A theoretical strategy of pure carbon materials for lightweight and excellent absorption performance

Yan, Xu; Huang, Xiaoxiao; Chen, Yanting; Liu, Yu-Hao; Xia, Long; Zhang, Tao; Hu, Lin; Jia, Dechang; Zhong, Bo; Wen, Guangwu; Zhou, Yu

doi:10.1016/j.carbon.2020.11.044

Cited by 110 publications

(25 citation statements)

References 49 publications

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“…In the other hand increment the input power reduces the Min BER but enhances the insertion loss of the system. Finally, it can be shown the obtained results for free space optical communication can be used in WDM (Zuo et al 2017), and advanced applications (Zuo et al 2015;Zhang et al 2020b;Zhang et al 2020c;Zhang et al 2019a;Liu et al 2020;Niu et al 2020;Niu et al 1998), such as transceiver front end (Liu et al 2020), multicarrier communication systems (Niu et al 2020), mmWave UAV Communications (Zhao et al 2020b), chaotic systems (Wang and Chen 2019), micro-Doppler signatures (Yang et al 2019), wideband-tunable optoelectronic oscillator (Zhang et al 2021), fast sliding-mode speed controller (Qu et al 2021), quantum key distribution (Wang 2021), MBR performance (Sun et al 2021), and also several materials can be used such as Organic Dye (Zhang et al 2020d), NaClO (Zhang et al 2019b), membrane (Sun et al 2019), graphite (Dai, et al 2021), carbon based material (Li et al 2020;Yang et al 2020;Liu et al 2021a;Yan et al 2021) and so on (Liu et al 2021b;Hou et al 2021).…”

Section: Simulation Resultsmentioning

confidence: 99%

Analysis of optical power budget in DWDM-FSO link under outdoor atmospheric channel model

2021

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In this paper, the effects of atmospheric turbulence on the performance of a hybrid dense wavelength division modulation (DWDM) of free space optical (FSO) communication using advanced modulations are presented. Enhancement in the capacity of transmission and bit rates of the optical networks is obtained by DWDM technology based on FSO communication systems. Proposed modulations are included Return-to-Zero Differential Phase Shift Keying (RZ-DPSK) and Non-Return-to-Zero Differential Phase Shift Keying (NRZ-DPSK) that each of them increases spectrum efficiency. Furthermore, the optical power budget of the proposed system is analytically calculated. Variation of Bit Error Rate and Max quality factor of the designed system with different path distance and input power are obtained considering outdoor atmosphere channel model. As a result, the RZ-DPSK modulation has better performance in comparison to NRZ-DPSK modulation when the atmospheric condition is considered.

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Section: Simulation Resultsmentioning

confidence: 99%

Analysis of optical power budget in DWDM-FSO link under outdoor atmospheric channel model

2021

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“…Following the interesting investigation of researchers in the field of organic compounds, [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] the present work covers thermodynamic and kinetic characteristics of 1s-27s and 1t-27t along with the first isolated silylenes, IIs and IIt (Schemes 1 and 2). Effects of one and two fused benzene, pyridine, phosphinine, pyrrole, phosphole, furan, and thiophene rings on the aromaticity, APT charge, and MEP graph along with reactivity of these Hammick type silylenes are investigated at DFT.…”

Section: Resultsmentioning

confidence: 99%

Substituent effects of fused Hammick silylenes via density functional theory survey

