Electrolyte Jet Machining (EJM) has been performed on stainless steel surfaces with the aim of reducing bacterial retention through the generation of nanoscale surface morphology. Following initial EJM experiments aimed at investigating the influence of machining depth, machining speed and current density on the resulting surface roughness, three characteristic surfaces were produced with a current density of 10–18 A/cm² and a machining speed of 0.8–8 mm/s to obtain an arithmetic mean height (S_a) of 0.5–0.74 μm and a density of peaks (S_pd) of 0.25–1.26 μm⁻¹. Relatively large differences between the three surfaces in terms of S_pd allowed thorough investigation into the effects of surface feature size on bacterial retention to be performed. Reductions in the order of 90% compared to control samples were achieved for gram-positive Bacillus cereus and Staphylococcus aureus across the entire tested parameter range (S_pd = 0.25–1.26 μm⁻¹), while reductions in the order of 99% were achieved for gram-negative Escherichia coli and Pseudomonas aeruginosa for surfaces characterized by S_pd > 1 μm⁻¹. Not only do the results call attention to EJM as an innovative technology for producing antibacterial surfaces, they also highlight important differences in the behavior of gram-positive and gram-negative bacteria in relation to EJM-textured surfaces with nanoscale surface morphology.

电解喷射加工（EJM）已在不锈钢表面上进行，目的是通过产生纳米级表面形态来减少细菌残留。在最初的EJM实验旨在调查加工深度，加工速度和电流密度对所得表面粗糙度的影响之后，生产出三个特征表面，电流密度为10–18 A / cm ²，加工速度为0.8–8 mm / s以获得0.5-0.74μm的算术平均高度（S _a）和0.25-1.26μm ^-1的峰密度（S _pd）。就S _pd而言，三个表面之间的相对较大差异允许彻底调查表面特征尺寸对细菌保留的影响。在整个测试参数范围内（S _pd  = 0.25–1.26μm ^-1），革兰氏阳性蜡样芽孢杆菌和金黄色葡萄球菌与对照样品相比减少了90％，而减少了99％革兰氏阴性大肠杆菌和铜绿假单胞菌适用于特征在于S _pd  > 1μm ^- 1的表面。结果不仅引起人们对EJM的关注，它是一种用于生产抗菌表面的创新技术，它们还突出了革兰氏阳性细菌和革兰氏阴性细菌的行为与具有纳米级表面形态的EJM纹理化表面有关的重要差异。