Microfluidic paper-based devices

Microfluidic paper-based analytical devices, so-called μPADs, were presented for the first time by Whitesides and colleagues in 2007. Since then, several research groups have focused on designing, synthesizing, and investigating the role of microfluidic paper-based devices in different applications including biosensors, drug delivery, gene delivery, and so on. In this chapter, we focused on different aspects of them, to provide an applicable perspective as well as review the recent advances in this field.