A1 Refereed original research article in a scientific journal

Low-cost reduced graphene oxide-based conductometric nitrogen dioxide-sensitive sensor on paper




AuthorsHassinen J, Kauppila J, Leiro J, Määttänen A, Ihalainen P, Peltonen J, Lukkari J

PublisherSPRINGER HEIDELBERG

Publication year2013

JournalAnalytical and Bioanalytical Chemistry

Journal name in sourceANALYTICAL AND BIOANALYTICAL CHEMISTRY

Journal acronymANAL BIOANAL CHEM

Number in series11

Volume405

Issue11

First page 3611

Last page3617

Number of pages7

ISSN1618-2642

DOIhttps://doi.org/10.1007/s00216-013-6805-5(external)

Web address http://dx.doi.org/10.1007/s00216-013-6805-5(external)


Abstract
The fabrication concept for a low-cost sensor device using reduced graphene oxide (rGO) as the sensing material on a porous paper substrate is presented. The sensors were characterized using conductivity and capacitance measurements, atomic force microscopy and X-ray photoelectron spectroscopy. The effects of different reducing agents, graphene oxide (GO) flake size and film thickness were studied. The sensor was sensitive to NO2, and devices based on a thin (10-nm) hydrazine-reduced GO layer had the best sensitivity, reaching a 70 % reduction in resistance after 10 min of exposure to 10 ppm NO2. The sensitivity was high enough for the detection of sub-parts per million levels of NO2. Desorption of gas molecules, i.e. the recovery of the sensor, could be accelerated by UV irradiation. The structure and preparation of the sensor are simple and up-scalable, allowing their fabrication in bulk quantities, and the fabrication concept can be applied to other materials, too.



Last updated on 2024-26-11 at 18:24