Hydrophobic anodized alumina surface with embedded CuO nanoparticles: A study on antibacterial behavior

IF 2.9 Q1 MATERIALS SCIENCE, CERAMICS

Open Ceramics Pub Date : 2025-04-22 DOI:10.1016/j.oceram.2025.100786

M. Piryaee , H.R. Ghadami Karder , M. Khodaei

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Abstract

High-touch surfaces pose a significant risk of nosocomial infections, making the development of antibacterial surfaces crucial for inactivating bacteria. In this study, we engineered a one-pot anodic oxidation process incorporating CuO nanoparticles, resulting in a hierarchical porous microstructure. Energy-dispersive spectroscopy (EDS) confirmed the successful embedding of CuO nanoparticles on the anodized aluminum surface. Since the anodic oxidation of aluminum and CuO nanoparticle embedding occurred simultaneously, precise control over nanoparticle distribution was limited. Following stearic acid modification, the CuO-embedded hydrophobic aluminum surface achieved a water contact angle of 121° The antibacterial assay demonstrated a 68 % reduction in Escherichia coli colonies, for the stearic acid-modified CuO-embedded sample, highlighting the synergistic effect of hydrophobicity and CuO nanoparticles. This study presents a novel strategy for fabricating hydrophobic aluminum surfaces capable of disrupting bacterial colonies effectively. The one-pot, cost-effective approach underscores its suitability for industrial and practical applications.

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包埋纳米CuO的疏水阳极氧化氧化铝表面的抗菌性能研究

高接触表面造成医院感染的重大风险，使得抗菌表面的发展对灭活细菌至关重要。在这项研究中，我们设计了一种单锅阳极氧化工艺，其中加入了CuO纳米颗粒，从而形成了层次化的多孔结构。能谱分析（EDS）证实了CuO纳米颗粒在阳极氧化铝表面的成功包埋。由于铝的阳极氧化和氧化铜纳米颗粒的包埋同时发生，限制了对纳米颗粒分布的精确控制。经过硬脂酸修饰后，包埋CuO的疏水铝表面的水接触角达到121°。抗菌实验表明，硬脂酸修饰的CuO包埋样品的大肠杆菌菌落减少68%，突出了疏水性和CuO纳米颗粒的协同作用。本研究提出了一种新的制造疏水铝表面的策略，能够有效地破坏细菌菌落。一锅，成本效益的方法强调其适合工业和实际应用。

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