Octacalcium phosphate (OCP) has been used as a bone replacement material due to its higher affinity. However, the mechanism of affinity not clarified. Since 100 crystalline plane OCP is closely involved in biological reactions during osteogenesis, it important expose fluid precisely measure interfacial reactions. In this study, plate-like crystals were fixed on conductive substrate form single-particle deposition, and thin films with exposing planes fabricated. Then, characteristics...

We synthesized citric acid (Cit)-coordinated Eu3+ and F– codoped hydroxyapatite (Cit/Eu:HA-F) nanoparticles (NPs) investigated their ion diffusion processes based on photoluminescence (PL) properties at the near-surfaces with thermal treatment. At 85 °C, Cit coordination layer effectively suppressed nonradiative deactivation of HA NP surfaces in PL process, quantum yield (ηint) ions reached a maximum value ca. 33%, indicating highest efficiency system. 250 was decomposed into aconitic high...

Citric acid (Cit)-coordinated hydroxyapatite nanoparticles (NPs) were successfully nanohybridized with hyaluronic (HYA) to form transparent membranes, where hydrogen bonds formed between the NPs and HYA through Cit mediation.

We successfully synthesized organic acid (citric (Cit), tris(hydroxymethyl)aminomethane (Tris))-coordinated Eu3+ and F– co-doped hydroxyapatite (HA) particles, control of the photoluminescence (PL) characteristics were evaluated discussed. Specifically, Cit ions suppressed nonradiative deactivation ion doped HA (Eu:HA) achieving higher ηint (33.7%) red color emission. The carbon compounds, which emitted blue PL at 400–540 nm, precipitated on particles by thermochemical changes 180 °C in...

In the biomedical fields of bone regenerative therapy, immobilization proteins on bioceramic particles to maintain their highly ordered structures is significantly important. this review, we comprehensively discussed importance specific surface layer, which can be called "non-apatitic layer", affecting such as hydroxyapatite and amorphous silica. It was suggested that water molecules ions contained in non-apatitic layer determine control protein states. silica particles, direct interactions...

As an innovative concept, we successfully controlled the porphyrin/apatite interfacial formation processes by a bone regeneration process. In particular, molecular state of anionic porphyrin (α,β,γ,δ-tetrakis(4-carboxyphenyl)porphyrin (TCPP)) immobilized on apatites mimicking mineralization mechanism is precisely investigated and for surface design in biomedical applications. result, TCPP spontaneously became incorporated into apatite surfaces during nucleation stages calcium-deficient...

We successfully synthesized folic acid (FA) immobilized hydroxyapatite (HA) nanoparticles without using a mediative reagent (e.g., silane coupling agent), and the immobilization states were evaluated discussed. The HA with higher biocompatibility have two different planes, namely,

We successfully synthesized the photofunctionalized octacalcium phosphate (OCP) with layered structures and high biosafety. Specifically, two systems of europium(III) ion (Eu3+)-doped OCP particles (OCP:Eu) succinate (Suc)-modified OCP:Eu (Suc-OCP:Eu) were by substituting an Eu3+ a Ca2+ while maintaining structures. The Suc-OCP:Eu (crystal shape sizes: ca. 0.4–1.0 μm) exhibited strong luminescence based on f–f transition ion, intensity quantum efficiency increased increasing initial Eu molar...

Interfacial interactions between anionic porphyrin (TCPP) and α-tricalcium phosphate in hydrolysis reaction were clarified, the orientation of TCPP molecules on reactive calcium phosphates can be controlled by mineralization process.

Phosphorus-modified mesoporous silica nanospheres have strong affinity with Znq 2 , and their host–guest complex dramatically prevents biodegradation of the host surface.

Promotion of the immobilization cationic porphyrin on Eu( iii ) ion-doped hydroxyapatite nanoparticles through citric acid as bonding layer was achieved.

Soft magnetic composites (SMCs) are consolidated ferromagnetic powders covered with polymers. Ultra-thin flat powder can effectively reduce eddy current loss of SMCs, even at the frequency which next-generation semiconductor devices driven. In this study, pure iron were processed ball-milling to obtain ultra-thin and prepare SMC. The effect aspect ratio on mechanical strength SMC was investigated. Although maximum bending stress made particles an 1140 reached 60% sintered powder, increase in...

The promotion of the K-ion introduction into Ca-deficient hydroxyapatite (CDHA) via a citric acid coordination technique was clarified, resulting in characteristic phase transition thermal stabilization K-ion-doped CDHA.

The highly-oriented collagen fibrils that paralleled to one (rubbing) direction were fabricated by which the molecular solution was spin-coated and self-assembled on rubbed polyimide film. Subsequently, hydroxyapatite crystals precipitated immersing into simulated body fluid. In details, carboxyl groups used as a reaction field for adsorption of Ca 2+ ions promoted formation crystals. As result, grew along -axis leading stable interfaces between fibrils. Moreover, oriented fibril arrays more...

Abstract Alpha‐tricalcium phosphate (α‐TCP), which can be converted to calcium‐deficient hydroxyapatite (HA) by hydrolysis reaction, has been researched as a bone filling. Although the composites of α‐TCP with various organic molecules exhibit novel functionality, reaction based on addition interactive not understood. Investigation conversion process under conditions lead elucidation biomineralization process. In this study, we investigated HA in presence orotic acid (Ort). As result, rate...