Figure 5From: A nanoporous interferometric micro-sensor for biomedical detection of volatile sulphur compounds Fabry-Perot interference response to sulphide gas. (a, b) Fabry-Perot interference spectrum before and after exposure to hydrogen sulphide gas obtained from gold-coated porous alumina (Au-AAO) showing a shift of fringe pattern. (c) The gas concentration dependence graph.Back to article page