Chemically specific identification of carbon in XPS imaging using Multivariate Auger Feature Imaging (MAFI)
Chemically specific identification of carbon in XPS imaging using Multivariate Auger Feature Imaging (MAFI)
复制标题
DOI：
10.1016/j.carbon.2016.05.073
复制
发表时间：
2016-10-01
期刊：
影响因子：
10.9
通讯作者：
Cumpson, Peter J.
中科院分区：
文献类型：
--
作者：
Barlow, Anders J.;Popescu, Sinziana;Cumpson, Peter J.
到目前为止，XPS成像的一个困难的前景是确定碳的相似化学状态。随着新型纳米碳（如纳米管和石墨烯）的出现，在XPS光谱和图像中轻松、明确地识别sp(2)/sp(3)性质不同的材料的能力变得越来越重要。本文提出了在XPS图像中识别这些物种的方法，将焦点从传统分析的C1s区域转移到x射线诱导碳俄歇特征。通过从XPS数据中提取d参数，我们生成了所谓的“d参数图像”，可以清楚地识别出安装在碳带上的石墨片图像中不同碳杂化的区域，以及激光转录氧化石墨烯薄膜中还原氧化石墨烯（GO）的区域。然后通过多变量分析来增强这种方法，我们称之为“多变量螺旋钻特征成像”技术，在这种技术中，表面上不同sp(2)碳含量的区别得到了改善。(C) 2016 Elsevier Ltd.版权所有。
Until now, a difficult prospect in XPS imaging has been the identification of similar chemical states of carbon. With the advent of novel nano-carbons such as nanotubes and graphene, the ability to easily and unambiguously identify materials of varying sp(2)/sp(3) nature in XPS spectra and images is becoming increasingly important. We present herein methods for the identification of such species in XPS images by shifting focus from the traditionally analysed C1s region to the X-ray induced carbon Auger feature. By extracting the D-Parameter from XPS data, we have generated what we refer to as "D-Parameter Images", that clearly identify regions of different carbon hybridisation in an image of a graphite flake mounted on carbon tape, and areas of reduced graphene oxide (GO) in a laser-scribed GO film. This method is then enhanced by multivariate analysis, a technique we call "Multivariate Auger Feature Imaging", where the distinction between varying sp(2) carbon content on a surface is improved. (C) 2016 Elsevier Ltd. All rights reserved.