Abstract
Sensors start to play an ever increasing role in human life and new technologies for their cost-effective mass production are required. In this work, the one-step 3D-printing of nanoflakes—nanowire covered Fe2O3/Fe–CuO/Cu2O/Cu microparticles (MPs) with diameters of ~10 µm on the surface of glass substrate successfully forming an ordered net is reported for the first time. 3D-printed Fe–Cu and only Cu MPs-based stripes formed non-planar CuO/Cu2O/Cu and Fe2O3/Fe–CuO/Cu2O/Cu heterojunctions after thermal annealing at 425 ℃ for 4 h in air and were fully covered with nanoflakes of Fe2O3 and CuO nanowire net bridging MPs with external Au-contacts. The morphological, chemical and structural investigations were performed in detail, showing the high crystallinity of the 3D printed material. This concept proves to be easily translatable to other semiconducting, metallic or functional microparticles for the rapid fabrication of sensor devices.
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Acknowledgements
This work was financially supported by the German Research Foundation (DFG) via the research unit FOR 2093 “Memristive devices for neuronal systems” through project A2. Additional funding was provided under the project “Hot End” (grant number: 16KN021247), by the Federal ministry for Economic Affairs and Energy. Moreover, this research was partly supported by the project Institutional inst-15.817.02.29A funded by the Government of the Republic of Moldova and by the Technical University of Moldova. Dr. Oleg Lupan acknowledges the Alexander von Humboldt Foundation for the research fellowship for experienced researchers 3-3MOL/1148833 STP at the Institute for Materials Science, Kiel University, Germany. The authors would like to thank J. Bahr for the technical assistance and Prof. Tiginyanu for fruitful scientific discussion.
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Siebert, L., Terasa, M.I., Ababii, N., Lupan, O., Adelung, R. (2020). 3D-Printed Sensor Array of Semiconducting Oxides. In: Tiginyanu, I., Sontea, V., Railean, S. (eds) 4th International Conference on Nanotechnologies and Biomedical Engineering. ICNBME 2019. IFMBE Proceedings, vol 77. Springer, Cham. https://doi.org/10.1007/978-3-030-31866-6_1
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