Harnessing Carbon Dots for Infectious Disease Control: Innovations in Diagnostic and Antimicrobial Strategies

Infectious diseases continue to pose significant global health challenges, compounded by the increasing prevalence of antimicrobial resistance and the urgent need for improved diagnostic technologies. This review examines the emerging role of Carbon Dots (CDs) as innovative tools in both the diagnosis and treatment of infectious diseases. Owing to their distinctive properties, including fluorescence, biocompatibility, and tunability, CDs have demonstrated considerable potential in a variety of applications, ranging from bioimaging and biosensing to antimicrobial therapies. The review provides an in-depth analysis of the synthesis methods and functionalization strategies designed to optimize CDs for medical use, emphasizing their applications in diagnostics such as nucleic acid detection, protein-based platforms, and point-of-care testing. Additionally, it discusses the mechanisms underlying the antimicrobial actions of CDs, including membrane disruption and reactive oxygen species generation, and their efficacy against drug-resistant bacteria, viruses, fungi, and parasites. The review also explores the synergistic potential of CDs in combination therapies, such as enhancing antibiotic efficacy and supporting photodynamic and photothermal treatments. Despite these promising developments, challenges related to scalability, stability, and regulatory approval persist, necessitating further research. The review concludes by outlining future research directions, including the engineering of CDs for enhanced selectivity, the development of scalable production processes, and the integration of CDs with advanced technologies like Artificial Intelligence (AI) to improve diagnostic accuracy. Collectively, these advancements could establish CDs as a pivotal tool in addressing current infectious disease challenges and future pandemics.