Abstract
A microwave-assisted two-steps method was proposed for the facile and fast preparation of silver nanoparticle conductive ink. The nanoparticles in the ink are of multi-sized, which is beneficial to getting higher packing density and better conductivity of the printed/written pattern. The effects of the reaction parameters of microwave and additives on the written pattern resistivity were studied on the basis of scanning electron microscope, X-ray diffraction and surface porosity results. Both of the microwave energy and the addition of PVP as the cap** agent were found to be critical for the formation of face-centered cubic silver nanoparticles in the conductive ink. The surface porosity and the pore distribution form were also demonstrated to affect the pattern conductivity. The electrical resistivity or the pattern written with the ink prepared at microwave irradiation time of 90 s was calculated to be 364 μΩ cm. The second step of simple centrifugation process could improve the pattern conductivity effectively. After concentrated the conductive ink for two times, the electrical resistivity of the written pattern reduced from 364 to 77 μΩ cm. The proposed two-steps of microwave combined with centrifugation method is a simple and useful way for the preparation of silver nanoparticle conductive ink that can be used in printed electronics.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (Grant Nos. 61704067 and 51775242), General Scientific Research Project of Zhejiang Education Department (Grant No. Y201738195), Science and Technology Innovation Program for College Students in Zhejiang Province (New Talent Program) (Grant No. 2018R417040), and the Project of Zhejiang Provincial Natural Science Foundation of China (Grant No. LGG18F040001).
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Tang, C., Zheng, S., Wang, F. et al. Microwave-assisted two-steps method for the facile preparation of silver nanoparticle conductive ink. J Mater Sci: Mater Electron 30, 11588–11597 (2019). https://doi.org/10.1007/s10854-019-01516-5
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DOI: https://doi.org/10.1007/s10854-019-01516-5