Retraction notice to “Effects of gases on multi-wall carbon nanotube field emitter for a low energy ion source” [Meas. Sensor 18C (2021) 100341]

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This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal).This article has been retracted at the request of the corresponding author due to similarities identified with a previously published paper, 'Performance of a Low Energy Ion Source with Carbon Nanotube Electron Emitters under the Influence of Various Operating Gases', in Nanomaterials (Nanomaterials 2020, 10(2), 354; https://doi.org/10.3390/nano10020354). The author wishes to apologise for any confusion or inconvenience caused.