Penn State Researchers Develop DNA-Integrated Electronics for Efficient Data Storage

Penn State University researchers have made significant strides in integrating DNA with electronic materials, developing a novel approach that could revolutionize data storage and processing. Their work, detailed in a study published in Advanced Functional Materials, harnesses synthetic DNA and crystalline perovskite to create a new type of low-power memory device.

DNA, known for its remarkable data storage capabilities—holding about 215 million gigabytes of information per gram—has not functioned well with electronic materials. The research team sought to bridge this gap by creating a bio-hybrid system that utilizes synthetic DNA made from engineered molecules specifically arranged for electronic applications, alongside perovskite, a well-established semiconductor used in solar cells and data storage technologies.

“Biology and electronics are different domains,” said Kavya S. Keremane, co-corresponding author of the study and postdoctoral researcher in materials science and engineering at Penn State. “Bridging these two fields required developing an entirely new materials platform that allows them to function seamlessly together.”

Innovative Memory Device Creation

The team successfully constructed a memory resistor, or “memristor,” that significantly reduces energy consumption compared to conventional resistors. Unlike traditional devices that lose stored information when power is cut, memristors can retain a record of electrical activity, similarly to how neurons process information in the brain. This advancement supports more sophisticated data processing methodologies.

As Bed Poudel, co-corresponding author and research professor of materials science and engineering, explained, the shift towards artificial intelligence (AI) and neuromorphic computing builds the need for low-power, high-storage devices that can process multiple inputs efficiently. “Usually, it takes more power to store more information. Our device, however, consumes 100 times less power and the storage capacity is higher than traditional storage devices, like flash drives,” he stated.

Engineering DNA for Conductivity

The researchers introduced silver nanoparticles into a layer of synthetic DNA sequences, optimizing them for electronic conductivity in conjunction with thin films of perovskite. This technique, known as “doping,” allowed the DNA to not only conduct electricity but also align its molecular units in a precise manner.

Co-author Neela H. Yennawar noted the advantages of synthetic DNA over natural DNA, which typically behaves unpredictably when handled. “These structures can be systematically doped with silver and other ions and engineered to interface seamlessly with perovskites—transforming DNA into a programmable, multifunctional nanomaterials platform,” Yennawar explained.

Performance and Stability

The bio-hybrid pathways formed by the combination of silver-doped DNA and perovskite directed electrical current effectively through the device. The researchers found the device operated reliably at voltages below 0.1 volts and maintained performance stability at temperatures nearing 250 degrees Fahrenheit for over six weeks.

They reported that this new memory system performs comparably to existing technologies while consuming only a fraction of the power. “Using just DNA or just perovskite alone did not produce near as robust a result as the combination,” Keremane emphasized. “It’s this combination that enables a very high memory storage density that requires very little power.”

Future Directions

The team plans to further enhance their technology and explore additional applications for bio-inspired electronic systems. “Nature has the solution—we just have to find it and apply it,” Poudel stated, expressing optimism for future developments in integrating biology with electronics.

The research included contributions from co-authors Luyao Zheng, Haodong Wu, Jiamao Zheng, Shashank Priya, and Chiranth C. Ravi at Penn State, along with Rashmi Jha and Abhinav Gorthy from the University of Minnesota. The study was supported by the U.S. National Science Foundation and the National Institutes of Health.