Kamal Ghorui
Synthetic DNA’s incorporation into electronics is changing neuromorphic computing’s methodology and is the new way of addressing the rising energy costs associated with current Artificial Intelligence. Integrating molecularly engineered DNA sequences with quasi-2D perovskite semiconductor materials allows researchers to create ‘memristors,’ or memory resistors, based on the brain’s ability to create new memories through synaptic plasticity. DNA offers a very high density of data at 215 petabytes of information stored per gram; so devices built using DNA hybridisation and synthesised using ultra-low voltage, less than 0.1 volts, have both processing capability and memory on the same device. Using both process and memory on the same device achieves a substantial (i.e., 100 times) decrease in energy usage, creating a strong, scalable model for next-generation energy-efficient, high-capacity supercomputers.
DNA powering the next generation of supercomputers
Standard computing is approaching a ‘thermodynamic limit’, and synthetic DNA will be an answer to that as a programmable nanomaterial. According to a journal published in Wiley Online Library, when silver ions are doped with synthetic DNA and in conjunction with perovskite, the resulting Synthetic DNA (i.e. DNA) creates a stable conductive pathway for high-density storage. These devices are memristors, which can retain memory (data) just like neurons do in biological systems, without needing continuous power.
Why DNA is the key to sustainable computing
With the continued expansion of artificial intelligence, the energy necessary to move data on standard chips will become too great. Studies funded by the National Science Foundation (NSF) are demonstrating that biological systems have an advantage over contemporary chip architectures when it comes to parallel processing. Computing with DNA-Enhanced Processing (i.e. DNA-based computers) will enable multiple input processing with 90 per cent less energy overhead than conventional non-volatile memory.
DNA’s massive density advantage
One of the largest advantages of DNA is its spatial efficiency. As cited in NIH studies, DNA has the potential to store data at a density that is several million times greater than silicon. This will have tremendous implications for future supercomputers as the physical footprint of data centres decreases while, at the same time, the reliability of lengthy (cold) data storage increases via the chemical stability of synthetic DNA strands.
Bioelectronics built to withstand 121 degrees Celsius extremes
Bioelectronics face performance limits due to fragility; however, research recently announced that a composite of synthetic DNA and perovskites could endure extreme temperatures of 121 degrees Celsius (250 degrees Fahrenheit) and therefore enable the design of DNA-powered electronics that will withstand the thermal demands of high-performance supercomputers, thereby allowing for their potential to provide an alternative to the current semiconductor industry.
