Adding a dash of alcohol suppresses coffee ring effect in 2D printing inks – Ars Technica

Enlarge/ The coffee ring effect happens because evaporation occurs faster at the edge than at the center.
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Inkjet printing of two-dimensional crystals will be crucial for ushering in the next generation of printed electronics. While the technology has made a lot of progress in recent years, a major challenge to industrial-scale printed electronic components is achieving uniform distribution of the crystals; uneven distribution can result in faulty devices. The …

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