DNA-Based Memory Device Achieves Ultra-Low Power Consumption

Scientists have developed a memory device that uses synthetic deoxyribonucleic acid (DNA) and consumes one hundred times less power than traditional storage. This bio-hybrid technology could enhance artificial intelligence (AI) systems and future computing. The device combines synthetic DNA with a semiconductor material called crystalline perovskite.

Researchers at Penn State created a memory resistor, or memristor, using these materials. Memristors can store and process information in the same location, similar to how neurons function in the brain. This capability supports more complex data processing. The team published their findings in *Advanced Functional Materials*.

The synthetic DNA is made from commercially available, chemically engineered molecules. These are arranged into short genetic sequences. The perovskite is a semiconductor used in solar cells and other devices. Integrating these two components was a key challenge. The researchers overcame this by developing a new materials platform.

To construct the device, silver nanoparticles were added to the customized DNA sequences. This technique, called doping, allows the DNA to conduct electricity. It also helps align the molecular units. Unlike natural DNA, synthetic DNA can be precisely arranged. This allows for greater control at small scales.

The combined silver-doped DNA and perovskite formed bio-hybrid pathways. These pathways directed electrical current through the device. The device operated reliably at less than 0.1 volt. It also maintained functionality at temperatures up to 250 degrees Fahrenheit. It remained functional at room temperature for over six weeks. This exceeds the performance of existing perovskite-based memory devices. The new system performs memory functions while using significantly less power.