3D-Printed Chemiresistive Sensor Array on Nanowire CuO/Cu2O/Cu Heterojunction Nets
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SIEBERT, Leonard; LUPAN, Oleg; MIRABELLI, Mattia; ABABII, Nicolai; TERASA, Maik-Ivo; KAPS, Soren; CREŢU, Vasilii; VAHL, Alexander; FAUPEL, Franz; ADELUNG, Rainer. 3D-Printed Chemiresistive Sensor Array on Nanowire CuO/Cu2O/Cu Heterojunction Nets. In: ACS Applied Materials and Interfaces. 2019, nr. 11(28), pp. 25508-25515. ISSN -.
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ACS Applied Materials and Interfaces
Numărul 11(28) / 2019 / ISSN - /ISSNe 1944-8244

3D-Printed Chemiresistive Sensor Array on Nanowire CuO/Cu2O/Cu Heterojunction Nets

DOI: 10.1021/acsami.9b04385
Pag. 25508-25515

Siebert Leonard1, Lupan Oleg12, Mirabelli Mattia1, Ababii Nicolai2, Terasa Maik-Ivo1, Kaps Soren1, Creţu Vasilii2, Vahl Alexander1, Faupel Franz1, Adelung Rainer1
1 Christian-Albrechts University of Kiel,
2 Technical University of Moldova
Disponibil în IBN: 15 august 2019


In this work, the one-step three-dimensional (3D) printing of 20 nm nanowire (NW)-covered CuO/Cu2O/Cu microparticles (MPs) with diameters of 15-25 μm on the surface of the glass substrate forming an ordered net is successfully reported for the first time. 3D-printed Cu MP-based stripes formed nonplanar CuO/Cu2O/Cu heterojunctions after thermal annealing at 425 °C for 2 h in air and were fully covered with a 20 nm NW net bridging MPs with external Au contacts. The morphological, vibrational, chemical, and structural investigations were performed in detail, showing the high crystallinity of the NWs and 3D-printed CuO/Cu2O/Cu heterojunction lines, as well as the growth of CuO NWs on the surface of MPs. The gas-sensing measurements showed excellent selectivity to acetone vapor at an operating temperature of 350 °C with a high gas response about 150% to 100 ppm. The combination of the possibility of fast acetone vapor detection, low power consumption, and controllable size and geometry makes these 3D-printed devices ideal candidates for fast detection, as well as for acetone vapor monitoring (down to 100 ppm). This 3D-printing approach will pave a new way for many different devices through the simplicity and versatility of the fabrication method for the exact detection of acetone vapors in various atmospheres.

3D-printing, Cu deposition, CuO/Cu2O/Cu, gas sensing, heterojunction