期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 28, 页码 25508-25515出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b04385
关键词
3D-printing; Cu deposition; heterojunction; CuO/Cu2O/Cu; gas sensing
资金
- German Research Foundation (DFG) [FOR 2093]
- project Hot End - Federal ministry for Economic Affairs and Energy [16KN021247]
- Government of the Republic of Moldova [15.817.02.29A]
- Technical University of Moldova
- Alexander von Humboldt Foundation [3-3MOL/1148833 STP]
In this work, the one-step three-dimensional (3D) printing of 20 rim nanowire (NW)-covered CuO/Cu2O/Cu microparticles (MPs) with diameters of 15-25 mu m 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 degrees C for 2 h in air and were fully covered with a 20 rim 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 degrees 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.
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