Correction to: Scientific Reports https://doi.org/10.1038/s41598-019-48921-8, published online 28 August 2019

This Article contains errors in References 1, 20, 45, 56 and 57 which were incorrectly given as:

Xiong, Y. J. et al. Structural broadband absorbing metamaterial based on three-dimensional printing technology. Acta Phys. Sin. 67, 084202, https://doi.org/10.1007/s12110-009-9068-2 (2018).

Liang, K., Carmone, S., Brambilla, D. & Leroux, J. C. 3D printing of a wearable personalized oral delivery device: A first-in-human study. Sci Adv 4, eaat2544, https://doi.org/ARTN eaat254410.1126/sciadv.aat2544 (2018).

Chai, X. Y. et al. Fused Deposition Modeling (FDM) 3D Printed Tablets for Intragastric Floating Delivery of Domperidone. Sci. Rep. 7, 2829, https://doi.org/ARTN 282910.1038/ s41598-017-03097-x (2017).

He, S. et al. Low-temperature-cured highly conductive composite of Ag nanowires & polyvinyl alcohol. Chin. Phys. B 26, 078103, https://doi.org/Artn07810310.1088/1674-1056/26/7/078103 (2017).

Liang, Z. et al. Facile Synthesis of Nitrogen-Doped Microporous Carbon Spheres for High Performance Symmetric Supercapacitors. Nanoscale Res. Lett. 13, 314–314 (2018).

The correct References are listed below as references 1,2,3,4,5 respectively.