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Implementing Silicon Nanoribbon Field-Effect Transistors as Arrays for Multiple Ion Detection

Stoop, Ralph L. and Wipf, Mathias and Mueller, Steffen and Bedner, Kristine and Wright, Iain A. and Martin, Colin J. and Constable, Edwin C. and Fanget, Axel and Schoenenberger, Christian and Calame, Michel. (2016) Implementing Silicon Nanoribbon Field-Effect Transistors as Arrays for Multiple Ion Detection. Biosensors, 6 (2). p. 21.

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Abstract

Ionic gradients play a crucial role in the physiology of the human body, ranging from metabolism in cells to muscle contractions or brain activities. To monitor these ions, inexpensive, label-free chemical sensing devices are needed. Field-effect transistors (FETs) based on silicon (Si) nanowires or nanoribbons (NRs) have a great potential as future biochemical sensors as they allow for the integration in microscopic devices at low production costs. Integrating NRs in dense arrays on a single chip expands the field of applications to implantable electrodes or multifunctional chemical sensing platforms. Ideally, such a platform is capable of detecting numerous species in a complex analyte. Here, we demonstrate the basis for simultaneous sodium and fluoride ion detection with a single sensor chip consisting of arrays of gold-coated SiNR FETs. A microfluidic system with individual channels allows modifying the NR surfaces with self-assembled monolayers of two types of ion receptors sensitive to sodium and fluoride ions. The functionalization procedure results in a differential setup having active fluoride-and sodium-sensitive NRs together with bare gold control NRs on the same chip. Comparing functionalized NRs with control NRs allows the compensation of non-specific contributions from changes in the background electrolyte concentration and reveals the response to the targeted species.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian and Stoop, Ralph and Wipf, Mathias and Müller, Steffen and Bedner, Kristine and Wright, Iain and Martin, Colin and Constable, Edwin Charles and Fanget, Axel and Calame, Michel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:MDPI
ISSN:2079-6374
e-ISSN: 2079-6374
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:15 Feb 2017 09:36
Deposited On:15 Feb 2017 09:36

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