In this work, two electrically conductive samples based on polypyrrole (PPy) and (PPy/TiO2) were synthesized via mini-emulsion polymerization. Synthesized used as functional fillers to formulate different screen-printing pastes (pastes A B) obtain the multi-purpose printed films with excellent properties, including electrical conductivity, antibacterial, photocatalytic activity, self-cleaning. ...

Solar cells have a metallization pattern to collect the current. Generally, simple metallization patterns, such as the H-grid metallization pattern, a cross-hatched pattern or a full metallization, are used. With the widely used technique of screen printing, however, virtually any metallization pattern of any topology can be realized, but the problem is how to design the optimum topology. The p...

This paper reports the design, simulation, fabrication, and experimental testing of a low-frequency piezoelectric energy harvester fabricated using screen-printing technology. A centrally supported meandering geometry is chosen to reduce the torsional mode effects during the unit vibrations and to achieve better power efficiency. The design experiences alternating stress along the beams and a s...

As use of digital devices has grown, university students (along with faculty and administrators) are considering whether academic reading should be done in print or on digital screens. Some studies have indicated that comprehension in the two media is equivalent, while other research has questioned this conclusion. Furthermore, we have little systematic knowledge about students’ own attitudes a...