SilverDGallium Nano-Amalgamated Particles as a Novel, Biocompatible Solution for Antibacterial Coatings

Bacterial infections account for countless deaths globally. Antibiotics are the primary countermeasure; however, the alarming spread of antibiotic-resistant strains necessitates alternative solutions. Silver and silver compounds have emerged as promising antibacterial agents. However, issues related to cytotoxicity and genotoxicity of silver remain concern. To overcome these challenges, this proposes an easy-to-control and straightforward method to synthesize novel Silvergallium (AgGa) nano-amalgamated particles. Gallium liquid metal (GaLM) is used to facilitate the galvanic deposition of silver nanocrystals (Ag) on oxide layer. The GaLM not only serves as a carrier for silver through the galvanic replacement process, but also provides a controlled-release mechanism for silver, in this way improving biocompatibility, reducing inflammation, and stimulating bone growth. Notably, AgGa suspensions can be conveniently deposited by spray-coating on a range of devices and material surfaces, effectively eliminating pathogenic bacteria with efficacy comparable to that of silver ions. In vivo studies in rat models affirm the antibacterial capabilities, especially against methicillin-resistant Staphylococcus aureus and Escherichia coli, when placed on implants such as titanium rods and magnesium discs. Furthermore, AgGa promotes bone matrix formation and collagen growth without eliciting an inflammatory response, indicating a major promise for coatings on a wide variety of biomedical devices and materials. Facing rising antibiotic resistance, new antibacterial solutions are urgently needed. This study introduces a simple method to create Silvergallium (AgGa) nano-amalgamated particles using gallium liquid metal (GaLM) as a substrate. This dual-function approach makes GaLM a stable carrier for silver nanocrystals and a slow-release mechanism for silver ions, improving biocompatibility, reducing inflammation, and aiding bone regeneration. This addresses limitations like cytotoxicity, paving the way for broader applications in combating bacterial infections.image