Corrosion resistance of Ca-P coating induced by layer-by-layer assembled polyvinylpyrrolidone/DNA multilayer on magnesium AZ31 alloy

Intermetallic Copper‐Based Electride Catalyst with High Activity for C–H Oxidation and Cycloaddition of CO2 into Epoxides

“…The fresh LaCu 0.67 Si 1.33 catalyst Cu LMM peak at 567.7 eV indicates the existence of Cu 0 (Figure S12a, Supporting Information), [ 52 ] while LaCu 0.67 Si 1.33 catalyst after reaction showed two peaks at 567.15 and 571.31 eV for Cu 0 and Cu + respectively (Figure S12b, Supporting Information)[52,53] implying that probably catalyst was partially oxidized on the surface during the reaction. Further, we also measured the Cu LMM spectra before and after reaction for copper powder catalyst to compare with our catalyst, in fresh copper powder two peaks at 568.3 and 569.9 eV were assigned for Cu 0 and Cu + oxidation states, [ 53 ] while copper powder after reaction displayed the two characteristic peaks at 569.6 and 570.4 eV attributed for Cu + and Cu +2 oxidation states (Figure S13, Supporting Information). [ 52,54 ] Thus, combined with the results of EPR and XPS, it could be concluded that the copper species in LaCu 0.67 Si 1.33 were partially oxidized to their higher oxidation states Cu + or Cu +2 on the surface during catalysis.…”

In vitro degradation, photo-dynamic and thermal antibacterial activities of Cu-bearing chlorophyllin-induced Ca–P coating on magnesium alloy AZ31

“…With the increase in the number of assembly layers, new SCC is attached to the sample surface by the electrostatic attraction in further to improve the thickness and compactness of the coating. Note that, although the density of functional groups in SCC is lower than that of DNA [ 9 , 10 ] and PAA [ 4 ] to induce Ca–P coating, the corrosion resistance is better than the DNA and PAA induced Ca–P coating, confirming the superiority of the LbL induction by SCC.…”

“…However, due to the limitations of temperature, voltage, pressure and other experimental conditions involved in the above preparation of the Ca–P coating, many macromolecules are difficult to be loaded into the coating, which limits the functionalization of the coating. Compared with the above mentioned methods, the prepared coating under mild experimental condition via layer-by-layer (LbL) assembling has advantages such as controllability, functionalization and molecular recognition for its good adhesion and homogeneity [ 10 ].…”

DNA/Magnetic Nanoparticles Composite to Attenuate Glass Surface Nanotopography for Enhanced Mesenchymal Stem Cell Differentiation

“…This method is widely used to indicate osteogenic cell differentiation [89,90], along with such methods as assessment of alkaline phosphatase activity [91,92] and expression of osteogenesis-related genes [93,94]. The ability of DNA to promote osteogenesis was previously demonstrated during its use as a component of coatings for dental and bone implants [95][96][97][98]. The presence of magnesium could also contribute to cell differentiation due to its role in the regulation of osteogenesis [99].…”