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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) Transmission image of NIH-3T3 cells fixed on an array of hollow nanoelectrodes – the black dots inside the red square – embedded in SU8. (b) SEM top view image of CPD dried NIH-3T3 cells cultured on top of the hollow nanoelectrodes. (c) Cross section of CPD dried cell grew on top of a hollow nanoelectrode. From this image it is possible to see all the layers of the fabrication (Si₃N₄ membrane 100 μm thick, SU8) and the hollow 3D nanoelectrode that is engulfed by the cellular membrane.