Researchers at the University of Georgia and the Negev's Gurion University in Israel have used DNA molecules to make new diodes. This is considered the world's smallest diode. The researchers said it will promote the development of DNA elements and promote the development of molecular electronics. Diode function is to achieve a one-way current flow. More than 40 years ago, scientists proposed to miniaturize diodes and other electronic components to a single molecule size. This led to the birth of molecular electronics, and molecular electronics research is expected to promote computer technology to break through the limitations of traditional silicon devices.
In this study, scientists used DNA molecules to make diodes. Breakthroughs in genetic science make it possible to precisely design DNA and make DNA the best raw material for molecular electronics research.
The double helix structure of DNA consists of molecules called base pairs. The new diode is only 11 base pairs long. Typically, the length of each DNA base pair is about 0.34 nanometers.
DNA itself does not function as a diode. However, when the researchers inserted two small Coralyne molecules into a location inside the DNA and applied 1.1 volts to it, it was found that the current through the DNA diode was 15 times stronger in one direction than the other.
Scientists said the DNA diode can be further optimized to develop molecular devices that provide real functionality. The research results published in the latest "Journal of Natural Chemistry".
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