Use of nanomaterials for impedimetric DNA sensors: A review |
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Authors: | A Bonanni [Author Vitae] M del Valle [Author Vitae] |
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Institution: | a Sensors and Biosensors Group, Chemistry Department, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain b International Center for Materials Nanoarchitectonics (MANA)/Biomaterials Center, National Institute for Material Science (NIMS), 1-1 Namiki, Tsukuba (Ibaraki), Japan |
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Abstract: | This review presents the state of the art of DNA sensors (or genosensors) that utilize electrochemical impedance spectroscopy as the transduction technique. As issue of current interest, it is centered on the use of nanomaterials to develop or to improve performance of these specific biosensors. It will describe the different principles that may be employed in the measuring step and the different formats adopted for detection of a DNA sequence or confirmation or amplification of the finally obtained signal. The use of nanomaterials for the above listed aspects, viz. the use of carbon nanotubes or other nanoscopic elements in the construction of the electrodes, or the use of nanoparticles, mainly gold or quantum dots, for signal enhancement will be fully revised. |
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Keywords: | Biosensor Genosensor Carbon nanotube Gold nanoparticles Quantum dots Electrochemical impedance spectroscopy |
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