Figure 2
Optical micrographs of dye-filled and epoxy-sealed channels showing changes of content volume over time (a) in an ambient environment and (b) in a humid environment with a water-saturated Kimwipe tissue in a sealed Petri dish. (c) Measurement of dye-occupied area as a function of time in both humid and ambient environments. Data were normalized to the 0 h measurement and the average was calculated from measurements from three channels. |