A carbon nanotube immunosensor for Salmonella
Document Type
Article
Publication Date
12-2011
Abstract
Antibody-functionalized carbon nanotube devices have been suggested for use as bacterial detectors for monitoring of food purity in transit from the farm to the kitchen. Here we report progress towards that goal by demonstrating specific detection of Salmonella in complex nutrient broth solutions using nanotube transistors functionalized with covalently-bound anti-Salmonella antibodies. The small size of the active device region makes them compatible with integration in large-scale arrays. We find that the on-state current of the transistor is sensitive specifically to the Salmonella concentration and saturates at low concentration (<1000 cfu/ml). In contrast, the carrier mobility is affected comparably by Salmonella and other bacteria types, with no sign of saturation even at much larger concentrations (108 cfu/ml).
Recommended Citation
Mitchell B. Lerner, Brett R. Goldsmith, Ronald McMillon, Jennifer Dailey, Shreekumar Pillai, Shree R. Singh, A. T. Charlie Johnson; A carbon nanotube immunosensor for Salmonella. AIP Advances 1 December 2011; 1 (4): 042127. https://doi.org/10.1063/1.3658573 Published by American Institute of Physics [Society Publisher]
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Comments
This research was also supported by funds from the NSF-CREST (HRD-0734232) and NSF-HBCU-UP (HRD-0505872) grants to Alabama State University.