A. Berrier, P. Offermans, R. Cools, B. van Megen, W. Knoben, G. Vecchi, J. Gómez Rivas, M. Crego-Calama and S. Brongersma, Enhancing the gas sensitivity of surface plasmon resonance with a nanoporous silica matrix, Sens. Actuators B 160, 181-188 (2011)
