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. 2017 Aug 17;7:8524. doi: 10.1038/s41598-017-08886-y

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(a–c) Different spatial arrangement of the 3D hollow nanoelectrodes arrays framed by the yellow squares. Only the cells grew in adhesion with the hollow nanostructures are delivered with PI (in red) after the soft-electroporation. Cells in the images are NIH-3T3 and the scale bar is 100 μm for each image.