Atomic-scale investigations of Ti3C2Tx MXene surfaces

White, Katherine E.; Chu, Yi Zhi; Gani, Gilad; Ippolito, Stefano; Barr, Kristopher K.; Thomas, John C.; Weber-Bargioni, Alexander; Lau, Kah Chun; Gogotsi, Yury; Weiss, Paul S.

doi:10.1016/j.matt.2024.06.025

Atomic-scale investigations of Ti₃C₂T_x MXene surfaces

Journal Article · Wed Jul 03 04:00:00 EDT 2024 · Matter (Online)

DOI:https://doi.org/10.1016/j.matt.2024.06.025· OSTI ID:2500268

White, Katherine E. ^[1]; Chu, Yi Zhi ^[2]; Gani, Gilad ^[1]; Ippolito, Stefano ^[3]; Barr, Kristopher K. ^[1]; Thomas, John C. ^[4]; Weber-Bargioni, Alexander ^[4]; Lau, Kah Chun ^[5]; Gogotsi, Yury ^[3]; ^[1]

University of California, Los Angeles, CA (United States)
California State University, Northridge (CSUN), CA (United States); Michigan Technological University, Houghton, MI (United States)
Drexel University, Philadelphia, PA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Molecular Foundry
California State University, Northridge (CSUN), CA (United States)

The family of two-dimensional (2D) carbides and/or nitrides, also known as MXenes, has generated great excitement within the scientific community and has been proposed for a wide variety of applications since its discovery. Despite this attention, there have been only limited studies of the atomically resolved local electronic and physical structure of MXene surfaces strongly affecting the physicochemical properties of these materials. Here, in this study, we report local structural, spectroscopic, and chemical investigations of the surfaces of Ti₃C₂T_x flakes using scanning tunneling microscopy and spectroscopy, closely coupled to theoretical studies. Terminal groups are visualized and characterized, along with surface TiO₂ clusters formed upon exposure to air. Fundamental insight into the local electronic and chemical properties associated with different terminal groups on MXenes and their oxidation products is presented.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 2500268

Journal Information:: Matter (Online), Journal Name: Matter (Online) Journal Issue: 7 Vol. 7; ISSN 2590-2385

Publisher:: Cell Press/ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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