FIG. 8.

Pencil-type dispensing system. (a) Overview of pencil-type dispensing module; (b) on-demand dispensing result in 96 well-plate with preloaded wells of 200 μl of 2.5 mM phenolphthalein solution. The symbols O and X indicate wells with a 1 M NaOH droplet and wells with no NaOH droplet, respectively. A NaOH droplet was dispensed into desired wells, (i) every well, (ii) every two wells, (iii) every three wells, and (iv) every four wells. The process from (i) to (iv) was repeated in the rest of the well-plate. (Multimedia view) [URL: http://dx.doi.org/10.1063/1.4935937.1] Download video file ^{(5.3MB, avi)} DOI: 10.1063/1.4935937.1