The global demands for landmine abolition become stronger, whereas the development of landmine detection technology progresses slowly. At present, the detection activities are mainly performed by means of a metal detector or a well-trained dog that needs much time and cost. Therefore, a more efficient landmine detection technique is desired. Most landmines contain aromatic nitro compounds, such as 2,4-dinitrotoluene (DNT) and 2,4,6-trinitrotoluene (TNT) as explosive charges; therefore, these substances are clues for landmines. In this study, we tried to detect amount of aromatic nitro compounds high-sensitively using a surface-polarization controlling method that measures electrochemical impedance of an electrode surface where explosive compounds adsorbed. As a result, we could detect the aromatic nitro compounds at detection limits of sub- mu M level and distinguish the aromatic nitro compounds from other aromatic compounds at 100 mu M at least. Furthermore, in order to improve specificity and sensitivity to aromatic nitro compounds, the electrode surface was modified with arenes that makes charge-transfer complex with aromatic nitro compounds. We adopted anthracene as the arene to functionalize the electrode surface. The modified electrode makes it possible to detect the aromatic nitro compounds selectively. This method enables us to develop a sensor for landmine detection. (All rights reserved Elsevier).


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    Title :

    Detection of aromatic nitro compounds with electrode polarization controlling sensor


    Contributors:
    Masunaga, K. (author) / Hayama, K. (author) / Onodera, T. (author) / Hayashi, K. (author) / Miura, N. (author) / Matsumoto, K. (author) / Toko, K. (author)


    Publication date :

    2005


    Size :

    8 Seiten, 26 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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