Breakthrough in Conductive Ink Technology: Everlasting Copper Printed Without Corrosion

Researchers have unveiled a groundbreaking method to print copper onto any surface without oxidation or corrosion, solving a centuries-old challenge in materials science. The innovation, developed by a team led by University of Maryland professor Shenqiang Ren, Yale University’s Liangbing Hu, and Lawrence Berkeley National Laboratory’s Haimei Zheng, was published in the journal Science on May 14, 2026.

The Science Behind the Breakthrough

The team created a liquid reactive ink capable of printing copper at 150°C, a low-temperature process that prevents degradation. This method addresses two longstanding issues in electronics manufacturing: the instability of printable copper in ambient conditions and its susceptibility to oxidation. The ink’s versatility allows it to adhere to surfaces ranging from paper to complex shapes, as demonstrated by copper traces printed on solar cells, circuit boards, and even miniature replicas of the Testudo statue and Eiffel Tower.

“These printed copper traces act as the ‘wiring’ inside next-generation electronics, produced faster, cheaper, and with less waste,” said Ren. The ink’s stability was further validated by its ability to remain intact after six months of seawater submersion, showcasing its durability in harsh environments.

Implications for Industry and Sustainability

Copper is a critical component in modern technology, powering AI systems, data centers, wireless networks, and renewable energy systems. The new ink could reduce reliance on more expensive metals like silver, lowering costs across industries. By replacing traditional methods such as plating and chemical etching, the technology also promises to cut manufacturing time, expenses, and environmental impact.

“The newly developed ink has the potential to revolutionize the conductive ink industry by enabling the use of copper instead of more expensive metals,” Hu noted. The team has since cofounded NewCopper, a startup aimed at commercializing the invention.

Future Applications and Challenges

The research opens avenues for flexible electronics, lightweight radio frequency systems, and affordable solar and battery technologies. However, scaling production and ensuring long-term reliability in industrial settings remain key challenges. Further studies will focus on optimizing the ink’s performance under varied conditions and expanding its applicability.

This development marks a significant step toward sustainable and cost-effective electronics, with potential ripple effects across global manufacturing and energy sectors.