Journal
NANO LETTERS
Volume 13, Issue 6, Pages 2564-2569Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl400645j
Keywords
Structure ordering; molecular dipole charge; silicon nanowire field-effect transistor; DNA sensor; alcohol sensor
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Funding
- National Science Council [NSC 101-2311-B-027-001-, NSC 101-2627-M-001-003-]
- National Taipei University of Technology
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We argue that the structure ordering of self-assembled probing molecular monolayers is essential for the reliability and sensitivity of nanowire-based field-effect sensors assembled probing molecular monolayers is essential for the because it can promote the efficiency for molecular interactions as well as strengthen the molecular dipole field experienced by the nanowires. In the case of monolayers, we showed that structure ordering could be improved by means of electrical field alignment This technique was then employed to align multilayer complexes for nanowire sensing applications. The sensitivity we achieved for detection of hybridization between 15-base single-strand DNA molecules is 0.1 fM and for alcohol sensors is 0.5 ppm. The reliability was confirmed by repeated tests on chips that contain multiple nanowire sensors.
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