Researchers at Penn State University have created a novel approach to data storage by combining synthetic DNA with crystalline perovskite semiconductors, addressing long-standing challenges in integrating biological materials with electronic systems. The work, published in Advanced Functional Materials, demonstrates how DNA’s exceptional information density—capable of storing approximately 215 million gigabytes per gram—can be harnessed alongside electronic components to create more efficient memory systems.
The team engineered a memory resistor, or memristor, using silver-doped synthetic DNA layers integrated with perovskite thin films. Unlike conventional resistors that lose stored information when power is removed, memristors retain a record of previous electrical activity, allowing information storage and processing to occur in the same location. This architecture mirrors neurological function, potentially enabling more sophisticated simultaneous data processing capabilities. The researchers selected synthetic DNA over natural DNA because its shorter, rigid molecular chains can be arranged with precise control at extremely small scales, whereas natural DNA’s long, entangled structure lacks this manipulability.
The hybrid system demonstrated remarkable performance characteristics. When researchers applied electrical current of less than 0.1 volt—significantly lower than standard utility voltage—electrons moved reliably through the device, and it responded predictably to changes in current direction. The device maintained consistent operation at temperatures near 250 degrees Fahrenheit and remained functional at room temperature for over six weeks, substantially outperforming existing perovskite-based storage technologies. Most notably, the system achieved equivalent memory function to comparable technologies while consuming approximately one-tenth the power.
The researchers emphasized that neither component alone produced comparable results, but their combination created synergistic benefits. The silver-doped DNA enhanced electrical conductivity while organizing molecular units more orderly, while perovskite contributed its established electronic properties. This efficiency improvement addresses anticipated demands from artificial intelligence and neuromorphic computing applications, which require low-power, high-storage capacity systems. The team plans further refinement of the technology and exploration of additional applications in bio-inspired electronics.
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