Gradient Technology for High-Throughput Screening of Interactions between Cells and Nanostructured Materials
Figure 1
(a) Concentration of COOH/R groups from the C1s coreline XP spectra (◊) and the O/C ratio across a silicon substrate coated with a plasma polymer gradient (■). (b) High-resolution scan of the C1s coreline peak at the carboxylic acid rich end of the plasma polymer gradient. The carboxylic acid peak occurs at 289.2 eV.
