Enhancing CaP Biomimetic Growth on TiO₂ Cuboids Nanoparticles via Highly Reactive Facets

Abstract

Pure decahedral anatase TiO(2) particles with high content of reactive {001} facets were obtained from titanium(IV) tetrachloride (TiCl(4)) using a microemulsions droplet system at specific conditions as chemical microreactor. The product was systematically characterized by X-ray diffraction, field-emission scanning and transmission electron microscopy (FE-SEM, TEM), N(2) adsorption-desorption isotherms, FT-IR and UV-vis spectroscopy, and photoluminescence studies. The obtained cuboids around 90 nm in size have a uniform and dense surface morphology with a BET specific surface area of 11.91 m(2) g(-1) and a band gap energy (3.18 eV) slightly inferior to the anatase dominated by the less-reactive {101} surface (3.20 eV). The presence of reactive facets on titania anatase favors the biomimetic growth of amorphous tricalcium phosphate after the first day of immersion in simulated human plasma. The results presented here can facilitate and improve the integration of anchored implants and enhance the biological responses to the soft tissues.

Striped, bioactive Ce–TiO2materials with peroxynitrite-scavenging activity

“…In a previous study, we have demonstrated that the presence of RSO 3À anions in a water/AOT/n-heptane microemulsion leads to the inhibition of some crystal facets' growth and leads to the formation of small-sized anatase nanocrsytallite embryos with a characteristic shape (or facets exposed to the surface). 43 Here with an interfacial co-surfactantsurfactant molar ratio ¼ 8, probably the -OH groups of butanol can act likewise. It is known that several ligands that contain -COO À , -CO and ROH À groups are stronger eld ligands than Cl À and OH À ions and substitute them in the (Ti(OH) x Cl y ) 2À complexes.…”

<strong>3D hierarchically scaffolds for bone repair: at the crossroads of experimental and computational outlooks</strong>

“…Tetraethyl orthosilicate (TEOS) was added to different bile salts mixture solutions. The mixture was stirred and left for 24 h in an autoclave at 100 º C. The obtained materials were calcined [12]. The material final structures take place through a vesicle to sponge-like phase transformation whose driving force seems to be the interaction of bile salts and silica species during the material polymerization synthesis step.…”

Solvothermal Synthesis of Anatase TiO2 Nanosheets with Exposed {001} Facets

“…Shi et al (2014) reported the fabrication of anatase TiO 2 hollow nanosheets with the size of 550 nm having total surface area of ~17 m 2 g -1 with the percentage of reactive facets of 65%. Similarly, many studies were carried out to get more percentage of reactive facets {001} but with large size and lower surface area (Dozzi & Selli 2013;Gu et al 2012;Ruso et al 2013). F -ions tend to selectively adsorb on the surface of {001} facets and as a result, it lowers the surface free energy of the reactive facets and stabilize them (Shi et al 2014).…”