Elena Tatarova, Ana Dias, Plamen Dankov, Jivko Kissovski, Ana Maria Botelho do Rego, Neli Bundaleska, Edgar Felizardo, Miroslav Abrashev, Ana Maria Ferraria, Thomas Strunskus, Vasyl Shvalya, Neelakandan M Santhosh, Ivan Valeriev Ivanov, Martin Košiček, Janez Zavašnik, Luis Lemos Alves, Bruno Gonçalves, Uroš Cvelbar
Materials with tunable negative electromagnetic performance, i.e., where dielectric permittivity becomes negative, have long been pursued in materials research due to their peculiar electromagnetic (EM) characteristics. Here, this promising feature is reported in materials on the case of plasma-synthesized nitrogen-doped graphene sheets with tunable permittivity over a wide (1-40 GHz) frequency range. Selectively incorporated nitrogen atoms in a graphene scaffold tailor the electronic structure in a way that provides an ultra-low energy (0...
March 27, 2024: Small