Fabrication of Logic Circuits Based on DNA Origami

Carbon nanotubes (CNTs) have exceptional electrical properties that suggest their use in nanoelectronics and other fields. CNTs have been used to build a variety of electronic devices and circuits, such as carbon nanotube field-effect transistors, logic gates, and so on. The single-walled carbon nanotubes (SWCNTs) have fabricated electronic devices by many methods in the past; however, the arrangement of individual SWCNT into complex nanoscale geometries is still an open challenge. Herein, we propose a method of assemble the SWCNTs on DNA origami template to build the circuits. The DNA origami technique, which is based on the folding of long single-stranded DNA (so-called scaffold strand) with the help of hundreds of short oligonucleotides (so-called staple strands), opened new routes to relatively simple and fast fabrication of a predetermined shape. In the paper, we use this method to construct logic circuits—AND gate and OR gate.