Since its invention in ancient times, relief printing, commonly called flexography, has been used to mass-produce artifacts ranging from decorative graphics to printed media. Now, higher-resolution flexography is essential to manufacturing low-cost, large-area printed electronics. However, because of contact-mediated liquid instabilities and spreading, the resolution of flexographic printing us...

Results of print trials of different silver-based conducting inks on different paper and paperboard substrates are presented. Printability (based on optical appearance) and electrical properties are analyzed for their dependence on substrate properties. In particular, it was observed that traces printed with solvent-based inks have better print quality compared to water-based inks at higher ani...

Silver inks find applications in printed electronics as conductive electrodes. Amphiphilic silver microparticles are prepared by modifying PAA-capped particles with functional amines via an amidation reaction. These modified silver particles can be dispersed in a wide variety of solvents ranging from water (ε 1⁄4 80.4) to lipophilic alcohols (ε 1⁄4 3e17) to yield conductive inks with tunable we...

This article aims to provide a new and fast method for differentiation of inks on a questioned document. The data acquisition was carried out by designing specific image analysis software for evaluating thin layer chromatograms (TLC-IA). The ink spot was extracted from the document using methanol and separated by TLC using plastic sheet silica gel 60 without fluorescent indicator, and a mixture...

High viscosity ink is a potential solution for the improvement of current 3D ink jetting technology. In this study, experiments are carried out to study a series of inks with differing viscosities jetted with PicoDot jet valves under different process parameters of temperature and pressure. Results show that a wide range of ink materials from low viscosity (water like materials) to very high vi...

Perovskite solar cells have potential to deliver terawatt-scale power via low-cost manufacturing. However, scaling is limited by slow, high-temperature annealing of the inorganic transport layers and lack reliable, large-area methods for depositing thin (< 30 nm) charge (CTLs). We present a method ultrathin NiOx hole (HTLs) pairing high-speed (60 m/min) flexographic printing with rapidly anneal...

An analytical procedure for examination of fountain pen and ballpoint pen inks was developed, using the PrinCe 550 capillary electrophoresis system with spectrophotometric detection. Samples were taken from ink lines in the form of paper microdots of 0.8 mm diameter. The ink sample was extracted from paper with pyridine-water solution (1:1). The detection was performed at wavelengths of 215, 37...