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Double-gate nanowire field effect transistor for a biosensor. 2010

Jae-Hyuk Ahn, and Sung-Jin Choi, and Jin-Woo Han, and Tae Jung Park, and Sang Yup Lee, and Yang-Kyu Choi
Department of Electrical Engineering, Center for Systems and Synthetic Biotechnology, and Institute for the BioCentury, Yuseong-gu, Daejeon 305-701, Republic of Korea.

A silicon nanowire field effect transistor (FET) straddled by the double-gate was demonstrated for biosensor application. The separated double-gates, G1 (primary) and G2 (secondary), allow independent voltage control to modulate channel potential. Therefore, the detection sensitivity was enhanced by the use of G2. By applying weakly positive bias to G2, the sensing window was significantly broadened compared to the case of employing G1 only, which is nominally used in conventional nanowire FET-based biosensors. The charge effect arising from biomolecules was also analyzed. Double-gate nanowire FET can pave the way for an electrically working biosensor without a labeling process.

UI MeSH Term Description Entries
D015374 Biosensing Techniques Any of a variety of procedures which use biomolecular probes to measure the presence or concentration of biological molecules, biological structures, microorganisms, etc., by translating a biochemical interaction at the probe surface into a quantifiable physical signal. Bioprobes,Biosensors,Electrodes, Enzyme,Biosensing Technics,Bioprobe,Biosensing Technic,Biosensing Technique,Biosensor,Electrode, Enzyme,Enzyme Electrode,Enzyme Electrodes,Technic, Biosensing,Technics, Biosensing,Technique, Biosensing,Techniques, Biosensing
D053770 Nanowires Nanometer-scale wires made of materials that conduct electricity. They can be coated with molecules such as antibodies that will bind to proteins and other substances. Nanowire

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