期刊
MACROMOLECULAR BIOSCIENCE
卷 3, 期 10, 页码 591-595出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mabi.200350027
关键词
biomaterials; dielectric properties; nanolayers; polysaccharides; sensors
Chitosan is alternated with sulfonated polystyrene (PSS) to build layer-by-layer (LBL) films that are used as sensing units in an electronic tongue. Using impedance spectroscopy as the principle method of detection, an array using chitosan/PSS LBL film and a bare gold electrode as the sensing units was capable of distinguishing the basic tastes - salty, sweet, bitter, and sour - to a concentration below the human threshold. The suitability of chitosan as a sensing material was confirmed by using this sensor to distinguish red wines according to their vintage, vineyard, and brands.
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