Formation of electrical interconnects by self-trapping of deoxyribonucleic acid molecules

The formation of electrical interconnection is proposed and realized using thiol-modified 60 base pairs of poly-(dG) and poly-(dC) deoxyribonucleic acid (DNA) molecules by self-trapping method. DNA molecules are synthesized by annealing 60 base pairs of poly-(dG) and poly-(dC) single strands with thiol groups at both 5′ and 3′ ends in deionized water at 97°C Thiol-modified DNA molecules are self-trapping with Au molecules and form a good electrical interconnection between the Au metal electrodes without any external physical force. Transport measurements of a particular sample show resistance values of interconnection of approximately 10MΩ. The self-trapping method by thiol-modified DNA molecules could be a very promising technique for the interconnection of nanometer-scale devices.