Double transition metal MXenes with wide band gaps and novel magnetic properties

Sun, Weiwei; Xie, Yu; Kent, Paul

doi:10.1039/c8nr00513c

Cited by 100 publications

(70 citation statements)

References 39 publications

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“…Among the magnetic MAX phases, only Cr 2 TiAlC 2 has been exfoliated into Cr 2 TiC 2 [36]. Interestingly, all members of Cr 2 TiC 2 T 2 (T= H, F, O, OH) are semiconductors independently of the termination group [81]. It is noteworthy that the majority of magnetic MXenes have anti-ferromagnetic ground states except for some of the Mn-based ones, which are ferromagnetic [81].…”

Section: Magnetic Statesmentioning

confidence: 99%

“…Interestingly, all members of Cr 2 TiC 2 T 2 (T= H, F, O, OH) are semiconductors independently of the termination group [81]. It is noteworthy that the majority of magnetic MXenes have anti-ferromagnetic ground states except for some of the Mn-based ones, which are ferromagnetic [81]. Furthermore, the magnetic and electronic states of M 2 X MXenes can be engineered by strain [73].…”

Section: Magnetic Statesmentioning

confidence: 99%

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Recent advances in MXenes: From fundamentals to applications

Khazaei

Mishra

Venkataramanan

et al. 2019

Current Opinion in Solid State and Materials Science

294

147

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The family of MAX phases and their derivative MXenes are continuously growing in terms of both crystalline and composition varieties. In the last couple of years, several breakthroughs have been achieved that boosted the synthesis of novel MAX phases with ordered double transition metals and, consequently, the synthesis of novel MXenes with a higher chemical diversity and structural complexity, rarely seen in other families of two-dimensional (2D) materials. Considering the various elemental composition possibilities, surface functional tunability, various magnetic orders, and large spin−orbit coupling, MXenes can truly be considered as multifunctional materials that can be used to realize highly correlated phenomena. In addition, owing to their large surface area, hydrophilicity, adsorption ability, and high surface reactivity, MXenes have attracted attention for many applications, e.g., catalysts, ion batteries, gas storage media, and sensors. Given the fast progress of MXene-based science and technology, it is timely to update our current knowledge on various properties and possible applications. Since many theoretical predictions remain to be experimentally proven, here we mainly emphasize the physics and chemistry that can be observed in MXenes and discuss how these properties can be tuned or used for different applications.

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Section: Magnetic Statesmentioning

confidence: 99%

Section: Magnetic Statesmentioning

confidence: 99%

Recent advances in MXenes: From fundamentals to applications

Khazaei

Mishra

Venkataramanan

et al. 2019

Current Opinion in Solid State and Materials Science

294

147

View full text Add to dashboard Cite

show abstract

“…The overall electronic properties will be highly dependent on the overall DOS near the Fermi level which contains both M ' and M " partially filled d orbitals due to degeneracy effect. This means doubletransition metal MXene can be intrinsic semiconductors (like the ordered Mo2TiC2 and Cr2TiC2 74,75 ) or semi-metal (like Ti2MnC2Tx 76 ). It is interesting that Ti2MnC2Tx is still found to be ferromagnetic in the ground state regardless of their surface terminations, 76 while surface terminations have been shown to quench magnetism in single MXene like Ti2CTx.…”

Section: Effect Of Metal Speciesmentioning

confidence: 99%

Theory-guided materials design: two-dimensional MXenes in electro- and photocatalysis

2019

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“…Although several semiconducting MXenes have been predicted and some have been synthesized, presently, the electronics community has been focusing on the metallic‐like MXenes, exploring their applications in interconnects, antenna, electromagnetic interference (EMI) shielding, etc. [ 24,99–101 ] On the other hand, MXenes have also exhibited intriguing optoelectronic and plasmonic properties owing to their ultra‐broadband absorption, which almost spans the whole electromagnetic spectrum from UV–visible, near‐infrared (NIR) and THz to radio‐frequency. [ 97,102–106 ] Nonetheless, their electronic and optical applications remain to be less than sufficient, and mostly limited to small‐area devices.…”

Section: Printing Mxenes For Various Applicationsmentioning

confidence: 99%

MXene Printing and Patterned Coating for Device Applications

et al. 2020

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As a thriving member of the 2D nanomaterials family, MXenes, i.e., transition metal carbides, nitrides, and carbonitrides, exhibit outstanding electrochemical, electronic, optical, and mechanical properties. They have been exploited in many applications including energy storage, electronics, optoelectronics, biomedicine, sensors, and catalysis. Compared to other 2D materials, MXenes possess a unique set of properties such as high metallic conductivity, excellent dispersion quality, negative surface charge, and hydrophilicity, making them particularly suitable as inks for printing applications. Printing and pre/post-patterned coating methods represent a whole range of simple, economically efficient, versatile, and eco-friendly manufacturing techniques for devices based on MXenes. Moreover, printing can allow for complex 3D architectures and multifunctionality that are highly required in various applications. By means of printing and patterned coating, the performance and application range of MXenes can be dramatically increased through careful patterning in three dimensions; thus, printing/ coating is not only a device fabrication tool but also an enabling tool for new applications as well as for industrialization.devices. This is because solution processes such as liquid-phase exfoliation is crucial for the dispersion formation and mass production, as well as for the postsynthesis treatments on the 2D nanosheets such as sorting in terms of flake size and thickness, functionalization, compositing, etc., all of which are crucial for the ink formulation process required by printing. [6] Printed electronics technology has acquired considerable interest from both academia and industry recently. [7][8][9] Unlike traditional methods such as vacuum deposition and photolithography, printing technologies hold great promise for fast, high-volume, and low-cost manufacturing, especially for the fabrication of flexible devices. [10][11][12][13][14][15] The combination of 2D materials with printing started as early as 2012 when liquid-phase-exfoliated graphene dispersion was inkjet-printed to fabricate field-effect transistors. [16] It has since progressed from directly using the unoptimized dispersion obtained from the solution processing as inks to making formulated inks targeted toward specific printing methods and target applications (e.g., conductive tracks, transparent electrodes, transistors, photodetectors, energy storage devices such as supercapacitors, batteries, sensors, etc.). [17][18][19][20][21] As a new member to the 2D nanomaterials family, transition metal carbides, nitrides, and carbonitrides, also known as MXenes, possess outstanding electrochemical, electronic, optical, and mechanical properties, and thus have shown great promise in applications including energy storage, electronics, optoelectronics, biomedicine, sensors, and catalysis. [22][23][24][25] Research on MXenes dates back to 2011 when single-layered titanium carbide Ti 3 C 2 was synthesized and separated for the first time, [26] and has since evol...

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Double transition metal MXenes with wide band gaps and novel magnetic properties

Cited by 100 publications

References 39 publications

Recent advances in MXenes: From fundamentals to applications

Recent advances in MXenes: From fundamentals to applications

Theory-guided materials design: two-dimensional MXenes in electro- and photocatalysis

MXene Printing and Patterned Coating for Device Applications

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