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. 2014 Jun 25;9(1):318. doi: 10.1186/1556-276X-9-318

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Copyright © 2014 Valalaki and Nassiopoulou; licensee Springer.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

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Porous Si SEM images used for the calculation of Hausdorff dimension. Examples of cross-sectional SEM images (a₁) and top view images (b₁) of the studied porous Si layer with their corresponding binary images (a₂) and (b₂), used for the calculation of the box counting dimension.