Abstract
A biological and chemical sensor with a rapid response has been required for monitoring our health conditions and the purity of tap water for personal use. We have succeeded in the selective detection of multi-inorganic ions simultaneously using an ion-exchange fiber film. A kind of ion in a solution containing two kinds of cation could be detected by measuring the difference of adsorption force to the film. Moreover, we have succeeded in simultaneous sensing with concentrations as low as 10-5 mol/l using double layered films of cation and anion. Using the fiber film, we can easily achieve multi-layered structure stack and integration into the sensing devices. There is a high potentiality that the film is applicable to a high-performance device for biological sensing.
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