Mineralized collagen fibrils constitute a basic structural unit of collagenous mineralized tissues such as dentin and bone. Understanding the mechanisms mineralization is vital for development new materials hard tissue repair. We carried out bioinspired reconstituted using poly l-aspartic acid, an analogue noncollagenous acidic proteins. Transmission electron microscopy diffraction studies reaction products revealed stacks ribbon-shaped apatitic crystals, deposited within with their c-axes...

The SIBLING (small integrin-binding ligand N-linked glycoproteins) family is the major group of noncollagenous proteins in bone and dentin. These extremely acidic highly phosphorylated extracellular play critical roles formation collagenous mineralized tissues. Whereas lack individual SIBLINGs causes significant mineralization defects vivo, none them led to a complete cessation suggesting that these have overlapping functions. To assess whether different regulate biomineralization similar...

Ce1-xZrxO2 nanoparticle sols (x = 0−1) are synthesized by hydroxide coprecipitation of a mixed precursor solution cerium ammonium nitrate and zirconyl chloride followed redispersion in an aqueous medium sonication using nitric acid as the peptizing agent. The obtained highly concentrated stable for weeks. Analytical ultracentrifugation measurements show particularly narrow particle distribution with average size about 3.5 nm pure CeO2 2.5 ZrO2 nanoparticles. Wide-angle X-ray scattering (XRD)...

Sodium alginate and gelatin are biocompatible & biodegradable natural polymer hydrogels, which widely investigated for application in tissue engineering using 3D printing bioprinting fabrication techniques. The major challenge of hydrogels is their lack regeneration ability, uncontrolled swelling, degradation inability to hold structure on own. Free hydroxyl groups the surface SiO2 nanoparticles have ability chemically interact with alginate-gelatin network, can be explored achieve above...

Monitoring wide-range carbon dioxide (CO2) levels with superior sensing performance is extremely important for environmental, human health, safety, and space applications. The reported chemiresistive sensors in the literature have critical drawbacks such as high-temperature operation long response recovery times (∼25 min), which remains a challenge developing CO2 sensors. Against these drawbacks, we report Gd0.2La0.2Y0.2Hf0.2Zr0.2O2 (Y-HEC)-based obtained by depositing Y-HEC on glass...

Highly ordered 3D mesostructures of ceria have been obtained by a block-copolymer-assisted assembly near-monodisperse, highly crystalline nanoparticle sols. The preformed nanoparticles diameter ≈3 nm and are stable in solution without any organic functionalization. mesoporous materials were analyzed various methods including TEM (see picture), SAXS, WAXS, physisorption.

We report for the first time a simple, scalable approach synthesis of single-phase multi-component fluorite oxide nanoparticle sols: Gd0.2La0.2Y0.2Hf0.2Zr0.2O2 (GLYHZ) and Gd0.2La0.2Ce0.2Hf0.2Zr0.2O2 (GLCHZ) using chemical co-precipitation followed by peptization in acidic medium under mild conditions (≤80 °C). High resolution transmission electron microscopy (HRTEM) along with selected area diffraction (SAED) studies confirm fully crystalline cubic nanoparticles having particle size about...

Abstract Porous polymer beads have been used as templates in which sol–gel chemistry was conducted for the formation of porous titanium dioxide and titania/aluminum, gallium, or indium oxide spheres. The addition 5, 10, 15 wt.‐% second metal to titania studied, resulting little variation final porous‐sphere diameter, but a decreased nanocrystal size an increased specific surface area material. crystallinity samples observed after heating at 550, 750, 950 °C anatase rutile phase transitions...

High-precision nanocasting using crystalline ceria/zirconia nanoparticle sols is employed for successful replication of hierarchical wood tissue. Full retention the spiraling cellulose microfibril orientation after template removal unambiguously proved first time small angle X-ray scattering (see figure). Electron microscopy reveals that morphological details are well preserved over four levels hierarchy. Nature generates highly intricate structures with exceptional mechanical properties...

Oxygen vacancy control has been one of the most efficient methods to tune physicochemical properties conventional oxide materials. A new conceptual multi-principal (MPO) is still lacking a approach introduce oxygen vacancies for tuning its inherent properties. Taking rare earth-transition metal (CeGdLa-Zr/Hf) oxides as model systems, here we report temperature induced generation (OVG) phenomenon in MPOs. It found that OVG strongly dependent on composition MPOs showing different degrees loss...

Collagen and amelogenin are two major extracellular organic matrix proteins of dentin enamel, the mineralized tissues comprising a tooth crown. They both present at dentin-enamel boundary (DEB), remarkably robust interface holding enamel together. It is believed that interactions protein assemblies regulate growth structural organization mineral crystals DEB, leading to continuum molecular level between phases. To gain insight into mechanisms DEB formation basis its mechanical resiliency we...

Fluorite-structured oxides constitute an important category of with a wide range high-temperature applications. Following the concept high entropy, high-entropy fluorite (HEFOs) have showcased intriguing application potential. However, unlocking this potential necessitates assessment their long-term stability under conditions. In study, we conducted prolonged heat treatment at 1000 °C on typical HEFO, specifically (CeHfZrGdLa)O_x. After 100 hours, intensity X-ray diffraction (XRD)...