Interlayer interaction mechanism and its regulation on optical properties of bilayer SiCNSs

Kong, Shuang-Shuang; Liu, Wei-Kai; Yu, Xiaoxia; Li, Yalin; Yang, Liu-Zhu; Ma, Yun; Fang, Xiao‐Yong

doi:10.1007/s11467-023-1263-9

Cited by 39 publications

(10 citation statements)

References 46 publications

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“…The suitable annealed temperature enables the Ti 3 C 2 T x nanosheets to load appropriate amount of TiO 2 nanoparticles, and the dispersed TiO 2 nanoparticles partly destroys the original conductive network of the pristine MXene, reducing the interaction between the charged particles and the EM field, facilitating the matching of the impedance (figure 2(b3)). Simultaneously, the dispersed TiO 2 particles promote the forming of Ti 3 C 2 T x /TiO 2 relaxation interfaces, effectively enhancing the attenuation properties of the material [33,34]. When the annealed temperature continues to increase, as the phase of MXene is gradually converted to the irregular merged TiO 2 phase, the declined heterogeneous interfaces and the seriously damaged conductive networks bring weak EMW absorption and mismatched impedance (figures 2(c) and (d)).…”

Section: Resultsmentioning

confidence: 99%

Engineering multi-relaxation interfaces in Ti₃C₂T _x for reducing wideband radar cross section

et al. 2023

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The development of multifunctional electromagnetic wave (EMW) absorbing materials become the inevitable course for the rapid progress of military weapons and 5G smart communication technology. The construction of engineered multi-relaxation interfaces provides an effective means for materials to enhance EMW attenuation. Herein, MXene derived Ti3C2Tx/TiO2 heterogeneous interface is tailored through the in-situ anneal, where the multi-relaxation nano-interfaces are achieved. When the annealed temperature reaches 450 °C, the maximum reflection loss (RL) of Ti3C2Tx/TiO2 is -30.4 dB at 5.67 GHz due to the enhanced interfacial polarization and optimized impedance matching. More importantly, an effective reduction in the radar cross section up to -53 dBm2 was achieved by using the Ti3C2Tx/TiO2 as the octagonal patch through effective shape design. Therefore, we believe that Ti3C2Tx/TiO2 with optimized shape has a broad application prospect in the field of radar stealth and practical electromagnetic protection.

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Section: Resultsmentioning

confidence: 99%

Engineering multi-relaxation interfaces in Ti₃C₂T _x for reducing wideband radar cross section

et al. 2023

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“…Electrons and holes in TMDs are tightly confined within the 2D plane, leading to enhanced excitonic effects and high absorption coefficients. This results in efficient light absorption even in extremely thin layers, and thus unique optical properties like direct band gap nature, tunable band gap, valleytronic properties, strong photoluminescence, and high nonlinear optical effects are observed. − …”

Section: Resultsmentioning

confidence: 99%

Enhanced Electrochemical Performance and Charge-Transfer Dynamics of 2D MoS₂/WO₃ Nanocomposites for Futuristic Energy Applications

Shreya,

Phogat,

Jha

et al. 2024

ACS Appl. Nano Mater.

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The hybrid structures of transition-metal dichalcogenides and oxides show enhanced properties by incorporating the qualities of two pristine materials into a single one. In view of this, the present work focuses on synthesizing a series of MoS 2 /WO 3 nanocomposites wherein the molar ratio of MoS 2 to WO 3 was gradually varied to achieve the optimized properties for photovoltaic applications. The samples were analyzed for structural, optical, morphological, microstructural, electrokinetic, electrical, and electrochemical properties. Integrating the properties of MoS 2 and WO 3 provided enhanced properties in the form of wider absorbance range, optimized band gap, better colloidal stability, and increased charge-carrier mobility. The as-synthesized nanocomposites showed the absorbance in UV and visible regions with the band gap varying from 1.3 to 2.66 eV. The zeta potential measurement showed high colloidal stability of some of the nanocomposites with values < −30 mV. Hall effect study of MoS 2 /WO 3 nanocomposites revealed the enhancement in electrical properties, and the mobility is found to be of the order of 880 m 2 /(V s). The redox process was also more prominent for nanocomposite materials as well as enhanced diffusive behavior as analyzed by cyclic voltammetry. The presence of Warburg diffusion along with high-exchange current density was also observed in few samples as analyzed by potentio electrochemical impedance spectroscopy with the highest value of 336 μA. The present study reveals that the catalytic, optical, electrical, and electrochemical properties of MoS 2 /WO 3 nanocomposites can be optimized for solar cell applications by controlling the ratio of constituent materials.

