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Label-Free FimH Protein Interaction Analysis Using Silicon Nanoribbon BioFETs

Wipf, Mathias and Stoop, Ralph L. and Navarra, Giulio and Rabbani, Said and Ernst, Beat and Bedner, Kristine and Schonenberger, Christian and Calame, Michel. (2016) Label-Free FimH Protein Interaction Analysis Using Silicon Nanoribbon BioFETs. ACS Sensors, 1 (6). pp. 781-788.

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Official URL: http://edoc.unibas.ch/52356/

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Abstract

The detection of biomarkers at very low concentration and low cost is increasingly important for clinical diagnosis. Moreover, monitoring affinities for receptor-antagonist interactions by time-resolved measurements is crucial for drug discovery and development. Biosensors based on ion-sensitive field-effect transistors (BioFETs) are promising candidates for being integrated into CMOS structures and cost-effective production. The detection of DNA and proteins with silicon nanowires has been successfully demonstrated using high affinity systems such as the biotin-streptavidin interaction. Here, we show the time-resolved label-free detection of the interaction of the bacterial FimH lectin with an immobilized mannose ligand on gold-coated silicon nanoribbon BioFETs. By comparing our results with a commercial state of the art surface plasmon resonance system, additional surface effects become visible when using this charge based detection method. Furthermore, we demonstrate the effect of sensor area on signal-to-noise ratio and estimate the theoretical limit of detection.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Sch├Ânenberger)
UniBasel Contributors:Sch├Ânenberger, Christian and Wipf, Mathias and Stoop, Ralph and Navarra, Giulio and Rabbani, Said and Ernst, Beat and Bedner, Kristine and Calame, Michel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
e-ISSN:2379-3694
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:28 Nov 2017 11:20
Deposited On:15 Feb 2017 09:40

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