Low-cost chemical sensing platform with organic polymer functionalization

Matti Kaisti; Aapo Knuutila; Zhanna Boeva; Carita Kvarnström; Kalle Levon

doi:10.1109/LED.2015.2445371

Low-cost chemical sensing platform with organic polymer functionalization

Matti Kaisti, Aapo Knuutila, Zhanna Boeva, Carita Kvarnström, Kalle Levon

Laboratory of Molecular Science and Engineering

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

12 Citations (Scopus)

Abstract

The characteristics of an inexpensive transistor-based chemical sensing platforms with organic polymer, polyaniline (PANI), was investigated in terms of tranconductance, pH sensitivity, and drift properties. The platform consists of a printed circuit board manufactured in a standard manufacturing process and commercial discrete MOSFETs. The platform is funtionalized with PANI by a simple low-cost drop casting. The platform shows low average pH sensitivity of 9.1 mV/pH in the range 4–7 where physiological recognition events take place and as such is a promising candidate for intrinsic charge-based biosensing since PANI is able to directly interact with charged macromolecules such as proteins and DNA. In addition, the PANI functionalized sensors show low nonmonotonic drift and only slightly reduced transconductance compared with the MOSFET counterpart.

Original language	Undefined/Unknown
Pages (from-to)	844–846
Journal	IEEE Electron Device Letters
Volume	36
Issue number	8
DOIs	https://doi.org/10.1109/LED.2015.2445371
Publication status	Published - 2015
MoE publication type	A1 Journal article-refereed

Access to Document

10.1109/LED.2015.2445371

http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7123611

Cite this

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title = "Low-cost chemical sensing platform with organic polymer functionalization",

abstract = "The characteristics of an inexpensive transistor-based chemical sensing platforms with organic polymer, polyaniline (PANI), was investigated in terms of tranconductance, pH sensitivity, and drift properties. The platform consists of a printed circuit board manufactured in a standard manufacturing process and commercial discrete MOSFETs. The platform is funtionalized with PANI by a simple low-cost drop casting. The platform shows low average pH sensitivity of 9.1 mV/pH in the range 4–7 where physiological recognition events take place and as such is a promising candidate for intrinsic charge-based biosensing since PANI is able to directly interact with charged macromolecules such as proteins and DNA. In addition, the PANI functionalized sensors show low nonmonotonic drift and only slightly reduced transconductance compared with the MOSFET counterpart.",

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AU - Boeva, Zhanna

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AU - Levon, Kalle

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