Fabrication and temperature-dependent electrical characterization of a C-shape nanowire patterned by a DNA origami
Türkan Bayrak (Technische Universität Dresden)
A. Martinez Reyes (Universidad Nacional Autónoma de México, TU Delft - Organisation & Governance)
David Daniel Ruiz Arce (Universidad Nacional Autónoma de México)
Enrique C. Samano (Universidad Nacional Autónoma de México)
Artur Erbe (Technische Universität Dresden)
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Abstract
We introduce a method based on directed molecular self-assembly to manufacture and electrically characterise C-shape gold nanowires which clearly deviate from typical linear shape due to the design of the template guiding the assembly. To this end, gold nanoparticles are arranged in the desired shape on a DNA-origami template and enhanced to form a continuous wire through electroless deposition. C-shape nanowires with a size below 150nm on a SiO 2/ Si substrate are contacted with gold electrodes by means of electron beam lithography. Charge transport measurements of the nanowires show hopping, thermionic and tunneling transports at different temperatures in the 4.2K to 293K range. The different transport mechanisms indicate that the C-shape nanowires consist of metallic segments which are weakly coupled along the wires.