Controlling DNA Spacing in a Monolayer, Using DNA Nano-Cubes

DNA SAMs have received a lot of research interest recently as a suitable platform for modern biosensors. However, there are some shortcomings that remain to be addressed, such as uneven coverage of monolayer, or the spacing between the DNA strands that is hard to control. Here, we present DNA nanostructured cubes as an improved platform for DNA SAM based sensors. The DNA nano-cubes allow for a precise control of ssDNA spacing on the surface and have a great functionalization possibility. We have modified the nanostructures to include thiolated surface anchor and a fluorescence reporter. Cubes were deposited gold electrode via Au-S bonds and analyzed, using AFM and in-situ fluorescence microscopy.