MXene interlayered crosslinked conducting polymer film for highly specific absorption and electromagnetic interference shielding

Bora, Pritom J.; Anil, Amith G.; Ramamurthy, Praveen C.; Tan, Daniel Q.

doi:10.1039/d0ma00005a

Cited by 52 publications

(34 citation statements)

References 24 publications

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“…Figure 2e,f shows the power accepted by the MXene and magnetic MXene hybrids, respectively. The electromagnetic power accepted by the It is always a challenge to get a wide bandwidth from a single-layer traditional uniform bulky composite [4][5][6][7][8][9][10][11][12][13]. Traditionally, the classic pyramid structure is well known for broadband microwave absorption for intrinsic wave impedance.…”

Section: Resultsmentioning

confidence: 99%

“…It is always a challenge to get a wide bandwidth from a single-layer traditional uniform bulky composite [ 4 – 13 ]. Traditionally, the classic pyramid structure is well known for broadband microwave absorption for intrinsic wave impedance.…”

Section: Resultsmentioning

confidence: 99%

“…The uniform single-layer bulk microwave dielectric (paraffin-TiO 2 -Ti 3 C 2 T x ) could generate quarter wavelength resonance depending on absorber thickness, and due to that for smaller thicknesses effective absorption takes place in high-frequency region ( figure 5 a ). In the case of Fe 3 O 4 @TiO 2 -Ti 3 C 2 T x MXene hybrid, 3/4 wavelength resonance also took place along with a quarter wavelength resonance due to the presence of magnetic component [ 4 , 12 ]. In addition, it also possesses a better impedance matching.…”

Section: Resultsmentioning

confidence: 99%

“…In the recent years, the cutting-edge telecommunication, healthcare systems, detective systems, military applications, etc., predominantly use microwave frequency [1][2][3][4][5][6][7]. However, due to the presence of electromagnetic interference (EMI) or electromagnetic threat, the need of microwave absorbing materials is increasingly felt especially in the frequency range 2-18 GHz [2][3][4]. The traditional ferrites-based and carbon-based absorbers have many disadvantages such as low specific absorption, corrosion and narrow bandwidth [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…However, due to the presence of electromagnetic interference (EMI) or electromagnetic threat, the need of microwave absorbing materials is increasingly felt especially in the frequency range 2-18 GHz [2][3][4]. The traditional ferrites-based and carbon-based absorbers have many disadvantages such as low specific absorption, corrosion and narrow bandwidth [4][5][6][7][8][9][10]. Polymer-based EMI absorbers using different fillers such as conducting and magnetic nanoparticles are also not capable of offering high broadband microwave absorption as a single layer because of low impedance match and quarter wavelength resonance [10].…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of microwave absorption bandwidth of MXene nanocomposites through macroscopic design

2020

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MXene, the new family of two-dimensional materials having numerous nanoscale layers, is being considered as a novel microwave absorption material. However, MXene/functionalized MXene-loaded polymer nanocomposites exhibit narrow reflection loss (RL) bandwidth (RL less than or equal to −10 dB). In order to enhance the microwave absorption bandwidth of MXene hybrid-matrix materials, for the first time, macroscopic design approach is carried out for TiO 2 -Ti 3 C 2 T x MXene and Fe 3 O 4 @TiO 2 -Ti 3 C 2 T x MXene hybrids through simulation. The simulated results indicate that use of pyramidal meta structure of MXene can significantly tune the RL bandwidth. For optimized MXene hybrid-matrix materials pyramid pattern, the bandwidth enhances to 3–18 GHz. Experimental RL value well matched with the simulated RL. On the other hand, the optimized Fe 3 O 4 @TiO 2 -Ti 3 C 2 T x hybrid exhibits two specific absorption bandwidths (minimum RL value - −47 dB). Compared with other two-dimensional nanocomposites such as graphene or Fe 3 O 4 -graphene, MXene hybrid-matrix materials show better microwave absorption bandwidth in macroscopic pattern.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhancement of microwave absorption bandwidth of MXene nanocomposites through macroscopic design

2020

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Additive Manufacturable Materials for Electrochemical Biosensor Electrodes

Elbadawi

Ong

Pollard

et al. 2020

Adv Funct Materials

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With the impending Industrial Revolution 4.0, the information produced by sensors will be central in many applications. This includes the healthcare sector, where affordable healthcare and precision medicine are highly sought after. Electrochemical sensors have the potential to produce affordable, high sensitivity and specificity, intuitive, and rapid point‐of‐care diagnostics. Underpinning these achievements is the choice of material and the fabrication thereof. In this review, the different types of materials used in electrochemical biosensors are reported, with a focus on synthetic conductive materials. The review demonstrates that there is an abundance of materials to select from, and compositing different types of materials further widens their applicability in biosensors. In addition, the fabrication of such materials using the state‐of‐the‐art of fabrication technology, additive manufacturing (AM), is also detailed. The need for compositing is evident in AM, as the feedstock for certain AM technologies is inherently nonconductive. Both material choice and fabrication technologies limitations are also discussed to highlight opportunities for growth. The review highlights how recent technological advancements have the potential to drive the healthcare industry toward achieving its primary goals.

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Sequential Architecture Induced Strange Dielectric‐Magnetic Behaviors in Ferromagnetic Microwave Absorber

Pan

Ning

et al. 2023

Adv Funct Materials

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The high filler loading (FL) is a bottleneck in developing lightweight ferromagnetic microwave absorbers (MAs) for the actual applications. Sequential architecture design of MAs can induce strange physical behaviors due to the unique coupling‐enhancement effect between functional units, providing a vast potential for achieving high microwave absorption performance. However, the FLs of current sequential MAs fail to be designed on demand because the strange dielectric‐magnetic behaviors cannot be fulfilled. The influence of sequential architecture engineering on the macroscopic properties or microscopic loss mechanism still needs more exploration. Herein, based on four mesoscopic models (particles, chains, bundles, and fibers) of ferromagnetic functional units, a series of ferromagnetic MAs with different sequential architectures are prepared via a bottom‐up self‐assembly method. The fibrous samples exhibit the best microwave absorption performance (−51.3 dB, 4.12 GHz) at a breakthrough FL of 2 wt%, which is one order of magnitude less than other ferromagnetic MAs. Strange dielectric‐magnetic behaviors, including negative permittivity and heterodromous chiral vortex, occur due to functional units with lateral and fibrous configurations. Further, four special models are established to reveal the microwave attenuation evolutionary mechanism. This study clarifies the relationship between sequential architecture and strange dielectric‐magnetic behaviors, which provides new sight to understand microscopic electromagnetic loss mechanism.

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MXene interlayered crosslinked conducting polymer film for highly specific absorption and electromagnetic interference shielding

Cited by 52 publications

References 24 publications

Enhancement of microwave absorption bandwidth of MXene nanocomposites through macroscopic design

Enhancement of microwave absorption bandwidth of MXene nanocomposites through macroscopic design

Additive Manufacturable Materials for Electrochemical Biosensor Electrodes

Sequential Architecture Induced Strange Dielectric‐Magnetic Behaviors in Ferromagnetic Microwave Absorber

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