Biosensing platform on a flexible substrate

Sahil Shah, Joseph Smith, John Stowell, Jennifer Blain Christen

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The work presents implementing a low cost pH sensing system for biological applications in a flexible electronics process. As a part of the system the work describes an ion sensitive field effect transistor, using indium tin oxide (ITO) as a sensing layer and gold as a reference electrode, on a flexible substrate. The devices presented here are designed and fabricated using the thin film transistor (TFT) display technology at the Arizona State University Flexible Electronics and Display Center. It was observed that ITO has a sensitivity of 50 mV/pH. The work also discusses the variability in these devices and signal processing that could be used to calibrate them. Toward this end, a readout circuit designed in a 0.5 μm CMOS process is presented to interface with the sensors.

Original languageEnglish (US)
Pages (from-to)197-203
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume210
DOIs
StatePublished - 2015

Fingerprint

Flexible electronics
Tin oxides
Indium
platforms
Ion sensitive field effect transistors
Flexible displays
indium oxides
tin oxides
Substrates
Thin film transistors
Gold
Signal processing
Display devices
electronics
Electrodes
readout
Networks (circuits)
signal processing
CMOS
Sensors

Keywords

  • CMOS
  • ISFET
  • ITO
  • Microfluidic
  • PEN

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Instrumentation

Cite this

Biosensing platform on a flexible substrate. / Shah, Sahil; Smith, Joseph; Stowell, John; Blain Christen, Jennifer.

In: Sensors and Actuators, B: Chemical, Vol. 210, 2015, p. 197-203.

Research output: Contribution to journalArticle

Shah, Sahil ; Smith, Joseph ; Stowell, John ; Blain Christen, Jennifer. / Biosensing platform on a flexible substrate. In: Sensors and Actuators, B: Chemical. 2015 ; Vol. 210. pp. 197-203.
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