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Spatially selective patterning of zinc oxide (ZnO) thin film was achieved by inkjet printing of ZnO sol-gel precursor. Factors affecting inkjet printed patterns including ink formulation and process parameters were investigated and are discussed in this paper. The morphologies of inkjet printed ZnO patterns were affected by the `coffee ring' effect, is depend on the evaporation rate, surface tension...
The dimensionless Ohnesorge number (Oh) describes the relative importance of viscous to surface tension effects, which is commonly used to characterize jet breakup. In this study, the experimental results have proven that single droplets can be jetted for 0.02 < Oh < 1.5, for viscosity > 50 mPas, using different mixture compositions of glycerol in water (0 - 80 wt%) as the ink. This is contrary...
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