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. Author manuscript; available in PMC: 2013 Feb 1.
Published in final edited form as: Acta Biomater. 2011 Oct 8;8(2):559–569. doi: 10.1016/j.actbio.2011.10.003

Figure 3. Surface chemistry.

Figure 3

(A) Advancing contact angle analysis for polymer film surfaces (n = 3). Polymer samples were incubated with one drop of dH2O for 2 hours at 37°C. At 2 hours for both 4%PEG-86%PCL-10%cPCL and 8%PEG-82%PCL-10%cPCL, contact angle value is < 10° because the drop was absorbed by the material. *p < 0.05, †p < 0.01 between 0 and 2 hours measurements on the sample polymer type. (B) Polymer-coated glass cover slips were incubated with carboxylate-terminated, fluorescence-conjugated polystyrene microspheres to evaluate surface chemistry. Negative surfaces exhibit a lower fluorescence signal, likely due to steric hinderance and/or charge repulsion (n = 4). *p < 0.05 vs. 100%PCL, †p < 0.05 vs. all other test substrates.