Synthesis of mono- and few-layered n-type WSe2 from solid state inorganic precursors por Och, M, Anastasiou, K, Leontis, I, Zemignani, GZ, Palczynski, P, Mostaed, A, Sokolikova, MS, Alexeev, EM, Bai, H, Tartakovskii, AI, Lischner, J, Nellist, PD, Russo, S, Mattevi, C