Abstract
Surface functionalization can be utilized as a useful tool to improve the antibacterial performances of medical devices. Furthermore, some antibacterial agents are coated or impregnated on the surface of 316LSS to prevent contamination of bacteria. Here, CuO-Cu2O coatings were prepared on 316L nanoporous stainless steel (NPSS) by anodization-assisted electrodeposition for applications in antibacterial materials. The present study investigated influences of HClO4 concentration, reaction temperature, and load voltage on the morphology, structure, and composition of the coatings. SEM images showed that appropriate nanopores with an average size of about 93 nm were formed on the stainless steel surface and then were successfully filled with CuO-Cu2O. The nanopore size increased with increasing application of electrolyte concentration. Both the diameter and depth of the nanopores increased with increasing voltage. The EDX result indicated that Cu and O were embedded in as-prepared CuO-Cu2O/NPSS. XRD analysis showed that the CuO-Cu2O/NPSS surface comprised CuO and Cu2O.
Highlights
Stainless steel (SS) with low-cost, high mechanical strength and corrosion resistance, biocompatibility, good electrical conductivity, and commercial availability has attracted much attention due to its potential applications in industrial and biomedical materials [1, 2]
An appropriate nanoporous structure with a mean diameter of 93 nm was obtained on the SS surface by the following conditions: 5 vol% electrolyte HClO4 solution; 50 V load voltage; 600 s reaction time; reaction with uniform magnetic stirring
Appropriate CuO-Cu2O/nanoporous SS (NPSS) was obtained by the following conditions: 0.1 M Cu(CH3COO)2·H2O + 0.1 M CH3COONa solution and 60°C deposition temperature
Summary
Stainless steel (SS) with low-cost, high mechanical strength and corrosion resistance, biocompatibility, good electrical conductivity, and commercial availability has attracted much attention due to its potential applications in industrial and biomedical materials [1, 2]. Several researchers have investigated the modification of the SS surface with nanostructures and incorporated catalysts, such as oxide metals and noble metals, to improve its catalytic properties [3,4,5]. Metal-based nanoporous materials with large specific surface areas, high porosity, and versatile porous structure can significantly improve utilization of surface active sites and promote chemical reactions, such as potential applications in catalysis [8,9,10]
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