Bennett, A., Gaudin, O., Williams, Oliver Aneurin  ORCID: https://orcid.org/0000-0002-7210-3004, Foord, J. S. and Jackman, R. B.
2007.
Diamond based ion-sensitive field effect transistors for cellular biosensing.
Presented at: 2006 MRS Fall Meeting,
Boston, MA, USA,
27 November - 1 December 2006.
Symposium J – Diamond Electronics—Fundamentals to Applications.
MRS Proceedings
(956)
Cambridge:
Cambridge University Press,
pp. 221-227.
10.1557/PROC-0956-J16-03
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Abstract
The use of a chemically inert and essentially biocompatible material for cellular biosensing is an attractive idea. In this context we have studied the operation of diamond-based ion-sensitive field effect transistors (ISFETs) within solutions of varying pH, and alkali-halide concentrations. In particular, we report the use of an inexpensive diamond substrate material, often referred to as ‘black’ diamond. pH sensitivity was observed when devices based on hydrogen-terminated p-type surfaces where employed, provide some surface oxidation was performed prior to their use. Variation in the threshold voltage for ISFET operation of the order of 20mV/pH unit was determined. In terms of operation in potassium iodide solution, we have shown that the device is shows selective sensitivity to the iodide species, despite the equi-molar presence of both K+ and I- species. The origin of this selectivity is discussed.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Subjects: | Q Science > QC Physics |
| Uncontrolled Keywords: | diamond; devices; sensor |
| Publisher: | Cambridge University Press |
| Last Modified: | 21 Oct 2022 08:43 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/34169 |
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