Electrochemical Assessment of DNA-based Nanosensors

In recent years, the development of electrochemical DNA-based nanosensors has garnered significant attention due to their potential applications in various fields, including environmental monitoring, clinical diagnostics, and food safety. This chapter offers a comprehensive overview of the principles, advancements, and applications of electrochemical DNA-based nanosensors. The Introduction delves into the significance of DNA in the realm of life sciences, highlighting its pivotal role in various domains following the Human Genome Project. It emphasizes the growing importance of DNA biosensors and the advantages offered by electrochemical methods, particularly in terms of cost-effectiveness and compatibility with microelectronic devices. Furthermore, the integration of nanotechnology into biosensors has revolutionized DNA detection, offering enhanced sensitivity and precision. Nanosensors, with their minute size and specific interaction capabilities with biological molecules, hold immense potential for rapid and insightful DNA analysis. The chapter elucidates the advantages of nanosensors, including their ability to detect trace amounts of genetic material and facilitate real-time monitoring, making them invaluable tools in fields such as environmental monitoring and medical diagnostics. The chapter also discusses the principles underlying electrochemical DNA-based nanosensors, detailing the process of signal transduction and the affinity-based detection mechanism. It highlights the role of nanostructures in bridging the gap between the converter and bioreceptor, enhancing sensor sensitivity and performance. Moreover, the chapter provides insights into structural advancements and types of electrochemical DNA sensors, including potentiometric biosensors. It emphasizes the diverse applications of these sensors, ranging from enzyme catalysis to conductometric and amperometric measurements, showcasing their versatility in detecting biological reactions.