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. 2020 Aug 12;6(33):eaba5029. doi: 10.1126/sciadv.aba5029

Fig. 1. Coffee-ring effect.

Fig. 1

Inverted optical micrographs of dried inkjet-printed droplets on clean glass: (A to C) common solution-processed 2D crystal dispersions (sections S1 and S2). (D to H) Formulated inks via solvent exchange in IPA or binary solvents of IPA/ethanol (10 volume %), IPA/2-butanol (10 and 20 volume %), and IPA/t-butanol (10 volume %). Scale bar, 50 μm. The brightness and contrast are optimized for clarity. MoS2 is the 2D crystal example. Substrate is Si/SiO2 at 60°C. (I) Schematic drying process showing CRE formation (8).