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X-ray photoelectron spectroscopy of select multi-layered transition metal carbides (MXenes)
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten. Drexel University, PA 19104 USA; Drexel University, PA 19104 USA.ORCID-id: 0000-0002-7502-1215
Naval Air Syst Command, MD 20670 USA.
Oak Ridge National Lab, TN 37831 USA.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.ORCID-id: 0000-0003-1785-0864
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2016 (engelsk)Inngår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 362, s. 406-417Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

In this work, a detailed high resolution X-ray photoelectron spectroscopy (XPS) analysis is presented for select MXenes a recently discovered family of two-dimensional (2D) carbides and carbonitrides. Given their 2D nature, understanding their surface chemistry is paramount. Herein we identify and quantify the surface groups present before, and after, sputter-cleaning as well as freshly prepared vs. aged multi layered cold pressed discs. The nominal compositions of the MXenes studied here are Ti-3 C2Tx,Ti3CNTx, Nb2CTx and Nb4C3Tx where T represents surface groups that this work attempts to quantify. In all the cases, the presence of three surface terminations, O, OH and F, in addition to OH-terminations relatively strongly bonded to H2O molecules, was confirmed. From XPS peak fits, it was possible to establish the average sum of the negative charges of the terminations for the aforementioned MXenes. Based on this work, it is now possible to quantify the nature of the surface terminations. This information can, in turn, be used to better design and tailor these novel 2D materials for various applications. Published by Elsevier B.V.

sted, utgiver, år, opplag, sider
ELSEVIER SCIENCE BV , 2016. Vol. 362, s. 406-417
Emneord [en]
MXene; XPS; Metal carbides
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Identifikatorer
URN: urn:nbn:se:liu:diva-125310DOI: 10.1016/j.apsusc.2015.11.089ISI: 000368657900056OAI: oai:DiVA.org:liu-125310DiVA, id: diva2:906285
Merknad

Funding Agencies|Swedish Research Council (VR) [642-2013-8020]; European Research Council under the European Communities/ERC [258509]; KAW Fellowship program; Swedish Foundation for Strategic Research (SSF) through the synergy grant FUNCASE; Future Research Leaders 5 program; Laboratory Directed Research and Development Program of Oak Ridge National Laboratory

Tilgjengelig fra: 2016-02-24 Laget: 2016-02-19 Sist oppdatert: 2024-01-10

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Halim, JosephEklund, PerRosén, JohannaBarsoum, Michel

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