Abstract
Recently, researches in the field of nanoscience and nanotechnology have received much attention. In particular, DNA is expected to be a nanoscale functional material due to the base complementarity or self-assembly characteristics. In the self-assembly process, DNA forms network structures on solid substrate surfaces in the aqueous solution. However, the detailed mechanism of DNA network formation is not fully understood. We investigate the controllability of DNA network structures by applying external electric field on a conductive gold substrate surface. Consequently, DNA networks are well observed on the cathodic surfaces. DNA molecules are densely adsorbed on the surfaces. In addition, the roughness of DNA networks is decreased as their molarity increase. It is successfully demonstrated that the formation of DNA networks is controllable by operating the external electric fields.
