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Inkjet deposition of silver films is widely applied in printed electronics, as well as in architecture and interior design to produce decorative glass surfaces. The printing process can speed up production, save material and minimize the factor of human error. However, to achieve a satisfactory printed material, it is necessary to formulate an ink that, when combined with the substrate, produces a product with desired properties. As part of this experiment, amphiphilic silver nanoparticles (AgNP) suitable for printing on glass were synthesized. To adjust the hydrophilic–lipophilic balance, the AgNPs were first coated with a hydrophilic stabilizer poly(acrylic acid) and then modified with a secondary stabilizer (3- morpholinopropylamine) via amide bonding. [1] In order to obtain inkjet-printable conductive ink, the amphiphilic silver nanoparticles were dispersed in a three-component solvent system (water, ethanol and ethylene glycol), followed by printing on glass slides. The necessary sintering process was carried out using an intense pulsed light (IPL) system (λ=190- 1100 nm), and the results were compared with samples sintered using the traditional thermal method. A statistical software package (Design-Expert, version 6) was used to assess the importance of the process parameters. Input factors for designing the experiments were source energy and number of flashes for photothermal sintering, and temperature and processing time for thermal sintering. In both cases, the sheet resistance was measured as a response and was found to be lower than 2 Ω/sq for all samples. The obtained simulation models describe the experimental values with an R 2 value larger than 0.9. Sintering using IPL resulted in films with conductivities similar to those obtained with the thermal method, but the optimal duration of the process is significantly shorter (< 1 s). The morphology of the printed films before and after the sintering processes was compared using atomic force microscopy. |
