Biosensing platform on a flexible substrate

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

doi:10.1016/j.snb.2014.12.075

Biosensing platform on a flexible substrate

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

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

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 language	English (US)
Pages (from-to)	197-203
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	210
DOIs	https://doi.org/10.1016/j.snb.2014.12.075
State	Published - Apr 2015

Keywords

CMOS
ISFET
ITO
Microfluidic
PEN

ASJC Scopus subject areas

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

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10.1016/j.snb.2014.12.075

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title = "Biosensing platform on a flexible substrate",

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.",

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AU - Smith, Joseph

AU - Stowell, John

AU - Blain Christen, Jennifer

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AB - 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.

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KW - Microfluidic

KW - PEN

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Biosensing platform on a flexible substrate

Abstract

Keywords

ASJC Scopus subject areas

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