10. Problems and Perspectives: Catalytic Versus Affinity Biosensing, Sensitivity, Selectivity and Specificity, Reproducibility, Calibration and Uncertainty, Regeneration, Signal Enhancement

This chapter delves into the critical aspects of biosensing technologies, focusing on catalytic and affinity-based methods. It explores the challenges and advancements in sensitivity, selectivity, and specificity, emphasizing the importance of reproducibility, calibration, and signal enhancement. The text discusses the use of enzymes and antibodies as biorecognition elements, highlighting their advantages and limitations. It also covers the integration of advanced materials like bionanomaterials to enhance sensor performance. The chapter concludes with a discussion on the future prospects of biosensing technologies, including the development of versatile sensing platforms and the potential for real-time, in situ monitoring. Readers will gain insights into the current state and future directions of biosensing, making it a valuable resource for professionals in the field.