Antimicrobial Nanoparticle Applications in Biomedical Sciences

Antimicrobial nanoparticles represent a versatile class of materials engineered at the nanometre scale to combat infectious agents through mechanisms that differ from conventional antibiotics. Metallic and metal‐oxide nanoparticles—including silver, gold, copper, zinc and iron oxides—exert bactericidal effects via multiple pathways: generation of reactive oxygen species, disruption of microbial membranes, release of metal ions and interference with intracellular processes. Surface functionalisation, size control and shape tuning allow optimisation of efficacy and minimise undesirable host toxicity. These nanostructures can be incorporated into wound dressings, implant coatings, tissue‐engineering scaffolds and drug‐delivery systems, offering targeted antimicrobial action, reduced biofilm formation and synergy with existing antibiotics. The global rise of multidrug‐resistant pathogens has heightened interest in nanoparticle strategies, as they can overcome resistance mechanisms while preserving mammalian cell viability when properly designed. Current research focuses on improving selectivity, understanding long‐term biocompatibility and establishing standardised metrics for safety and efficacy. As the field matures, translational studies are elucidating how engineered nanoparticle platforms can be integrated into clinical practice to prevent and treat device‐associated infections, support tissue regeneration and reduce dependence on traditional antimicrobial agents.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Antimicrobial Nanoparticle Applications in Biomedical Sciences publication trend

The graph below shows the total number of articles in antimicrobial nanoparticle applications in biomedical sciences across all publications each year (not limited to Nature Index journals).

Technical terms

Nanoparticle: A discrete particle with at least one dimension between 1 and 100 nanometres, often exhibiting unique physicochemical properties.

Reactive oxygen species (ROS): Highly reactive molecules derived from oxygen that can damage cellular components and induce microbial cell death.

Biofilm: A structured community of microorganisms encased in a self-produced polymeric matrix adherent to surfaces.

Minimum inhibitory concentration (MIC): The lowest concentration of an antimicrobial agent required to prevent visible growth of a microorganism in vitro.

Biocompatibility: The ability of a material to perform with an appropriate host response in a specific application without causing adverse effects.

References

1. A potential strategy against clinical carbapenem-resistant Enterobacteriaceae: antimicrobial activity study of sweetener-decorated gold nanoparticles in vitro and in vivo. Journal of Nanobiotechnology (2023).
2. Metal nanoparticles: understanding the mechanisms behind antibacterial activity. Journal of Nanobiotechnology (2017).
3. Antibacterial approaches in tissue engineering using metal ions and nanoparticles: From mechanisms to applications. Bioactive Materials (2021).
4. Size- and Shape-Dependent Antibacterial Studies of Silver Nanoparticles Synthesized by Wet Chemical Routes. Nanomaterials (2016).
5. The Effect of Charge at the Surface of Silver Nanoparticles on Antimicrobial Activity against Gram‐Positive and Gram‐Negative Bacteria: A Preliminary Study. Journal of Nanomaterials (2015).
6. Recent Advances in Metal Decorated Nanomaterials and Their Various Biological Applications: A Review. Frontiers in Chemistry (2020).