Single-Atom Nanozymes in Analytical Chemistry: Opportunities and Challenges

Single-atom nanozymes (SANs) represent a groundbreaking innovation in analytical chemistry, offering a new paradigm for molecular detection and environmental sensing. Due to their unique atomic-level dispersion, SANs exhibit superior catalytic activity and specificity, making them ideal candidates for a wide range of applications, including disease biomarker detection and environmental monitoring. This article explores the potential of SANs in molecular diagnostics, highlighting their use in biosensors for ultrasensitive detection of proteins, nucleic acids, and metabolites. Their integration into fluorescence-based and electrochemical sensors has enabled rapid, accurate, and label-free detection, crucial for point-of-care testing. SANs also show promise in environmental monitoring, where they have been utilized for detecting pollutants such as heavy metals, pesticides, and CO₂. Additionally, their role in miniaturized analytical devices, such as lab-on-a-chip systems, showcases their compatibility with portable diagnostic tools, ensuring quick and reliable analysis in real-world settings. Still, challenges such as fabrication complexity, stability under various environmental conditions, and high material costs remain barriers to widespread adoption. The article also discusses the integration of SANs with advanced data analytics, such as machine learning and artificial intelligence, to enhance sensor performance. Despite these challenges, the transformative potential of SANs in analytical chemistry promises significant advances in both molecular detection and environmental sensing.