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Cited by 720

The DOI matches its Crossref record; 63 of the 63 references it cites were found in a registry or an index.

Synthesis of Mo4VAlC4 MAX Phase and Two-Dimensional Mo4VC4 MXene with Five Atomic Layers of Transition Metals

Open access
Deysher, Grayson, Shuck, Christopher Eugene, Hantanasirisakul, Kanit, Frey, Nathan C., Foucher, Alexandre C., Maleski, Kathleen, Sarycheva, Asia, Shenoy, Vivek B., Stach, Eric A., Anasori, Babak, Gogotsi, Yury·2020·ACS Nano

Abstract

MXenes are a family of two-dimensional (2D) transition metal carbides, nitrides, and carbonitrides with a general formula of M n +1 X n T x, in which two, three, or four atomic layers of a transition metal (M: Ti, Nb, V, Cr, Mo, Ta, etc.) are interleaved with layers of C and/or N (shown as X), and T x represents surface termination groups such as −OH, ═O, and −F. Here, we report the scalable synthesis and characterization of a MXene with five atomic layers of transition metals (Mo 4 VC 4 T x ), by synthesizing its Mo 4 VAlC 4 MAX phase precursor that contains no other MAX phase impurities. These phases display twinning at their central M layers which is not present in any other known MAX phases or MXenes. Transmission electron microscopy and X-ray diffraction were used to examine the structure of both phases. Energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and high-resolution scanning transmission electron microscopy with energy-dispersive X-ray spectroscopy were used to study the composition of these materials. Density functional theory calculations indicate that other five transition metal-layer MAX phases (M′ 4 M″AlC 4 ) may be possible, where M′ and M″ are two different transition metals. The predicted existence of additional Al-containing MAX phases suggests that more M 5 C 4 T x MXenes can be synthesized. Additionally, we characterized the optical, electronic, and thermal properties of Mo 4 VC 4 T x . This study demonstrates the existence of an additional subfamily of M 5 X 4 T x MXenes as well as a twinned structure, allowing for a wider range of 2D structures and compositions for more control over properties, which could lead to many different applications.

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Crossref · 10.1021/acsnano.9b07708

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Metadata

Authors
Deysher, G., Shuck, C. E., Hantanasirisakul, K., Frey, N. C., Foucher, A. C., Maleski, K., Sarycheva, A., Shenoy, V. B., Stach, E. A., Anasori, B., & Gogotsi, Y.
Venue
ACS Nano
Published
2019-12-05
Volume
14
Issue
1
Pages
204-217
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
OpenAlex
W2993592145
Cited by
720
References
63
FWCI
22.06
Type
journal article
Language
en
Open access
green

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