Specially designed polyaniline/polypyrrole ink for a fully printed highly sensitive pH microsensor
Other authors
Publication date
2021-07-06ISSN
1944-8252
Abstract
pH sensing for healthcare applications requires sensors with mechanically stable materials of high sensitivity and high reproducibility combined with low-cost fabrication technologies. This work proposes a fully printed pH sensor based on a specially formulated conducting polymer deposited on a microelectrode in a flexible substrate. A formulation, which combined polyaniline (PANI) and polypyrrole (PPy) with integrated polyelectrolyte poly(sodium 4-styrenesulfonate) (PSS), was specially prepared to be printed by inkjet printing (IJP). The sensor has good sensitivity in the physiological region (pH 7–7.5) key for the healthcare biosensor. This mixture printed over a commercial gold ink, which has a singular chemical functionalization with phthalocyanine (Pc), increased the sensor sensitivity, showing an excellent reproducibility with a linear super-Nernstian response (81.2 ± 0.5 mV/pH unit) in a wide pH range (pH 3–10). This new ink together with the IJP low-cost technique opens new opportunities for pH sensing in the healthcare field with a single device, which is disposable, highly sensitive, and stable in the whole pH range.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
61 - Medical sciences
Keywords
Pages
12 p.
Publisher
American Chemical Society
Is part of
ACS Applied Materials & Interfaces
Grant agreement number
info:eu-repo/grantAgreement/MINECO/FEDER/PN I+D/RTI2018-096786-B-I00
info:eu-repo/grantAgreement/MINECO/FEDER/PN I+D/RTI2018-102070-B-C21
info:eu-repo/grantAgreement/SUR del DEC/SGR/2017-SGR-988
info:eu-repo/grantAgreement/SUR del DEC/SGR/2017-SGR-1559
This item appears in the following Collection(s)
Rights
© L'autor/a
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/