Researchers from CNR-IOM, University of Milano-Bicocca, University of Trieste and University of Vienna have developed a method to create new materials that combine the extraordinary properties of single metal atoms with the robustness, flexibility, and versatility of graphene.
Co and Ni adatoms diffusing across the substrate surface before being incorporated in the growing edge of the Gr layer. Image from: Science Advances
The method involves the controlled deposition of metal atoms, such as cobalt, during the formation of the graphene layer on a nickel surface. Some of these atoms are incorporated into the carbon network of graphene, creating a material with exceptional properties of robustness, reactivity, and stability even under critical conditions.
This new material can be detached from the substrate while maintaining its original structure and is therefore potentially usable in applications in catalysis, spintronics, and electronic devices.
“This is still a preliminary result, but already very promising, born from an original idea in our laboratory that initially seemed unfeasible”, said researcher Cristina Africh (CNR-IOM) who led the team; while Cristiana Di Valentin (University of Milano Bicocca) added: “We applied this method to trap nickel and cobalt atoms, but our calculations suggest that the use can be extended to other metals for different applications”.
The material reportedly shows exceptional stability, even under critical conditions: “We have shown that this material survives even under critical conditions, including the electrochemical environments used in fuel cells and batteries”, said Jani Kotakoski (University of Vienna).
The success of the research also lies in the combination of different competencies and skills: “The contribution of diverse and complementary skills was crucial to demonstrate the effectiveness of this approach, which is both simple and powerful”, concluded Giovanni Comelli (University of Trieste).