Chen-Hui Chou1 Kao-Shuo Chang1

1, National Cheng Kung University, Tainan, , Taiwan

According to previous researches, two-step hydrothermal method was used to deposit ZnSnO3 on the different kinds of substrate and control their alignment with different conditions such as substrate, temperature, surfactant, and others. [1,2] In this research, a novel way was proposed to fabricate ZnSnO3/polymer nanocomposites by simple hydrothermal and polymer epitaxy method. This research emphasized on improving the alignment of ZnSnO3 nanorods[3,4] by polymer epitaxy[5] such as PVDF and its synergistic piezo-related performance of the ZnSnO3/PVDF nanocomposites.[6] PVDF was used to control the alignment of the fabricated ZnSnO3 nanorods and enhance its piezo-related performance including piezopotential, piezotronic, piezophototronic, and piezophotocatalytic analyses.

XRD and SEM were used to characterize the ZnSnO3/PVDF nanocomposites. The results from the XRD confirmed the presence of ZnSnO3. SEM analysis showed the morphologies and alignments of the ZnSnO3 nanorods and PVDF. These nanocomposites exhibited average piezopotentials. Piezotronic analysis was also conducted on ZnSnO3/PVDF nanocomposites, exhibiting high current density when the ZnSnO3 are well-aligned. When under UV light illumination, the output current density obtained were several times higher for ZnSnO3/PVDF. These confirmed the alignment control and synergistic piezophototronic property of the material.

In a piezophotocatalytic experiment, the decomposition of methylene blue (MB) was also investigated. The ZnSnO3/PVDF nanocomposites exhibited better degradation property than pure ZnSnO3. All the promising enhancement was attributed to the well-aligned ZnSnO3, which reduced the recombination of photogenerated electron−hole pairs and enhanced the mobility of these pairs resulting from the energy band distortion caused by applied stresses. Finally, we can use this nanocomposites or this epitaxially fabricating method to other materials on various electronic applications, such as multifunctional electronic-skin.[7]

Keywords: ZnSnO3/PVDF nanocomposites, epitaxy, ZnSnO3 nanorods, piezophotocatalysis, electronic-skin

[1] M.K. Lo, S.Y. Lee and K.S. Chang, J. Phys. Chem. C, 119 (2015) 5218-5224
[2] Y.T. Wang and K.S. Chang, J. Am. Ceram. Soc., 99 (2016) 2593-2600
[3] C. Fang, B. Geng, J. Liu, F. Zhan, Chem. Commun., (2009) 2350–2352
[4] Z. Zhang, J. Huang, B. Dong, Q. Yuan, Y. He, O.S. Wolfbeis, Nanoscale Res. Lett., 7 (2015) 4149-4155
[5] W.C. Cheng, C.Y. Yang, B.Y. Kang, M.Y. Kuo and J. Ruan, Soft Matter, 9 (2013) 10822-10831
[6] H.M. Lin, K.S. Chang, RSC Adv., 7 (2017) 30513-30520
[7] H. He, Y. Fu, W. Zang, Q. Wang, L. Xing, Y. Zhang, X. Xue, Nano Energy, 31 (2017) 37-48