This work having an experimental character aims to study the drop coalescence process during the inkjet printing. Exemplified by titania-based inks, the influence ofn substrate wettability, desired structure design, and printing parameters, such as ink rheology, drop spacing, and drying temperature, on printing results is comprehensively investigated. The strategies of avoidance of printing defects, such as thickening, coffee-ring effect, undesired drop spreading, and coalescence, are discussed based on extensive experimental data. The obtained experimental data is compared with existing theoretical models and allows a deeper understanding and prediction of possible defects in inkjet printed structures, as well as setting parameters leading to better printing results.
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