Dante, Roberto C. Chamorro-Posada, Pedro Vázquez-Cabo, José Rubiños-López, Óscar Sánchez-Árevalo, Francisco M. Huerta, Lázaro Martín-Ramos, Pablo Lartundo-Rojas, Luis Ávila-Vega, Carlos F. Rivera-Tapia, Edgar D. Fajardo-Pruna, Cristian A. Ávila-Vega, Álvaro J. Solorza-Feria, Omar Nitrogen-carbon graphite-like semiconductor synthesized from uric acid Carbon 10.1016/j.carbon.2017.05.098 2017 2017