Figure 2
From: Grafting of short elastin-like peptides using an electric field
Assembly of charged ELP in an electric field impacts hydrated mass loading. Hydrated mass loading is monitored with time by a quartz crystal microbalance with dissipation in an electrochemical module at 20 °C as (a) uncharged ELP and (b) (−)charged ELP is assembled at four grafting conditions: (1) − 0.3 V AEF in DI water (light blue for uncharged, blue for (−)charged); (2) + 0.3 V AEF in water (light red for uncharged, red for (−)charged); (3) no AEF in water (grey for uncharged, black for (−)charged); and (4) no AEF in 0.5 M NaCl (light orange for uncharged, orange for (-)charged). All voltages are vs. a Ag/AgCl reference. Recall that the potential difference measured between the working and counter electrode, which generates the field, is − 1.0 V to − 1.1 V at − 0.3 V vs. Ag/AgCl and is − 0.2 V to − 0.3 V at + 0.3 V vs. Ag/AgCl.
