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Inkjet-Printed Sulfide-Selective Electrode.

Roberto Pol¹, Ana Moya^2,3, Gemma Gabriel^2,3

¹Departament of Chemistry, Faculty of Science, Universitat Autònoma de Barcelona , Edifici C-Nord, Carrer dels Til·lers, 08193 Bellaterra (Cerdanyola del Vallès), Barcelona, Spain.

Analytical Chemistry

|October 31, 2017

Summary

Researchers developed the first inkjet-printed sulfide-selective electrode (IPSSE) for low-cost manufacturing. This novel sensor demonstrates rapid, reproducible, and durable performance in environmental samples.

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Hybrid Printing for the Fabrication of Smart Sensors

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Published on: January 31, 2019

Area of Science:

Electrochemistry
Materials Science
Analytical Chemistry

Background:

Inkjet printing offers a cost-effective manufacturing route for electrodes.
A gap exists in the low-cost production of ion-selective electrodes, particularly for sulfide detection.

Purpose of the Study:

To introduce a novel two-step fabrication method for an inkjet-printed sulfide-selective electrode (IPSSE).
To evaluate the performance and applicability of the IPSSE in environmental sample analysis.

Main Methods:

A two-step fabrication process involving printing a silver electrode and subsequent electrochemical deposition of sulfide (Ag/Ag2S).
Potentiometric measurements were used to assess the electrode's performance, including response linearity, time, and stability.
Environmental samples (river/sea-spiked) and bioreactor samples were analyzed and compared with a commercial sensor.

Main Results:

The IPSSE exhibited a Nernstian response (-29.4 ± 0.3 mV·decade-1) over a concentration range of 0.03-50 mM.
A rapid response time of approximately 3 seconds was observed.
The IPSSE showed comparable results to a commercial sensor in environmental samples and demonstrated good reproducibility and durability over 15 days.

Conclusions:

The developed two-step inkjet printing approach provides a viable method for fabricating sulfide-selective electrodes.
This technique offers a new perspective for the mass production of all-solid-state ion-selective electrodes.
The IPSSE is a promising, cost-effective alternative for sulfide monitoring in various applications.