A low-cost paper-based inkjet-printed platform for electrochemical analyses

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Anni Määttänen, Ulriika Vanamo, Petri Ihalainen, Petri Pulkkinen, Heikki Tenhu, Johan Bobacka, Jouko Peltonen
Publisher: ELSEVIER SCIENCE SA
Publication year: 2013
Journal: Sensors and Actuators B: Chemical
Journal acronym: SENSOR ACTUAT B-CHEM
Volume number: 177
Start page: 153
End page: 162
Number of pages: 10
ISSN: 0925-4005
eISSN: 1873-3077


Abstract

An electrode platform printed on a recyclable low-cost paper substrate was characterized using cyclic voltammetry. The working and counter electrodes were directly printed gold-stripes, while the reference electrode was a printed silver stripe onto which an AgCl layer was deposited electrochemically. The novel paper-based chips showed comparable performance to conventional electrochemical cells. Different types of electrode modifications were carried out to demonstrate that the printed electrodes behave similarly with conventional electrodes. Firstly, a self-assembled monolayer (SAM) of alkanethiols was successfully formed on the Au electrode surface. As a consequence, the peak currents were suppressed and no longer showed clear increase as a function of the scan rate. Such modified electrodes have potential in various sensor applications when terminally substituted thiols are used. Secondly, a polyaniline film was electropolymerized on the working electrode by cyclic voltammetry and used for potentiometric pH sensing. The calibration curve showed close to Nerstian response. Thirdly, a poly(3,4-ethylenedioxythiophene) (PEDOT) layer was electropolymerized both by galvanostatic and cyclic potential sweep method on the working electrode using two different dopants; Cl- to study ion-to-electron transduction on paper-Au/PEDOT system and glucose oxidase in order to fabricate a glucose biosensor. The planar paper-based electrochemical cell is a user-friendly platform that functions with low sample volume and allows the sample to be applied and changed by e.g. pipetting. Low unit cost is achieved with mask- and mesh-free inkjet-printing technology.


Keywords

Cyclic voltammetry, Electrochemical biosensor, Gold electrode, Inkjet printing, Low-cost paper chip

Last updated on 2019-15-10 at 02:53