XPS chemical bonding functional monomer primer zirconia. These results demonstrated that 4-META and MDP adsorbed to zirconia, whereas the VTD and TMSPMA did not. The / ratio for the surface treated with a carboxylic anhydride (4-methacryloyloxyethyl trimellitate anhydride 4-META) primer was smaller than that treated with MDP. However, the S 2p peak of a triazine dithiol monomer (6-1,3,5-triazine-2,4-dithione VTD) and Si 2p peak of silane (3-trimethoxysilylpropyl methacrylate TMSPMA) were not detected in the spectra of the primed surface. XPS analysis revealed that phosphorus was incorporated into zirconia when the surface was treated with a primer containing phosphate monomer (10-methacryloyloxydecyl dihydrogen phosphate MDP). Two types of zirconia disks cleaned with piranha solution were treated with one of two phosphate primers (Alloy Primer, Clearfil Ceramic Primer) or a carboxylic primer (Super-Bond C&B Monomer), and rinsed 3 times with acetone. All rights reserved.We investigated the chemical interaction between zirconia surfaces and functional monomers using X-ray photoelectron spectroscopy (XPS). Surface bioactivation of zirconia-containing components for dental implant applications will enable their improved clinical performance by incorporating signalling oligopeptides to accelerate osseointegration, improving permucosal sealing, and/or incorporating antimicrobial properties to prevent peri-implant infections.īiofunctionalization Dental implants Oligopeptides Surface modification Zirconia Zirconia/titanium.Ĭopyright © 2015 Elsevier Ltd. We successfully developed stable functional biocoatings on zirconia and biocermets made of oligopeptides. Furthermore, RGD-functionalized surfaces significantly enhanced osteoblast adhesion on all types of substrates, which demonstrated their successful bioactivation. This was further confirmed by visualizing the functionalized surfaces with flourescence-labelled RGD-peptides before and after ultrasonication. 16a) can be further deconvoluted into two neighboring peaks centered at B.E. It is shown that the shape and the binding energy positions of zirconium and yttrium core levels are independent of the yttria stoichiometry when the content of. Nitrogen XPS-peak confirmed that RGD-peptides were chemically-attached on the silanized samples. The XPS peak representing the binding energy (B.E.) for Zr-3d orbital (Fig. Pre-osteoblasts adhesion on the functionalized surfaces was also studied.ġ0-min air-plasma treatment effectively activated all types of materials with no detrimental effects on the material structure and hardness. Coatings' stability was evaluated after 2h sonication in water.
Successful treatments after each step of the process were assessed by surface physical and chemical characterization with water contact angles and XPS, respectively. assigned to Cu+ species located in the zirconia network. We selected this oligopeptide as a model peptide to validate the effectiveness of the biofunctionalization process. However, the persistence of the satellite peak of the Cu2p3/2 line in the (Cu/Zr0.5)K spectra. The surfaces were coated by tethering a purposely-designed RGD-containing peptide. Surface activation by plasma or alkaline-etching was optimized. The data obtained by Mssbauer spectroscopy show that iron is present in the fresh catalysts at the surface of zirconia both as isolated cations and small ferric oxide particles.
At the same time, the Ag3d peak showed a peak. Ironpromoted sulfated zirconia catalysts have been characterized by Mssbauer spectroscopy and XPS before and after catalytic test for the isomerization of nbutane. In case of the anti-CYFRA-21-1/APTES/ZrO 2 /ITO, three distinct peaks are observed at 399.5, 400.3, and 401.5 eV (Figure 5h). This finding confirmed that high temperature and polarization caused a significant dewetting of the silver and formation of porous layer. Figure 5g shows nitrogen core level XPS of APTES modified ZrO 2 where the BE peak seen at 399.2 eV is attributed to the nitrogen present in the APTES. The biosurfaces were activated, silanized, and functionalized with coatings made of oligopeptides. For the sample after polarization, the XPS wide scan showed in addition to C, O, and Ag, also yttrium and zirconium peaks. Here, we have biofunctionalized biomaterials based on zirconia of much interest for dentistry: the widely used bioceramic 3Y-TZP and a newly developed 3Y-TZP/Ti biocermet. Titanium materials have been functionalized with biomolecules as a modern strategy to incorporate bioactive motifs that will expand and improve their biomedical applications.