The use of DNAzymes as biosensors merges the fields of chemical sciences and biology. DNAzymes have significantly impacted biosensors in recent years in diverse areas, demonstrating unique properties with potentially wide-ranging applications such as detecting metals to theranostic applications. Even though gold standard analytical methods are available to detect metals or microorganisms in the environment, they involve time-consuming, complicated sample pre-treatment and expensive instruments. As an alternative, DNAzymes have demonstrated a non-destructive rapid analysis technique with...