Journal ArticleDOI
Electromagnetic interference shielding with 2D transition metal carbides (MXenes)
Faisal Shahzad,Mohamed Alhabeb,Christine B. Hatter,Babak Anasori,Soon Man Hong,Chong Min Koo,Yury Gogotsi +6 more
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TLDR
The mechanical flexibility and easy coating capability offered by MXenes and their composites enable them to shield surfaces of any shape while providing high EMI shielding efficiency.Abstract:
Materials with good flexibility and high conductivity that can provide electromagnetic interference (EMI) shielding with minimal thickness are highly desirable, especially if they can be easily processed into films. Two-dimensional metal carbides and nitrides, known as MXenes, combine metallic conductivity and hydrophilic surfaces. Here, we demonstrate the potential of several MXenes and their polymer composites for EMI shielding. A 45-micrometer-thick Ti3C2Tx film exhibited EMI shielding effectiveness of 92 decibels (>50 decibels for a 2.5-micrometer film), which is the highest among synthetic materials of comparable thickness produced to date. This performance originates from the excellent electrical conductivity of Ti3C2Tx films (4600 Siemens per centimeter) and multiple internal reflections from Ti3C2Tx flakes in free-standing films. The mechanical flexibility and easy coating capability offered by MXenes and their composites enable them to shield surfaces of any shape while providing high EMI shielding efficiency.read more
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Journal ArticleDOI
Hydrophobic and Stable MXene–Polymer Pressure Sensors for Wearable Electronics
La Li,Xiyao Fu,Shuai Chen,Simge Uzun,Ariana Levitt,Christopher E. Shuck,Wei Han,Yury Gogotsi +7 more
TL;DR: Multi-layer MXene particles were incorporated into the hydrophobic polymer polyvinylidene fluoride trifluoroethylene (P(VDF-TrFE) and assembled into highly sensitive piezoresistive pressure sensors, which show a fast response time of 16 ms in addition to excellent long-term stability with no obvious responsivity attenuation when the sensor is exposed to air, even after 20 weeks.
Journal ArticleDOI
Charge transfer induced polymerization of EDOT confined between 2D titanium carbide layers
Chi Chen,Chi Chen,Muhammad Boota,Xiuqiang Xie,Xiuqiang Xie,Meng-Qiang Zhao,Babak Anasori,Chang E. Ren,Ling Miao,Jianjun Jiang,Yury Gogotsi +10 more
TL;DR: In this article, a combined experimental and theoretical study revealed the mechanism of charge-transfer-induced polymerization of 3,4-ethylenedioxythiophene (EDOT), which can be extended to other similar polymers.
Journal ArticleDOI
2D carbide MXene Ti2CTX as a novel high-performance electromagnetic interference shielding material
TL;DR: In this article, a conductive 2D Ti2CTX MXene with native sandwich-like structure and abundant surface functional groups is synthesized via a simple chemical etching process.
Journal ArticleDOI
Improving oxidation stability of 2D MXenes: synthesis, storage media, and conditions
Aamir Iqbal,Aamir Iqbal,Jun-Pyo Hong,Jun-Pyo Hong,Tae Yun Ko,Chong Min Koo,Chong Min Koo,Chong Min Koo +7 more
TL;DR: The nature of oxidative degradation of MXenes is demonstrated and the recent advancements in controlling the oxidation kinetics ofMXenes are highlighted with several promising strategic approaches, including careful control of the quality of the parent MAX phase, chemical etching conditions, defect passivation, dispersion medium, storage conditions, and polymer composites.
References
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Journal ArticleDOI
Two‐Dimensional Nanocrystals Produced by Exfoliation of Ti 3 AlC 2
Michael Naguib,Murat Kurtoglu,Volker Presser,Jun Lu,Junjie Niu,Min Heon,Lars Hultman,Yury Gogotsi,Michel W. Barsoum +8 more
TL;DR: 2D nanosheets, composed of a few Ti 3 C 2 layers and conical scrolls, produced by the room temperature exfoliation of Ti 3 AlC 2 in hydrofl uoric acid are reported, which opens a door to the synthesis of a large number of other 2D crystals.
Journal ArticleDOI
25th Anniversary Article: MXenes: A New Family of Two‐Dimensional Materials
TL;DR: In this article, a new family of two-dimensional early transition metal carbides and carbonitrides, called MXenes, was discovered and a detailed outlook for future research on MXenes is also presented.
Journal ArticleDOI
Conductive two-dimensional titanium carbide ‘clay’ with high volumetric capacitance
TL;DR: This capacitance report reports a method of producing two-dimensional titanium carbide ‘clay’ using a solution of lithium fluoride and hydrochloric acid that offers a much faster route to film production as well as the avoidance of handling hazardous concentrated hydrofluoric acid.
Journal ArticleDOI
Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide
Maria R. Lukatskaya,Olha Mashtalir,Chang E. Ren,Yohan Dall'Agnese,Patrick Rozier,Pierre-Louis Taberna,Michael Naguib,Patrice Simon,Patrice Simon,Michel W. Barsoum,Yury Gogotsi +10 more
TL;DR: This study demonstrates the spontaneous intercalation of cations from aqueous salt solutions between two-dimensional (2D) Ti3C2 MXene layers, and provides a basis for exploring a large family of 2D carbides and carbonitrides in electrochemical energy storage applications using single- and multivalent ions.
Journal ArticleDOI
Electromagnetic interference shielding effectiveness of carbon materials
TL;DR: Carbon materials for electromagnetic interference (EMI) shielding are reviewed in this article, including composite materials, colloidal graphite and flexible graphite, and they include carbon filaments of submicron diameter.