Self-assembled graphene and copper nanoparticles composite sensor for nitrate determination

Li Wang, Jungyoon Kim, Tianhong Cui

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


A new sensor based on decorated copper nanoparticles and self-assembled graphene was fabricated and exemplified with the determination of nitrate solutions. Traditionally, graphene is coated on the sensor by drop-casting, leading to poor adhesion between graphene and the sensor. The self-assembled graphene proposed in this paper not only have a firm connection with the substrate, but also provide a three-dimensional network structure for copper nanoparticles. Copper was found as an effective catalyst for nitrate reduction. The combination of copper nanoparticles and self-assembled graphene can greatly enhance the sensitivity. Thus, low detection limit of 7.89 µM is obtained for nitrate, which to our knowledge, is among the lowest reported in the literatures. This method was employed for the determination of nitrate in lake water and the results were in good agreement with those obtained from a standard analytical procedure.

Original languageEnglish (US)
Pages (from-to)3623-3630
Number of pages8
JournalMicrosystem Technologies
Issue number9
StatePublished - Sep 1 2018

Bibliographical note

Funding Information:
Acknowledgements One of the authors acknowledges the support from China Scholarship Council. The devices are fabricated at Minnesota Nano Center, Minneapolis, MN, USA.

Publisher Copyright:
© 2018, Springer-Verlag GmbH Germany, part of Springer Nature.


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