Department of Materials and Interfaces, Weizmann Institute, Rehovot 76100, Israel.
Department of Chemical Research Support, Weizmann Institute, Rehovot 76100, Israel.
Int J Mol Sci. 2018 Feb 26;19(3):657. doi: 10.3390/ijms19030657.
Films combining hydroxyapatite (HA) with minute amounts (ca. 1 weight %) of (rhenium doped) fullerene-like MoS₂ (IF) nanoparticles were deposited onto porous titanium substrate through electrophoretic process (EPD). The films were analyzed by scanning electron microscopy (SEM), X-ray diffraction and Raman spectroscopy. The SEM analysis showed relatively uniform coatings of the HA + IF on the titanium substrate. Chemical composition analysis using energy dispersive X-ray spectroscopy (EDS) of the coatings revealed the presence of calcium phosphate minerals like hydroxyapatite, as a majority phase. Tribological tests were undertaken showing that the IF nanoparticles endow the HA film very low friction and wear characteristics. Such films could be of interest for various medical technologies. Means for improving the adhesion of the film to the underlying substrate and its fracture toughness, without compromising its biocompatibility are discussed at the end.
通过电泳沉积（EPD）工艺，将羟基磷灰石（HA）与微量（约 1 重量%）（掺铼）类富勒烯 MoS₂（IF）纳米粒子复合的薄膜沉积到多孔钛基底上。通过扫描电子显微镜（SEM）、X 射线衍射和拉曼光谱对薄膜进行了分析。SEM 分析表明，HA+IF 在钛基底上形成了相对均匀的涂层。使用能谱仪（EDS）对涂层进行的化学成分分析表明，存在羟基磷灰石等磷酸钙矿物质，是主要相。摩擦学测试表明，IF 纳米粒子赋予了 HA 薄膜极低的摩擦和磨损特性。此类薄膜可能在各种医疗技术中具有应用价值。最后讨论了在不影响其生物相容性的前提下，提高薄膜与基底附着力和断裂韧性的方法。
