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• Preparation of a thin layer of tantalum coating on an alkali hot surface using magnetron sputtering. • The prepared tantalum coatings retained the hierarchical mesh porous structure of alkali heat surface. • Alkaline thermal and tantalum composite coating increases both biocompatibility and antimicrobial properties of SLA implants. In order to achieve both antibacterial and biological activity on the SLA (sandblasted large-grit acid-etched) surface, this study utilized alkali treatment and magnetron sputtering to create a layer of AT + Ta (alkali treatment and tantalum) composite coating on the SLA surface to enhance biocompatibility and antibacterial properties. The AT + Ta coating successfully maintained the hierarchical porous structure of alkali treatment while also improving antibacterial properties. The physical and chemical properties, antibacterial properties, and biocompatibility of the AT + Ta coating were systematically investigated. The results suggest that AT + Ta coating could be an effective approach for enhancing the surface properties of SLA implant. [ABSTRACT FROM AUTHOR]

Abstract: TiAlN/SiO2 nanomultilayers with different SiO2 layer thickness were synthesized by reactive magnetron sputtering. The microstructure and mechanical properties were investigated by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and nano-indentation. The results indicated that, under the template effect of B1-NaCl structural TiAlN layers, amorphous SiO2 was forced to crystallize and grew epitaxially with TiAlN layers when SiO2 layer thickness was below 0.6nm, resulting in the enhancement of hardness and elastic modulus. The maximum hardness and elastic modulus could respectively reach 37GPa and 393GPa when SiO2 layer thickness was 0.6nm. As SiO2 layer thickness further increased, SiO2 transformed back into amorphous state and broken the coherent growth of nanomultilayers, leading to the decrease of hardness and elastic modulus. [Copyright &y& Elsevier]

Bi 2 S 3 -nanorods charged reduced graphene oxide (RGO) was prepared by an one-pot self-assembly method. The morphologies and structures of the samples were characterized by X-ray powder diffraction and transmission electron microscopy. The as-synthesized composite showed good crystallinity and one-dimensional nanostructures uniformly dispersed on the surface of nanorods with the diameter of 80–140 nm. Combining advantages of RGO and Bi 2 S 3 , the Bi 2 S 3 /RGO composite exhibited superior electrochemical performance to bare Bi 2 S 3 . The higher discharge/charge specific capacity, better rate capability and cycling stability were achieved for graphene-backboned hybrid architectures. [ABSTRACT FROM AUTHOR]