Nanoparticle Synthesis and Characterization for Antibacterial Applications
Summary
Nanoparticles, typically defined as particles between 1 and 100 nm in at least one dimension, have emerged as potent antibacterial agents through mechanisms such as membrane disruption, generation of reactive oxygen species and ion release. Synthesis methods span chemical, physical and biological (green) approaches, each offering distinct control over particle size, shape, surface chemistry and crystallinity, which in turn govern antibacterial efficacy. Characterization techniques—ranging from X-ray diffraction (XRD) and electron microscopy to spectroscopic methods—are essential to elucidate structural and compositional attributes that influence microbial interactions. Recent efforts have focused on eco-friendly routes to produce metal and metal-oxide nanoparticles, tailoring surface functionalisation to enhance selectivity against pathogens while minimising cytotoxicity. Advances in in vitro and ex vivo assays now enable more precise determination of minimum inhibitory concentrations (MICs) across diverse bacterial strains, and growing interest in synergistic formulations combines nanoparticles with conventional antibiotics to overcome resistance. The global significance of this work is underscored by the urgent need for novel antimicrobials and the potential for practical applications in medical coatings, wound dressings, water disinfection and food packaging.
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Nanoparticle Synthesis and Characterization for Antibacterial Applications publication trend
The graph below shows the total number of articles in nanoparticle synthesis and characterization for antibacterial applications across all publications each year (not limited to Nature Index journals).
Technical terms
Nanoparticle: Particle with dimensions between 1 and 100 nm exhibiting unique chemical and physical properties due to a high surface-to-volume ratio.
Green synthesis: Environmentally benign method using biological agents, such as plant extracts, for reduction and stabilisation of nanoparticles.
Minimum inhibitory concentration (MIC): Lowest concentration of an antimicrobial agent that prevents visible growth of a bacterial population.
Scanning electron microscopy (SEM): Imaging technique employing a focused electron beam to visualise surface morphology at nanometre resolution.
X-ray diffraction (XRD): Analytical method to determine crystalline structure and phase composition of materials via diffraction of X-rays.
Fourier-transform infrared spectroscopy (FTIR): Technique measuring molecular vibrations to identify functional groups present on nanoparticle surfaces.
References
- Green synthesis of silver oxide nanoparticles: Eco-friendly approach for sustainable solutions. Industrial Crops and Products (2025).
- A Review on Synthesis and Characterization of Ag2O Nanoparticles for Photocatalytic Applications. Journal of Chemistry (2020).
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