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Hydroxyapatite (HA), Ca5(PO4)3(OH), is a bioceramic well-known in the biomaterial
field. Through the last decades, efforts have been particularly developed in the
synthesis of nanostructured hydroxyapatite and in the control of its properties, mainly
to increase its specific surface area. In order to achieve that, surfactants acting as
template during synthesis represent a promising research field. However, no study
depicts clearly the behaviour of surfactants in the conditions of HA synthesis, as well
as the effect of surfactant concentration on the structure of hydroxyapatite.
The goal of this work is to study the behaviour of a cationic surfactant, cetrimonium
bromide (CTAB), in conditions of HA synthesis (pH 10.5 and presence of phosphate
ions) and to perform HA synthesis with CTAB. To achieve that, different CTAB
concentrations ranging from 0.4 to 100 mmol/L were analysed through Dynamic light
scattering (DLS) at temperatures of 25 and 50 °C. Results showed that temperature
does not impact significantly the CTAB micelles behaviour. Moreover, CTAB forms
aggregates at concentrations lower than 10 mmol/L. These aggregates tend to
disappear when CTAB concentration increases and unimodal size micelles are
formed.
HA syntheses were performed using appropriate CTAB concentrations determined by
means of DLS results. After synthesis, HA powders have been characterized by
FT-IR, TGA, XRD, BET and TEM techniques and have been compared to
commercialized HA powder. It is observed that surface area can be undoubtedly
increased (up to 150 m²/g) by the use of CTAB surfactant. Moreover, morphology
and size of HA particles are impacted by CTAB concentrations.
These results are promising and show the importance of surfactant behaviour's
comprehension in HA synthesis. This opens new perspectives in the biomaterials
domains and especially in bone reconstruction.

hydroxyapatite --- CTAB --- DLS --- wet method --- Ingénierie, informatique & technologie > Multidisciplinaire, généralités & autres

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This Special Issue of Nanomaterials collects a series of original research articles providing new insight into the application of computational quantum physics and chemistry in research on nanomaterials. It illustrates the extension and diversity of the field and indicates some future directions. It provides the reader with an overall view of the latest prospects in this fast evolving and cross-disciplinary field

Research & information: general --- BTF --- TATB --- CL-20 --- cocrystal --- energetic materials --- shock sensitivity --- large-scale ab initio molecular dynamics simulations --- AlN --- low-dimensional material --- atomic cluster --- electronic structure --- HSE06 hybrid functional --- CsPbBr3 --- CsPb2Br5 --- solvent polarity --- CTAB --- phase transition --- high-entropy alloys --- generalized stacking fault energy --- first-principles --- interfacial energy --- surface energy --- nanoparticles --- gold --- ab initio --- molecular mechanics --- fcc Ni --- tilt Σ5(210) grain boundary --- vacancy --- Si and Al impurity --- grain boundary energy --- segregation energy --- defects binding energies --- magnetism --- ferroelectricity --- SnTe --- nanoribbon --- nanoflakes --- critical size --- density-functional theory --- thermodynamics --- silver --- decahedron --- excess energy --- ab initio calculations --- dye-sensitized solar cells --- azobenzene --- density functional theory --- topological insulators --- magnetic doping --- defects --- environment and health --- first-principles physics --- DFT --- hazardous gas --- BTF --- TATB --- CL-20 --- cocrystal --- energetic materials --- shock sensitivity --- large-scale ab initio molecular dynamics simulations --- AlN --- low-dimensional material --- atomic cluster --- electronic structure --- HSE06 hybrid functional --- CsPbBr3 --- CsPb2Br5 --- solvent polarity --- CTAB --- phase transition --- high-entropy alloys --- generalized stacking fault energy --- first-principles --- interfacial energy --- surface energy --- nanoparticles --- gold --- ab initio --- molecular mechanics --- fcc Ni --- tilt Σ5(210) grain boundary --- vacancy --- Si and Al impurity --- grain boundary energy --- segregation energy --- defects binding energies --- magnetism --- ferroelectricity --- SnTe --- nanoribbon --- nanoflakes --- critical size --- density-functional theory --- thermodynamics --- silver --- decahedron --- excess energy --- ab initio calculations --- dye-sensitized solar cells --- azobenzene --- density functional theory --- topological insulators --- magnetic doping --- defects --- environment and health --- first-principles physics --- DFT --- hazardous gas

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This Special Issue of Nanomaterials collects a series of original research articles providing new insight into the application of computational quantum physics and chemistry in research on nanomaterials. It illustrates the extension and diversity of the field and indicates some future directions. It provides the reader with an overall view of the latest prospects in this fast evolving and cross-disciplinary field

BTF --- TATB --- CL-20 --- cocrystal --- energetic materials --- shock sensitivity --- large-scale ab initio molecular dynamics simulations --- AlN --- low-dimensional material --- atomic cluster --- electronic structure --- HSE06 hybrid functional --- CsPbBr3 --- CsPb2Br5 --- solvent polarity --- CTAB --- phase transition --- high-entropy alloys --- generalized stacking fault energy --- first-principles --- interfacial energy --- surface energy --- nanoparticles --- gold --- ab initio --- molecular mechanics --- fcc Ni --- tilt Σ5(210) grain boundary --- vacancy --- Si and Al impurity --- grain boundary energy --- segregation energy --- defects binding energies --- magnetism --- ferroelectricity --- SnTe --- nanoribbon --- nanoflakes --- critical size --- density-functional theory --- thermodynamics --- silver --- decahedron --- excess energy --- ab initio calculations --- dye-sensitized solar cells --- azobenzene --- density functional theory --- topological insulators --- magnetic doping --- defects --- environment and health --- first-principles physics --- DFT --- hazardous gas --- n/a