Figure 3
From: Large area micropatterning of cells on polydimethylsiloxane surfaces
Surface characterization and mechanical property measurement. (A) Observation of peaks at 3000 and 1720 cm-1 indicates that benzophenone is washed away upon rinsing PDMS with 50 wt% acetone solution for 1 minute and overnight incubation in water (top). Washing with acetone for 1 minute (middle) and untreated PDMS (lower) are shown for comparison (B) Sample loading curves of nanoindentation measurements on PDMS. The 20:1 (base:crosslinker ratio) shows more compliant surfaces in comparison to the stiffer 10:1 and 5:1 samples.