Futuristic Circuits Concept

DNA Origami Permits Fabricating Superconducting Nanowires for Nanoelectronic Circuits of the Future


Futuristic Circuits Concept

Fabricating nanoelectronic circuits of the long run simply received much more attention-grabbing, because of DNA origami.

The search for ever-smaller digital parts led a world group of researchers to discover utilizing molecular constructing blocks to create them. DNA is ready to self-assemble into arbitrary constructions, however the problem with utilizing these constructions for nanoelectronic circuits is the DNA strands should be transformed into extremely conductive wires.

Impressed by earlier works utilizing the DNA molecule as a template for superconducting nanowires, the group took benefit of a latest bioengineering advance often called DNA origami to fold DNA into arbitrary shapes.

In AIP Advances, from AIP Publishing, researchers from Bar-Ilan College, Ludwig-Maximilians-Universität München, Columbia College, and Brookhaven Nationwide Laboratory describe exploit DNA origami as a platform to construct superconducting nanoarchitectures. The constructions they constructed are addressable with nanometric precision that can be utilized as a template for 3D architectures that aren’t potential right this moment by way of standard fabrication strategies.

DNA Origami Wires

Utilizing DNA origami as a platform to construct superconducting nanoarchitectures. Transmission electron microscopy (TEM) picture of DNA origami wires earlier than the coating. Credit score: Lior Shani, Philip Tinnefeld, Yafit Fleger, Amos Sharoni, Boris Shapiro, Avner Shaulov, Oleg Gang, and Yosef Yeshurun

The group’s fabrication course of entails a multidisciplinary method, particularly the conversion of the DNA origami nanostructures into superconducting parts. And the preparation technique of DNA origami nanostructures entails two main parts: a round single-strand DNA because the scaffold, and a mixture of complementary brief strands performing as staples that decide the form of the construction.

“In our case, the construction is an roughly 220-nanometer-long and 15-nanometer-wide DNA origami wire,” stated Lior Shani, of Bar-Ilan College in Israel. “We dropcast the DNA nanowires onto a substrate with a channel and coat them with superconducting niobium nitride. Then we droop the nanowires over the channel to isolate them from the substrate in the course of the electrical measurements.”

The group’s work reveals exploit the DNA origami approach to manufacture superconducting parts that may be included into a variety of architectures.

Niobium Nitrate-Coated DNA Nanowire

Utilizing DNA origami as a platform to construct superconducting nanoarchitectures. (left) Schematic illustration of a niobium nitrate-coated DNA nanowire suspended above a silicon nitride/silicon oxide channel. (proper) Excessive-resolution scanning electron microscope (HR-SEM) picture of the channel (black in picture) on which the DNA nanowire is suspended. Within the picture, the channel seems discontinuous, reflecting the DNA suspended throughout it (marked by dashed orange rectangle). The space between the 2 sides of the channel is ~50 nanometers, and the width of the niobium nitrate-coated nanowire at its narrowest level is ~25 nanometers. Credit score: Lior Shani, Philip Tinnefeld, Yafit Fleger, Amos Sharoni, Boris Shapiro, Avner Shaulov, Oleg Gang, and Yosef Yeshurun

“Superconductors are recognized for working an electrical present move with out dissipations,” stated Shani. “However superconducting wires with nanometric dimensions give rise to quantum fluctuations that destroy the superconducting state, which leads to the looks of resistance at low temperatures.”

By utilizing a excessive magnetic area, the group suppressed these fluctuations and decreased about 90% of the resistance.

“Which means our work can be utilized in purposes like interconnects for nanoelectronics and novel units primarily based on exploitation of the pliability of DNA origami in fabrication of 3D superconducting architectures, comparable to 3D magnetometers,” stated Shani.

Reference: “DNA origami primarily based superconducting nanowires” by Lior Shani, Philip Tinnefeld, Yafit Fleger, Amos Sharoni, Boris Ya. Shapiro, Avner Shaulov, Oleg Gang and Yosef Yeshurun, 19 January 2021, AIP Advances.
DOI: 10.1063/5.0029781





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