Silver Nanoparticle Dissolution and Antibacterial Applications
Summary
Silver nanoparticles (AgNPs) have garnered global attention for their potent antimicrobial properties, largely driven by their ability to release silver ions (Ag⁺) through oxidative dissolution. This process converts metallic silver at the nanoparticle surface into bioactive Ag⁺ under ambient oxygen and physiological conditions. Key parameters such as particle size, shape and surface chemistry govern the rate of ion release: smaller particles and high-surface‐area morphologies dissolve more rapidly, enhancing bactericidal efficacy. In parallel, the design of metal heterostructures and composite coatings has refined control over dissolution kinetics, enabling rapid onset of activity against both planktonic and biofilm-embedded bacteria while maintaining cytocompatibility. As bacterial resistance to conventional antibiotics intensifies, AgNP‐based materials are finding broad application in wound dressings, implant coatings and water purification. Recent advances have deepened our mechanistic understanding of intracellular silver species, informed the rational tuning of ion release profiles and underscored the importance of coating architecture in sustained antibacterial performance.
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Silver Nanoparticle Dissolution and Antibacterial Applications publication trend
The graph below shows the total number of articles in silver nanoparticle dissolution and antibacterial applications across all publications each year (not limited to Nature Index journals).
Technical terms
Oxidative dissolution: Conversion of metallic silver on nanoparticle surfaces into silver ions under oxidative conditions.
Minimum inhibitory concentration (MIC): Lowest concentration of an antimicrobial agent required to prevent visible bacterial growth.
Specific surface area: Total surface area of nanoparticles per unit mass, influencing rate of ion release.
Physical vapour deposition (PVD): Technique for creating thin films by vapourising a solid material and depositing it onto a substrate.
Heterostructure: Layered assembly of different metals or alloys designed to modulate functional properties such as ion release.
References
- The Origin of the Intracellular Silver in Bacteria: A Comprehensive Study using Targeting Gold–Silver Alloy Nanoparticles. Advanced Healthcare Materials (2023).
- Vapor-Phase-Deposited Ag/Ir and Ag/Au Film Heterostructures for Implant Materials: Cytotoxic, Antibacterial and Histological Studies. International Journal of Molecular Sciences (2024).
- Effect of Silver Nanoparticle Size on Antibacterial Activity. Toxics (2024).
- Antibiofilm activity of nanosilver coatings against Staphylococcus aureus. Journal of Colloid and Interface Science (2021).
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