets in a spectrum of fields, including medicine, electronics, catalysis, and sensing, promising a dynamic role in shaping the future of science and technology. 11,12 Silver nanoparticles showcase their remarkable antimicrobial prowess through a multifaceted array of mechanisms, underscoring their versatile utility in combatting microbial threats. These mechanisms encompass their capacity to adhere to microbial cells, infiltrate these cells, and initiate the generation of reactive oxygen species (ROS) and free radicals, thereby mounting a multi-pronged assault on the microbial adversaries.…”

Optimized Formulation and Realisation of Conductive Ink Specially Prepared for Flexible Substrate-Based Printed Electronic Circuits

“…Furthermore, saturation of the ink is essential for achieving high adhesion performance in inkjet-printed structures [27]. The physical properties of the ink on the substrate is therefore essential to the nal pattern that is deposited, as the spreading of the pattern laid by the conductive ink is in uenced by both the kinetic energy and viscosity of the droplet in addition to controlling the wettability of the ink on the substrate [27][28][29]. Hence it is highly imperative to study these criteria which in uence the accomplishment of highly accurate and reliable printed patterns with less degradation over time [30,31].…”