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

Siebert Leonard; Lupan Oleg; Mirabelli Mattia; Ababii Nicolai; Terasa Maik-Ivo; Kaps Soren; Creţu Vasilii; Vahl Alexander; Faupel Franz; Adelung Rainer

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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, vol. 11, pp. 25508-25515. ISSN -. DOI: https://doi.org/10.1021/acsami.9b04385

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ACS Applied Materials and Interfaces

Volumul 11 / 2019 / ISSN - /ISSNe 1944-8244

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

DOI:https://doi.org/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

Rezumat

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.

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

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