Atomic and Electronic Reconstruction in Defective 0D Molybdenum Carbide Heterostructure for Regulating Lower-Frequency Microwaves

Mingyue Yuan; Hualiang Lv; Hanwen ChengBiao ZhaoGuanyu ChenJincang ZhangRenchao Che

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Atomic and Electronic Reconstruction in Defective 0D Molybdenum Carbide Heterostructure for Regulating Lower-Frequency Microwaves

机译：Atomic and Electronic Reconstruction in Defective 0D Molybdenum Carbide Heterostructure for Regulating Lower-Frequency Microwaves

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摘要

0D nanomaterials with high efficiency of atom utilization possess extraordinarytunability over bulk materials. Precise reconstruction of atoms in a0D nanoparticle toward tuning of crystalline phases and defects is highlydesirable but remains a grand challenge. In this study, a crystallizationrate-controlled strategy is reported to achieve controllable reconstructionof atoms in situ, which inducts a series of monodisperse 0D molybdenumcarbide nanoparticles (Mo_xC NP) that anchor on a carbon matrix withadjustable crystalline phases and atom vacancies. Aberration-correctedtransmission electron microscopy, electron paramagnetic resonancetechnique, density functional theory calculation, and electron holographyjointly reveal the atomic reconstruction process and confirm its remarkableeffects of optimizing the local electronic states and enhancing theheterointerface interactions. As a result, the optimized MoC/Mo_2C heterostructureon the carbon matrix is shown to enable the promoted dielectricresponse and generate more than 90% absorption of lower-frequencymicrowaves (the current 5th-generation communication band). The controlof atomic reconstruction may provide an effective pathway for unlockingtunable dielectric properties of 0D nanomaterials toward various technologicalapplications.

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来源
《Advanced functional materials》 |2023年第33期|2302003.1-2302003.14|共14页
作者
Mingyue Yuan; Hualiang Lv; Hanwen ChengBiao ZhaoGuanyu ChenJincang ZhangRenchao Che;
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作者单位

Laboratory of Advanced MaterialsShanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering & TechnologyFudan UniversityShanghai 200438, P. R. China;

Institute of OptoelectronicsFudan UniversityShanghai 200433, P. R. China;

School of MicroelectronicsFudan UniversityShanghai 200433, P. R. ChinaZhejiang LaboratoryHangzhou 311100, P. R. ChinaLaboratory of Advanced MaterialsShanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering & TechnologyFudan UniversityShanghai 200438, P. R. China,Zhejiang LaboratoryHangzhou 311100, P. R. China;

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正文语种英语
中图分类无线电电子学、电信技术;工程材料学;
关键词
0D nanomaterials; atomic reconstruction; defects; lower-frequency microwave absorption; molybdenum carbide;

Atomic and Electronic Reconstruction in Defective 0D Molybdenum Carbide Heterostructure for Regulating Lower-Frequency Microwaves

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