Recent advances in self-assembled DNA nanosensors

Over the past 30 years DNA has been assembled into a plethora of structures by design, based on its reliable base pairing properties. As a result, many applications of DNA nanotechnology are emerging. Here, we review recent advances in the use of self-assembled DNA nanostructures as sensors. In particular, we focus on how defined nanostructures, such as rigid DNA tetrahedra, provide an advantage over traditional nanosensors consisting of arrays of single-stranded DNA. We also explore advances in DNA origami that have resulted in consistent detection of single molecules.