Covalent immobilization of graphene oxide on biomedical grade CoCr alloy by an improved multilayer system assembly via Silane/GO bonding

Eco-friendly preparation and characterization of high-performance electrothermal graphene-AgNPs/lignocellulose composites

“…As shown in Fig. 2, the broad absorption peak at 3410 cm −1 was caused by the phenolic and aliphatic hydroxyl groups of the LCF side chain, 32 the absorption peak at 2920 cm −1 was attributed to the absorption vibration peaks of methyl and methylene groups in LCF, 33,34 the absorption peak at 1636 cm −1 was due to the C]C stretching vibrations of the typical aromatic rings of LCF, 35,36 the absorption peak at 1018 cm −1 was assigned to the C-O stretching vibrations of methoxy, aliphatic secondary alcohols and ethers in LCF, 37 and the absorption peaks at 1636 cm −1 and 1018 cm −1 were typical characteristic infrared absorption peaks of LCF. These peaks were clearly observed in the composite lms with the four ller contents.…”

Barrier Graphene Oxide on a CoCr Alloy via Silane/GO Covalent Bonding and Its Electrochemical Behavior in a Simulated Synovial Fluid Electrolyte

“…The lower resistance of the alkali-formed oxide layer is associated with a change in chemical composition, as alkaline NaOH treatments in CoCr lead to the predominant formation of Co oxides and inhibit the formation of chromium oxi-hydroxides in the oxide layer [44,59]. This effect is also observed in CoCr-OH surfaces that indicate improvement in the corrosion behavior, but the R L values are lower than those obtained in CoCr surfaces.…”

“…All multilayer surfaces were obtained as previously described [44]. Briefly, the CoCr surface was hydroxylated through alkalization in NaOH 5 M for 2 h to obtain the surface, named CoCr-OH.…”

“…It has been shown in the literature that it is possible to anchor GO monolayers to silica via direct Si-O covalent bonds, avoiding the intercalation of oxidizing species at the interface and oxidation of Si [42,43]. Recently, this strategy has been used with GO monolayers that were covalently immobilized on CoCr and described by the authors in [44]. For this purpose, the authors used 3-Aminopropyl-triethoxysilane (APTES) as a silane coupling agent that works as an intermediate for the covalent attachment of self-assembled silane monolayers (SAMs) on the oxide surface [45] of the CoCr alloy.…”

On Antimicrobial Polymers: Development, Mechanism of Action, International Testing Procedures, and Applications

“…It is also a semiconductor [ 164 ]. Since it is hydrophilic, the NPs usually dissolve in water, with the highest solubility of 6.6 µg/mL in deionized water [ 165 , 166 ]. At particular concentrations, GO can be toxic to species such as earthworms and zebrafish [ 164 , 167 ].…”