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Since even low concentrations of toxic heavy metals can seriously damage human health, it is important to develop simple, sensitive and accurate methods for their detection. Graphene, which is extremely sensitive to foreign species, is a key element in the development of a sensing platform where low concentrations of analyte have to be detected. This work discusses the proof of concept of a sensing platform for liquid-phase detection of heavy metals (e.g. Pb) based on epitaxial graphene sensors grown on Si-face 4H-SiC substrate (EG/SiC). The sensing platform developed includes a microfluidic chip incorporating all the features needed to connect and execute the Lab-on-chip (LOC) functions using 3D printing fast prototyping technology. Herein, we present the response of EG to concentrations of Pb2+ solutions ranging from 125 nM to 500 μM, showing good stability and reproducibility over time and an …
Publication date: 
1 Jun 2019

MF Santangelo, Ivan Shtepliuk, Daniel Filippini, Ivan Gueorguiev Ivanov, Rositsa Yakimova, Jens Eriksson

Biblio References: 
Volume: 288 Pages: 425-431
Sensors and Actuators B: Chemical