Crystallization of bioinspired citrate-functionalized nanoapatite with tailored carbonate content

Delgado-López, José Manuel; Iafisco, Michele; Rodriguez, Isaac A.; Tampieri, Anna; Prat, María; Gómez‐Morales, Jaime

doi:10.1016/j.actbio.2012.04.046

Cited by 146 publications

(206 citation statements)

References 47 publications

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“…Either found in Nature (bones and teeth [1], rocks and sediments [2,3]) or obtained by synthesis, these minerals are in particular well-known in various scientific communities including medical and biomaterials sciences (bone tissue engineering, nanomedicine) [1,[4][5][6], anthropology [7][8][9], geology/mineralogy [2,3,10], or else environmental sciences (immobilization of phosphates and metallic compounds, nuclear sciences) [11], among other domains. If hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 ) and fluorapatite (Ca 10 (PO 4 ) 6 F 2 ) are probably the most illustrious examples in this series of compounds, chlorinated or bromated counterparts as well as apatites containing other cations than calcium (such as cadmium, lead, magnesium, strontium.…”

Section: Introductive Assessmentsmentioning

confidence: 99%

A comprehensive guide to experimental and predicted thermodynamic properties of phosphate apatite minerals in view of applicative purposes

Drouet

2015

The Journal of Chemical Thermodynamics

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a b s t r a c tApatite minerals represent a major class of ionic compounds of interest to many disciplines including medical sciences, geology, anthropology, cosmology, environmental and nuclear sciences. Yet, these compounds have not received great attention from a thermodynamic viewpoint, and some diverging dataoften drawn from molecular modeling assays -were reported. In this contribution, an extensive literature overview of available experimental-based data on M 10 (PO 4 ) 6 X 2 apatites with M = Ca, Ba, Sr, Mg, Cd, Pb, Cu, Zn and X = OH, F, Cl or Br has first been made, on the basis of standard formation energetics (DH f and DG f ) as well as entropy S°and molar heat capacity C p;m . The case of oxyapatite was also included. From this overview, it was then possible to identify general tendencies, evidencing in particular the primary role of electronegativity and secondarily of ionic size. Using the experimental data as reference, several predictive thermodynamic methods were then evaluated, including the volume-based-thermodynamics (VBT) method and a more advanced additive contributional model. In particular, the latter allowed obtaining estimates of thermodynamic data of phosphate apatites within a maximum of 1% of relative error, generally within 0.5%. Fitted h i , g i and s i contributive parameters are given for bivalent cations and monovalent anions, so as to derive, by simple summation, coherent estimates of DH f , DG f and S°f or any apatite composition, at T = 298 K. The model was shown to also lead to consistent estimates in cases of solid-solutions or even non-stoichiometric or hydrated phosphates apatites. Ultimately, a periodic table of recommended thermodynamic properties of 33 phosphate apatites end-members (at T = 298 K and 1 bar) was established, with the view to serve as an easily readable reference database.

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Section: Introductive Assessmentsmentioning

confidence: 99%

A comprehensive guide to experimental and predicted thermodynamic properties of phosphate apatite minerals in view of applicative purposes

Drouet

2015

The Journal of Chemical Thermodynamics

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“…[7]. The growth mechanism of biomimetic nanocrystalline apatites in the presence of citrate has been thoroughly characterized [9][10][11][12]. Following the proposed mechanism, citrate drives the growth pathway via an amorphous precursor stabilizing the amorphous calcium phosphate (ACP) at the early stage, controlling the amorphous → apatite transformation and the nanocrystal size by adsorption on the 1010 face.…”

Section: Introductionmentioning

confidence: 99%

Habit Change of Monoclinic Hydroxyapatite Crystals Growing from Aqueous Solution in the Presence of Citrate Ions: The Role of 2D Epitaxy

2018

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Calcium hydroxyapatite (HAp) has been crystallized from aqueous solutions in the presence of citrate ions, in two temperature intervals. At lower temperature, where citrate could form the stable 3D-ordered phase Ca-citrate-tetrahydrate (Ca-Cit-TH), only the monoclinic (P2 1 /c) HAp polymorph occurs and assumes the shape of fence-like aggregates, built by sharply [010] elongated lamellae dominated by the pinacoid {001}. This pronounced anisotropic growth habit is compared with the usually considered rod-like pseudo-hexagonal occurring in pure aqueous solution growth. The habit change is interpreted by assuming that 2D islands of Ca-citrate-tetrahydrate can be adsorbed as epimonolayers of thickness d 001 onto the different growth forms: {001}, {100}, 102 , {010}, and 101 of HAp. A comparison is made among the corresponding coincidence lattices, in order to explain on reticular basis the selective adsorption of citrate on the {001} HAp form. The role exerted by the 2D-epitaxially adsorbed Ca-Cit-TH as a "mortar" in the monoclinic HAp "brick" assembly is outlined as well.

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“…Among these methods, hydrothermal method has raised up much interest owing to its good repeatability, wide range of hydrothermal temperature, simplicity of operation; and still for this method , addictives such as polymers [20,21], surfactants [22], small molecules [23][24][25][26][27][28][29][30][31][32][33][34] are necessary to tailor the morphology of HA and enhance the colloidal stability. Sodium citrate, a typical small molecule widely distributed in organisms, is preferentially favored owing to its excellent biocompatibility, strong binding ability with calcium ions and great dispersing ability [10,29,32,34].…”

Section: Introductionmentioning

confidence: 99%

“…In most hydrothermal processes involving sodium citrate, hydrothermal temperature and time were highly considered for evaluation of growth of HA [32]. The obtained particles are needle-like with mean lengths ranging from 20-100 nm.…”

Section: Introductionmentioning

confidence: 99%

Effects of hydrothermal temperature and time on hydrothermal synthesis of colloidal hydroxyapatite nanorods in the presence of sodium citrate

Jin

Chen

Cheng

et al. 2015

Journal of Colloid and Interface Science

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Crystallization of bioinspired citrate-functionalized nanoapatite with tailored carbonate content

Cited by 146 publications

References 47 publications

A comprehensive guide to experimental and predicted thermodynamic properties of phosphate apatite minerals in view of applicative purposes

A comprehensive guide to experimental and predicted thermodynamic properties of phosphate apatite minerals in view of applicative purposes

Habit Change of Monoclinic Hydroxyapatite Crystals Growing from Aqueous Solution in the Presence of Citrate Ions: The Role of 2D Epitaxy

Effects of hydrothermal temperature and time on hydrothermal synthesis of colloidal hydroxyapatite nanorods in the presence of sodium citrate

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