A research team at Penn State University has created a novel memory device by fusing synthetic DNA with a perovskite semiconductor, resulting in a system that operates with substantially less power than conventional storage. This bio-hybrid memristor, detailed in Advanced Functional Materials and subject to a patent application, represents a step toward more energy-efficient computing and artificial intelligence applications. The device consumes approximately 100 times less power than traditional flash drives and offers higher storage capacity.
The core of this development lies in its ability to combine the dense information storage capabilities of DNA with the electronic properties of perovskite. DNA, the fundamental genetic material in living organisms, can store about 215 million gigabytes of data per gram. Harnessing this natural storage density in electronic devices could lead to more efficient data centers and faster processing of complex information.
The Penn State team addressed the challenge of integrating biological DNA with electronic materials. Their approach uses synthetic DNA, which consists of chemically engineered molecules arranged into short genetic sequences. These sequences are customized for specific electronic requirements. The other key component is crystalline perovskite, a semiconductor employed in technologies such as solar cells and lasers.
Kavya S. Keremane, a co-corresponding author and postdoctoral researcher in materials science and engineering at Penn State, stated that bridging the domains of biology and electronics necessitated a new materials platform for their seamless function. The combination of DNA's storage and perovskite's electronic properties formed a bio-hybrid system that alters how low-power memory devices can be designed.
To construct the device, the researchers incorporated silver nanoparticles into a layer of customized DNA sequences. This layer was then integrated with thin films of perovskite. This technique, known as "doping," involves introducing a small amount of another material to achieve specific properties. The silver-treated DNA and perovskite form conductive channels that efficiently guide electrical current through the device.
The memristor operates at less than 0.1 volt, a significant reduction compared to the 120 volts from a standard US outlet. This low voltage enables electrons to move reliably through the system. The device performs memory functions comparable to existing technologies but uses only one-tenth of the power. This efficiency makes it suitable for energy-conscious electronics.
The device also demonstrated consistent operation at temperatures up to nearly 121 degrees Celsius and remained stable at room temperature for over six weeks. This performance surpasses that of current perovskite-based memory devices. Keremane noted that neither DNA nor perovskite alone produced results as robust as their combination. This synergy enables high memory storage density with minimal power consumption.
Bed Poudel, a researcher involved in the project, highlighted that DNA is nature's most efficient storage mechanism. He suggested that integrating DNA into electronics offers a glimpse into future possibilities. The researchers have filed a patent application for their work and plan to refine their approach. They also intend to investigate other bio-inspired electronic applications. This development could facilitate more efficient data centers, faster data processing, and systems capable of handling increasingly complex information, particularly in the context of neuromorphic computing for AI.