Retraction notice to “Porous germanium with copper nanoparticles formed by ion implantation” [Vacuum 166 (2019) 84–87] (Vacuum (2019) 166 (84–87), (S0042207X19307195), (10.1016/j.vacuum.2019.04.062))

Abstract

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Editor in Chief due to very significant similarity between it and another published article by the same corresponding author, which has copied Fig. 1 and results from Nanotechnologies in Russia 13 (2018) 487–495 [Rossiiskie Nanotekhnologii, 2018, Vol. 13, Nos. 9–10], DOI: 10.1134/S1995078018050129.