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Surface chemistry analysis with XPS
This figure shows the XPS spectra of ammonia plasma surface-modified PLLA scaffolds at various exposure powers (W) and times (min). (A) Non-plasma-treated control, (B) 50 W 2 minutes, (C) 50 W 5 minutes, (D) 50 W 10 minutes, (E) 100 W 2 minutes, (F) 100 W 5 minutes, (G) 100 W 10 minutes. XPS, X-ray photoelectron spectroscopy; PLLA, poly(L-lactide); CPS, counts per second.
