Self-assembled nanotube field-effect transistors for label-free protein biosensors

P Hu, A Fasoli, J Park, Y Choi, Pedro Estrela, S L Maeng, W I Milne, A C Ferrari

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A self-assembly method is developed to fabricate single-wall carbon nanotube field-effect transistors (SWNT-FETs). The electrode surface and the area between electrodes are modified with nonpolar groups (-CH3) and polar groups (-NH3+). SWNTs are selectively placed in the area between the electrodes. We achieve stability and specificity in label-free protein detection using the biotin-streptavidin pair as research model. Our process holds promise for high integration of SWNT-FET biosensors, with no need for high-temperature processing. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2988274]
Original languageEnglish
Article number074310
JournalJournal of Applied Physics
Issue number7
Publication statusPublished - 2008


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