A low-cost disposable chemical sensing platform based on discrete components

Themistoklis Prodromakis*, Yan Liu, Chris Toumazou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

A method of fabricating low-cost chemical sensing platforms is presented. The device utilizes a discrete metaloxidesemiconductor field-effect transistor to detect ionic concentrations in electrolytes, with particular emphasis to pH. Measured results indicate a chemical sensitivity of 36.5 mV/pH, while the device exhibits low-leakage currents (in picoamperes) and a drift of 9 mV/h. The proposed technique has a great potential for disposable implementations, while the sensing selectivity of the device can be easily altered, resulting into a versatile platform.

Original languageEnglish
Article number5699339
Pages (from-to)417-419
Number of pages3
JournalIEEE Electron Device Letters
Issue number3
Publication statusPublished - 20 Jan 2011

Keywords / Materials (for Non-textual outputs)

  • Chemical sensor
  • discrete ion-sensitive field-effect transistor (ISFET)
  • extended gate


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