V.  Srinivasan, Vernekar, D., Jaiswal, G., Jagadeesan, D., and Ramamurthy, S. Sathish, ?Earth abundant iron-rich N-doped graphene based spacer and cavity materials for surface plasmon-coupled emission enhancements?, ACS Applied Materials & Interfaces, vol. 8, no. 19, pp. 12324-12329, 2016.