XPS characterisation of core–shell silica–polymer composite particles synthesised by atom transfer radical polymerisation in aqueous media

Anti-fouling poly(2-hydoxyethyl methacrylate) surface coatings with specific bacteria recognition capabilities

“…It is computed from (%C/6)/%Br; where 6 is the number of carbon atoms per HEMA repeat units. Note that elsewhere, Br3d could not be detected for glass-POEGMA hybrids, nor for POEGMA-modified silica particles prepared using the (3-(2-bromoisobutyryl)propyl) dimethylethoxysilane for attaching initiators to silica [32].…”

“…Elsewhere, in the case of ATRP grafting of poly(ammonium 2-sulfatoethyl methacrylate) (PSEM) to silica particles, the Si2p and Si2s peaks from the underlying silica particles remained clearly detected by XPS despite an important increase of silica particle hydrodynamic diameter from 360 to 560 nm [32]. The target DP for PSEM grafts was 500.…”

“…However, since the survey scan gives little evidence for Br3d from the surface of the initiator-treated silica, it is likely that the initiator grafting density was very low with a result of low grafting density of the polymer. Calculation of chain grafting density from the adsorbed amounts (C in mg/m 2 ) and the target DPs reported by Perruchot et al [32], indicates for example 0.06 chain/nm 2 for poly(2-(N-morpholino)ethyl methacrylate) [PMEMA] and 0.015 chain/nm 2 for poly(oligo(ethylene glycol) 7-8 methacrylate) [POEGMA]. Although these chain grafting densities are very low, the hydrodynamic diameter determined by dynamic light scattering (DLS) was 20 and 40 nm, respectively.…”

Preparation, Characterization, Thermal, and Flame‐Retardant Properties of Green Silicon‐Containing Epoxy/Functionalized Graphene Nanosheets Composites

“…Before modification, the most important signal in the wide-scan XPS spectrum was that of the GNSs, which did not contain silicon, as displayed in Figure 4(a). Figure 4(b) indicates that silane yielded Si2s and Si2p peaks at binding energies of 152.18 and 103.56 eV [14,15], respectively, indicating that the double bond of VTES was successfully grafted on the surfaces of the GNSs. Additionally, the narrow scan C1s spectrum of GNSs in Figure 4(c) includes typical C-C and C=C peaks at binding energies of 284.4 eV and 284.8 eV, respectively [16,17].…”

A novel approach for the preparation of organic-siloxane oligomers and the creation of hydrophobic surface

“…Therefore, the main peak may be reckoned from the fingerprint region for a given elements. In this case, almost every element in the sample can be measured and the atomic ratio also can be obtained from elemental analysis [32,33]. Clearly, if siloxane oligomers are successfully grafted onto polyacrylate chains, there will be the characteristic peaks of Si element.…”