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  • Title: Ultra-sensitive detection of bacterial toxin with silicon nanowire transistor.
    Author: Mishra NN, Maki WC, Cameron E, Nelson R, Winterrowd P, Rastogi SK, Filanoski B, Maki GK.
    Journal: Lab Chip; 2008 Jun; 8(6):868-71. PubMed ID: 18497904.
    Abstract:
    Nanowire field effect transistors (nano-FET) were lithographically fabricated using 50 nm doped polysilicon nanowires attached to two small gold terminals separated from each other by a approximately 150 nm gap to serve as the basis for electronic detection of bacteria toxins. The device characterizations, semiconducting properties and use in a robust and sensitive bio-molecular detection sensor of bacterial toxins were reported in this work. The device characteristics were demonstrated with varying gate and drain voltages. The bio-molecular detection was demonstrated using electrochemical impedance spectroscopy (EIS), using Staphylococcus aureus Enterotoxin B (SEB) as the target molecule. The detection limit of SEB was observed in the range of 10-35 fM.
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