Obtaining and Characterizing Thin Layers of Magnesium Doped Hydroxyapatite by Dip Coating Procedure

Daniela Predoi (1) , Simona Liliana Iconaru (1) , Mihai Valentin Predoi (2) , Mikael Motelica-Heino (3, 4) , Nicolas Buton (5) , Christelle Megier (5)

1 National Institute of Physics of Materials
2 UPB - University Politehnica of Bucharest [Romania]
3 ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327
4 Biogéosystèmes Continentaux - UMR7327
5 HORIBA Jobin Yvon S.A.S

A simple dip coating procedure was used to prepare the magnesium doped hydroxyapatite coatings. An adapted co-precipitation method was used in order to obtain a Ca 25−x Mg x (PO 4) 6 (OH) 2 , 25MgHAp (x Mg = 0.25) suspension for preparing the coatings. The stabilities of 25MgHAp suspensions were evaluated using ultrasound measurements, zeta potential (ZP), and dynamic light scattering (DLS). Using transmission electron microscopy (TEM) and scanning electron microscopy (SEM) information at nanometric resolution regarding the shape and distribution of the 25MgHAp particles in suspension was obtained. The surfaces of obtained layers were evaluated using SEM and atomic force microscopy (AFM) analysis. The antimicrobial evaluation of 25MgHAp suspensions and coatings on various bacterial strains and fungus were realized. The present study presents important results regarding the physico-chemical and antimicrobial studies of the magnesium doped hydroxyapatite suspensions, as well as the coatings. The studies have shown that magnesium doped hydroxyapatite suspensions prepared with x Mg = 0.25 presented a good stability and relevant antimicrobial properties. The coatings made using 25MgHAp suspension were homogeneous and showed remarkable antimicrobial properties. Also, it was observed that the layer realized has antimicrobial properties very close to those of the suspension. Both samples of the 25MgHAp suspensions and coatings have very good biocompatible properties.

Keywords: antimicrobial activity; dip coating procedure; cell viability; magnesium; hydroxyapatite; ultrasound measurement

Domains: Material chemistry

Daniela Predoi, Simona Liliana Iconaru, Mihai Valentin Predoi, Mikael Motelica-Heino, Nicolas Buton, et al.. Obtaining and Characterizing Thin Layers of Magnesium Doped Hydroxyapatite by Dip Coating Procedure. Coatings, 2020, 10 (6), pp.510. ⟨10.3390/coatings10060510⟩. ⟨insu-02744782⟩