Design and Fabrication of Self-assembled Super Nanonetworks of Carbon Nanotube by Self-complimentary DNA

Compelling approach in molecular self-assembly has caused an appropriate bottom-up approach to build and design the systems and patterns with specific performance and capabilities. The aim of the current study was the design and fabrication of self-assembled super nanonetworks of carbon nanotube by self-complementary DNA and its spectroscopic study. In the present experimental study, the sticky oligonucleotide sequence, connected to the amine groups at one end, was connected to the carboxyl groups at the beginning and end of the carbon nanotubes with covalent bond. Then, oligonucleotide connected these systems as interconnected networks. After the preparation of these nanonetworks, their biophysical properties were studied through ultraviolet–visible spectroscopy (UV-vis) and polarimetry and circular dichroism (CD) spectroscopy. Findings: UV-vis specific absorption peak increased and DNA sequences specific peak in CD spectra appeared with DNA sequences bind to carbon nanotubes. After adding the connecting sequences to the constructive units, carbon nanotubes come in the form of a complex network. The formation of network nanostructures made of carbon nanotubes by the base pair of paired oligonucleotide sequences is clearly visible in UV-vis spectra.