Heravi

Habibzadeh

Ebadi

et al. 2021

J of Physical Organic Chem

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We compared and contrasted the substituent effects on ΔΕ s-t (singlet-triplet energy difference), band gap (ΔΕ HOMO-LUMO ), aromaticity, atomic polar tensor (APT) charge distribution and reactivity of 54 singlet and triplet fused Hammick silylenes derived from silabenzopyridine-4-ylidene (1s-27s, and 1t-27t), and the synthesized dialkylsilylene by Kira, respectively. In this investigation we found the following: (1) The most and the least thermodynamic stability compared to Kira's silylene is demonstrated by fusion of two thiophene rings in para-position and two phosphole rings in ortho-position, respectively (ΔΕ s-t = 331.0 and 115.1 vs. 138.6 kJ/mol, respectively). ( 2) Although fusion of benzene, pyrrole, furan, thiophene, and phosphole ring kinetically stabilizes the corresponding silylenes, fusion of pyridine and phosphinine ring destabilizes their silylenes versus the isolated silylene's Kira (with the range of ΔE HOMO-LUMO from 312.8 to 410.2 vs. 351.7 kJ/mol). (3) The trend of substituent effects per number and size of rings is two five-membered rings > one five-membered rings > one six-membered rings > two six-membered rings. (4) Almost all cases, singlet Hammick silylenes reveal greater nucleophilicity, lesser electrophilicity, lower chemical potential, and greater global hardness than the scrutinized silylene by Kira. (5) We are waiting for experimental testing and verifications that place the heteroatom in the silapyridine's plane in a favorable spatial position to act not only as π electron donor but also acceptor of σ electron density.

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“…In addition, the disordered samples (named CW and CW@NiCo2O4) were prepared by mixing the powders with paraffin matrix and pressed into a toroidal ring with an outer diameter of 7.00 mm and inner diameter of 3.00 mm with the same filling ratio of ordered-channels samples. The MA performances reflection loss (RL) values were obtained by EM parameters on the basis of transmission line theory, which can be calculated by the following equations based on the metal back-panel model [17,18].…”

Section: Electromagnetic Parameters Measurementsmentioning

confidence: 99%

Carbonized wood with ordered channels decorated by NiCo2O4 for lightweight and high-performance microwave absorber

Qin

et al. 2021

Preprint

Self Cite

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Wood-derived carbon has a 3D porous framework composed of through channels along the growth direction, which is a suitable matrix for preparing electromagnetic wave (EMW) absorbing materials with low-cost, light-weight, environmentally friendly and excellent MA performance. Herein, the carbonized wood decorated by short cone-like NiCo2O4 (CW@NiCo2O4) with highly ordered straightway channels architecture were successfully manufactured through a facile calcination procedure. Finite Element Analysis (FEA) simulation is carried out to detect the interaction between the prepared material and EMW when the ordered channels are arranged in different directions. Simultaneously, the microwave absorption properties of all samples are investigated in terms of complex permittivity and permeability. The horizontal arrangement of the through channels of CW@NiCo2O4 (H-CW@NiCo2O4) exhibits a strong reflection loss value of -64.0 dB at 10.72 GHz with a thickness of 3.62 mm and a low filling ratio of 26wt% (with the density of 0.98g·cm− 3), and the effective absorption bandwidth (EAB) is 8.08 GHz (9.92-18.0 GHz) at the thickness of 3.2 mm. The extremely advantageous structure of H-CW@NiCo2O4 is the key to achieving excellent MA property, which enables multiple EMW loss mechanisms to be effectively realized. What’s more, the introduction of NiCo2O4 increases the values of \({\epsilon }^{\text{'}}\) and \({\epsilon }^{\text{'}\text{'}}\), resulting in enhanced dielectric loss. This research provides a low-cost, sustainable and environmentally friendly strategy for using carbonized wood to fabricate microwave absorbers with strong attenuation capabilities and lightweight.

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A theoretical strategy of pure carbon materials for lightweight and excellent absorption performance

Cited by 110 publications

References 49 publications

Analysis of optical power budget in DWDM-FSO link under outdoor atmospheric channel model

Analysis of optical power budget in DWDM-FSO link under outdoor atmospheric channel model

Substituent effects of fused Hammick silylenes via density functional theory survey

Carbonized wood with ordered channels decorated by NiCo2O4 for lightweight and high-performance microwave absorber

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