1 Retraction note: Materials and Structures https://doi.org/10.1617/s11527-014-0397-1

The Editor-in-Chief and Publisher have retracted this article because the validity of the content of this article cannot be verified. An investigation by the Publisher found evidence suggestive of attempts to subvert the peer review and publication system. In addition, there is significant overlap with three previously published articles [1,2,3]. The author has not responded to correspondence from the publisher about this retraction.