Figure 3
From: High-throughput rapid-prototyping of low-cost paper-based microfluidics
Characterization of paper substrates and inks. (a) SEM images of the surface and cross-section of delicate task wipers and chromatography paper. (b) Diffusing ink through chromatography paper at different plotting speeds from 1% (5.45 mm/s) to 110% (177 mm/s), and number of passes using fine and broad-tip of Comix marker. (c) Images of a 2-µl-droplet on different substrates covered with the inks. C and W stands for chromatography paper and Wipers, respectively. (d) Contact angle of a 2-µl-droplet on substrates covered with Comix and Deli ink (data are average of left and right contact angles). C and W stands for chromatography paper and Wipers, respectively. (e) Viscosity of Comix and Deli inks at 23 °C. Measurements are average of six repeats for both contact angle and viscosity.
