Nanoparticle-based electrochemical sensing

Abstract

Electrochemical sensing has emerged as a potent technique for detecting and quantifying various analytes due to its inherent sensitivity, simplicity, and potential for miniaturization. Leveraging their distinctive physicochemical properties, nanoparticles have sparked a revolution in electrochemical sensing, enhancing sensing platforms’ sensitivity, selectivity, and stability. This paper presents the background and significance of nanoparticle-based electrochemical sensing, along with the diverse applications of nanoparticles in science and engineering. The fundamental principles of nanoparticles in electrochemical sensing are explored, highlighting their unique advantages in electrocatalysis, charge transfer facilitation, and signal amplification. The applications of various types of nanoparticles in electrochemical sensing are discussed, elucidating the role of nanomaterials in designing advanced conduction strategies such as impedance spectroscopy, cyclic voltammetry, and amperometry.Furthermore, this review delves into the applications of nanoparticle-based electrochemical sensors across domains, including gas detection, environmental monitoring, and the field of biosensors. The practicality of these sensors in real-world scenarios is showcased through case studies, emphasizing their rapid response, high specificity, and potential for multi-analyte detection. The challenges and prospects of this field are also examined. Addressing nanoparticle stability, reproducibility, and scalability issues is crucial for the successful commercial translation of these sensing platforms. In conclusion, this review underscores the transformative impact of nanoparticles on the landscape of electrochemical sensing. Their multifunctionality, coupled with evolving conduction methodologies, promises to develop ultra-sensitive and reliable sensing platforms that contribute to advancements across various application domains. With the continuous evolution of nanoparticle synthesis techniques, electrochemical sensing is poised to achieve new frontiers of sensitivity and specificity.