DNA scaffolds can self-assemble into single-electron devices without the need for cryogenic environments
According to the report of the Institute of Electrical and Electronics Engineers' "Spectrum" magazine official website recently, Finnish researchers found that DNA (DNA) scaffolds can self-assemble into a fixed model without requiring a low-temperature environment, and that nanoparticles can be incorporated into functional structures. , Integrated single electronic device. Relevant results were published in the recent "Nanocom" magazine. DNA scaffolding is an important part of nanobiology. In addition to the genetic properties of a gene, a DNA molecule is also a compact one-dimensional nanowire. The combination of DNA and nanomaterials can bring unprecedented advantages to the life sciences, materials science, and environmental sciences.
Self-assembly of DNA scaffolds into single-electron devices
Now researchers at the Nanoscience Center at the University of Jyverskyl in Finland and the Center for Biomedical Technology at the University of Tampere use DNA scaffolds to assemble three gold nanoparticles into a single-electron transistor. DNA scaffolds have previously been used to organize gold nanoparticles into patterns, but this work shows for the first time that DNA scaffolds can be used to construct precise, controlled, fully electronically-characterized single-electron nanodevices that eliminate the need for them. It can also work normally at low temperatures.
Electronic transmission in a single electronic device is completely different than in conventional electronic devices. For a single electronic device, electrons are controlled by quantum mechanics. In these devices, there is an "island" containing electrons, which is controlled by a "tunneling junction" that controls the tunneling of electrons. The tunnel junction operates under the quantum mechanical phenomenon known as "coulomb blockade." In this phenomenon, electrons inside the device have a strong sense of repulsion and can block other electronic cycles.
Finnish researchers created a single-electron transistor (SET) that can observe the effect of a single electron passing through a tunnel junction or reaching an “island.†An important observation is that there is also a clear Coulomb blockade at room temperature. Although this is not the first time that this phenomenon has been observed at higher temperatures, the important thing is that self-assembling DNA scaffolds can make the production of these devices more scalable.
Finland’s National Security Council member and research team senior researcher Zhu Xi Taupoli said in an interview with the “Spectral†magazine: “This kind of device based on DNA self-assembly is a huge improvement and can easily be extended to large-scale production. â€
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