Every research and develop-ment in biosensors (as well as in any other research fields) is started from a state-of-the-art review. Such review is one of the most labor- and time-consuming parts of research. The open access Book Series titled ÔAdvances in Biosensors: ReviewsÕ is intended to help researchers to find appropriate references, to read it and make a critical analysis to determine what was done well before and what was not solved till now and formulate the future scientific aims and objectives. We hope that readers enjoy this book and that can be a valuable tool for those who are involved in research and development different biosensors.