Figure 4.

Experimental validation of the uniformity of membrane stretching. (a) Schematic of the representative locations selected for characterizing the deformation field throughout the cell-culture region on the membrane. (b) Fluorescent images of micropatterned circular islands at different locations, before and after stretch. (c) Distribution of longitudinal and transverse stretch ratio at different locations. Error bar: standard deviation. Note that the slightly less longitudinal strain (by <2%) from the designed 15% stretch was due to the fact that the starting point of cam rotation was not exactly at the lowest stretch.