A sensitive landmine detection method with easy operation is demanded, however, sensors satisfied both sensitivity and ease have not been developed yet. The purpose of this study is to develop the high-sensitive chemical sensor that can easily and quickly identify the explosive molecules leaking from landmines. It is conceivable that such technology could be applied to a sensor for security. In this paper, we describe a sensor using a surface polarization controlling method. We improved specificity and sensitivity to aromatic nitro compounds by introducing the modified electrode with Lewis base that has the charge-transfer interaction with aromatic nitro compounds. Furthermore, the modified electrode could be characterized with fluorescence spectroscopy.