Fig. 2
From: Modified silicas with different structure of grafted methylphenylsiloxane layer
XPS spectra of silica modified with PMPS using different synthetic protocols. Spectra present the changes in binding energy C1s and Si2p for composites of silica modified with PMPS using protocol 1 (samples 1–3, vol% of the modifying mixture at each stage 25/35/40) and protocol 2 (samples 4–6, vol% of the modifying mixture at each stage 40/35/25) by chemical assembly process in the presence of dimethyl carbonate at PMPS/DMC ratio according to the schemes “L-S” (samples 1 and 6), “M” (samples 2 and 5) and “S-L” (samples 3 and 4) as represented in Table 1