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“…The highest response may be correlated to some factors explained as follows: first of all, a p–n heterojunction formed between the n-type stacks MoS 2 and p-type ZnCo 2 O 4 , which provides the large quantity of electron transfer in the nanostructures; second, the stacks structure, which can facilitate the rapid diffusion and electrons transmission density (SEM); third, the stacks structure of MoS 2 enhanced the BET surface area of the nanocomposites, which can be considered one of the imperative factors to enhance the gas sensing properties such as high response, good selectivity, and short response/recovery times, toward H 2 S (BET); fourth, moreover, as XPS approved it, the more oxygen species can be adsorbed on the surface of the sensing material, which may help out to increase the resistance. Besides, the interaction between 2D stacks materials is much smaller than the interionic forces, and the interlayer forces are regulated by the surface charge distribution . Therefore, the use of stack 2D materials can reduce the surface potential (reduce the barrier resistance), which greatly improves the resolution and response of the sensor.…”

Section: Experimental Results and Discussionmentioning

confidence: 99%

“…Besides, the interaction between 2D stacks materials is much smaller than the interionic forces, and the interlayer forces are regulated by the surface charge distribution. 32 Therefore, the use of stack 2D materials can reduce the surface potential (reduce the barrier resistance), which greatly improves the resolution and response of the sensor.…”

Section: Experimental Results and Discussionmentioning

confidence: 99%

Highly Sensitive Room Temperature H₂S Gas Sensor Based on the Nanocomposite of MoS₂–ZnCo₂O₄

Sadaf,

Zhang,

Chen

et al. 2023

ACS Omega

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The stacking 2D materials, such as molybdenum disulfide (MoS 2 ), are among the most promising candidates for detecting H 2 S gas. Herein, we designed a series of novel nanocomposites consisting of MoS 2 and ZnCo 2 O 4 . These materials were synthesized via a simple hydrothermal method. The microstructure and morphology of nanocomposites were studied by different characteristics such as X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, high-resolution transmission electron microscopy, Brunauer–Emmett–Teller (BET), and X-ray photoelectron spectroscopy. These nanocomposites were used as gas sensors, and the highest response (6.6) toward 10 ppm of H 2 S was detected by the gas sensor of MZCO-6 (having MoS 2 contents 0.060 g) among all other tested sensors. The response value ( R a / R g ) was almost three times that of pure ZnCo 2 O 4 ( R a / R g = 2). In addition, the sensor of MZCO-6 exposed good selectivity, short response/recovery time (12/28 s), long-term stability (28 days), and a low detection limit (0.5 ppm) toward H 2 S gas at RT. The excellent performance of MZCO-6 may be attributed to some features of MoS 2 , such as stack structure, higher BET and surface area and active sites, a synergistic effect, etc. This simple fabrication sensor provides a novel idea for detecting H 2 S gas at RT.

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Interlayer interaction mechanism and its regulation on optical properties of bilayer SiCNSs

Cited by 39 publications

References 46 publications

Engineering multi-relaxation interfaces in Ti₃C₂T _x for reducing wideband radar cross section

Engineering multi-relaxation interfaces in Ti₃C₂T _x for reducing wideband radar cross section

Enhanced Electrochemical Performance and Charge-Transfer Dynamics of 2D MoS₂/WO₃ Nanocomposites for Futuristic Energy Applications

Highly Sensitive Room Temperature H₂S Gas Sensor Based on the Nanocomposite of MoS₂–ZnCo₂O₄

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Interlayer interaction mechanism and its regulation on optical properties of bilayer SiCNSs

Cited by 39 publications

References 46 publications

Engineering multi-relaxation interfaces in Ti3C2T x for reducing wideband radar cross section

Engineering multi-relaxation interfaces in Ti3C2T x for reducing wideband radar cross section

Enhanced Electrochemical Performance and Charge-Transfer Dynamics of 2D MoS2/WO3 Nanocomposites for Futuristic Energy Applications

Highly Sensitive Room Temperature H2S Gas Sensor Based on the Nanocomposite of MoS2–ZnCo2O4

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Product

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Engineering multi-relaxation interfaces in Ti₃C₂T _x for reducing wideband radar cross section

Engineering multi-relaxation interfaces in Ti₃C₂T _x for reducing wideband radar cross section

Enhanced Electrochemical Performance and Charge-Transfer Dynamics of 2D MoS₂/WO₃ Nanocomposites for Futuristic Energy Applications

Highly Sensitive Room Temperature H₂S Gas Sensor Based on the Nanocomposite of MoS₂–ZnCo₂O₄