Scalable, Highly Conductive, and Micropatternable MXene Films for Enhanced Electromagnetic Interference Shielding

Lipton, Jason; Röhr, Jason A.; Dang, Vi; Goad, Adam; Maleski, Kathleen; Lavini, Francesco; Han, Meikang; Tsai, Esther H. R.; Weng, Guoming; Kong, Jaemin; Riedo, Elisa; Gogotsi, Yury; Taylor, André D.

doi:10.1016/j.matt.2020.05.023

Cited by 154 publications

(121 citation statements)

References 34 publications

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“…It is proper that the higher the thickness, the lower the sheet resistance of MXene films. 39 − 45 As mentioned above, a thicker layer of the sensing material is unfavorable to absorb target analytes of the MXene surface, so it is essential to obtain a thin material layer with low resistivity. Moreover, the thickness and sheet resistance are compared with various transferring techniques ( Figure 9 B).…”

Section: Resultsmentioning

confidence: 99%

A Simple Approach to MXene Micropatterning from Molecularly Driven Assembly

et al. 2021

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Here, a micropatterning strategy is demonstrated to achieve stable and selective MXene adsorption through the molecularly driven assembly. MXene flakes were assembled by strong interaction with a silicon substrate, which was functionalized by microcontact printing (μCP) to create an active surface. A clear micropattern was observed by scanning electron microscopy showing uniform coverage of MXene flakes. Atomic force microscopy revealed a pattern thickness of around 50 nm, much thinner than the patterns obtained by direct μCP. The obtained micropattern presents good stability against rinsing and sonication. X-ray photoelectron spectroscopy shows that this stability can be attributed to strong covalent bonding between MXene and active molecules on a silicon substrate. The sheet resistance of the as-formed MXene layer was measured at around 154.67 (Ω/□), which is lower than those of other published techniques with a similar thickness of around 50 nm. This method can achieve a well-defined MXene pattern around the sub-100 μm scale without requiring prior MXene surface modification. Therefore, MXene can retain its intrinsic surface property, allowing further molecule adsorption as a sensing platform. Moreover, this patterning technique does not require complicated control of ink preparation and offers possible application on a substrate of any geometry with few layers of thickness.

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Section: Resultsmentioning

confidence: 99%

A Simple Approach to MXene Micropatterning from Molecularly Driven Assembly

et al. 2021

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“…Many efforts have been made in scalable manufacturing of MXenes. 136 Recently, the scalable manufacture of MXene films has made great progress, 137,138 which is a positive direction for taking MXenes from the lab to commercial products. However, there are still risks in MXene research and potential device applications.…”

Section: Llmentioning

confidence: 99%

MXenes: An Emerging Platform for Wearable Electronics and Looking Beyond

Peng

Ong

et al. 2021

Matter

162

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“…MXene-coated conductive fabrics have also been developed to be potentially used for wearable RF applications [6]. Furthermore, MXene is a hydrophilic and solution-processable conductive nanomaterial that offers excellent flexibility and can be deposited on any surface to achieve complex RF structures using many different coating techniques, including spray-coating, inkjetprinting, screen-printing, blade coating, etc., [7][8][9]. In addition, the thickness of MXene coatings can be controlled at the nanometer scale, due to the nanometer-thick MXene flakes.…”

Section: Introductionmentioning

confidence: 99%

Anomalous Radio Frequency Conductivity and Sheet Resistance of 2D Ti₃C₂T_x MXene

Tajin

Dandekar

2022

IEEE Access

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In this paper, we demonstrate the anomalous radio frequency (RF) performance of a 2D nanomaterial, Ti 3 C 2 T x MXene, by extracting conductivity and sheet resistance at both direct current (DC) and RF. Two-port microstrip transmission lines with detachable top layers, copper ground layer, and end launch connectors were fabricated. MXene transmission lines were manufactured through the deposition of layers with thicknesses of of 2 µm, 1 µm, and 0.2 µm onto polyethylene terephthalate (PET) substrates.Copper transmission lines were fabricated to serve as a benchmark. Two-port S-parameters were measured using a network analyzer from 0.9 GHz to 1.4 GHz and Telegrapher's equation RLGC parameters (per unit length resistance R, inductance L, conductance G, and capacitance C) were extracted. The RF sheet resistance values of MXene films, as well as copper, were extracted from the R-values. S-parameters were simulated with the extracted RF sheet resistance values and a good match was found with the measured values. S-parameters were also simulated using the 4-point conductivity and thickness of the MXene films. The RF conductivity of the MXene coating was found to be 35,000 S/cm, higher than the DC conductivity of the material (10,000-15,000 S/cm). This work gives a guideline on designing MXene-based communication devices which are different from those fabricated with conventional metals. INDEX TERMSConductive 2D nanomaterial, flexible antenna, MXene, radio frequency sheet resistance, Ti 3 C 2 T x , transmission line

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Scalable, Highly Conductive, and Micropatternable MXene Films for Enhanced Electromagnetic Interference Shielding

Cited by 154 publications

References 34 publications

A Simple Approach to MXene Micropatterning from Molecularly Driven Assembly

A Simple Approach to MXene Micropatterning from Molecularly Driven Assembly

MXenes: An Emerging Platform for Wearable Electronics and Looking Beyond

Anomalous Radio Frequency Conductivity and Sheet Resistance of 2D Ti₃C₂T_x MXene

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Scalable, Highly Conductive, and Micropatternable MXene Films for Enhanced Electromagnetic Interference Shielding

Cited by 154 publications

References 34 publications

A Simple Approach to MXene Micropatterning from Molecularly Driven Assembly

A Simple Approach to MXene Micropatterning from Molecularly Driven Assembly

MXenes: An Emerging Platform for Wearable Electronics and Looking Beyond

Anomalous Radio Frequency Conductivity and Sheet Resistance of 2D Ti3C2T x MXene

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Anomalous Radio Frequency Conductivity and Sheet Resistance of 2D Ti₃C₂T_x MXene