proposes the investigation of a new stable S = 1/2 Tetrazolinyl Radical. It was evaporated under ultra-high vacuum (UHV), forming nanoneedles keeping the substrate at room temperature. The nanoneedles' UHVand air-stability were further investigated by using XPS. The nanoneedle morphology is very interesting for nanoelectronics applications because of device miniaturization and the favorable ratio between surface and bulk, beneficial for various devices such as sensors and transistors. To our knowledge, among adequately characterized thin films of radicals, only the tris(2,4,6-trichlorophenyl)methyl radical shows a mixed morphology, with the coexistent presence of islands and fibers when grown on graphene. Conversely, the tetrazolinyl radical shows a distinct nanoneedle selfassembled morphology under the present preparation conditions. This morphology was also the starting point for a new work that is presently submitted (Achieving Chemical Recognition, Recycling, and Circularity with Radical Nanostructures, by A. Das, E. M. Nowik-Boltyk, T. Junghoefer, E. Nadler, F. Gity, P. K. Hurley, z. Yang, A. Rajca, F. Tavanti, A. Calzolari, M. B. Casu). This work focuses on the growth of novel three-dimensional (3D) magnetic nanostructures using an innovative approach that emphasizes recycling and circular economy principles. The production and investigation of 3D magnetic nanostructures represent a significant advancement in both fundamental research and practical applications, with immense potential for next-generation technologies, as also explicitly discussed in the "2025 Roadmap on 3D Nano-magnetism" by Gubbiotti (J. Phys.: