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X-ray photoelectron measurement of Alg/peptide coated Ti-6Al-4V substrates and an uncoated Ti-6Al-4V alloy substrate showed the atomic concentration on the surface in percent. Substrates were immersed in polyethyleneimine (PEI) (5% w/w in MilliQ) before Alg/PLL (each 1 mg/mL in MilliQ, volume ratio 4:1), and Alg/NITEGE (each 1 mg/mL, volume ratio 1:1) nanoparticle suspensions were spray-coated onto the surfaces.
