Fukasawa, Y., K. Takanabe, A. Shimojima, M. Antonietti, K. Domen and T. Okubo: Synthesis of Ordered Porous Graphitic-C
3N
4 and Regularly Arranged Ta
3N
5 Nanoparticles by Using Self-Assembled Silica Nanospheres as a Primary Template. In: Chemistry-an Asian Journal
6, 1, 103-109 (2011).