Enhancing Defect-Induced Dipole Polarization Strategy of SiC@MoO_(3)Nanocomposite Towards Electromagnetic Wave Absorption

作     者：Ting Wang Wenxin Zhao Yukun Miao Anguo Cui Chuanhui Gao Chang Wang Liying Yuan Zhongning Tian Alan Meng Zhenjiang Li Meng Zhang Ting Wang;Wenxin Zhao;Yukun Miao;Anguo Cui;Chuanhui Gao;Chang Wang;Liying Yuan;Zhongning Tian;Alan Meng;Zhenjiang Li;Meng Zhang

作者机构：College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042People’s Republic of China College of Materials Science and EngineeringQingdao University of Science and TechnologyQingdao 266042People’s Republic of China Shandong Engineering Laboratory for Preparation and Application of High-Performance Carbon-MaterialsCollege of Electromechanical EngineeringQingdao University of Science and TechnologyQingdao 266061People’s Republic of China Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life ScienceMOEShandong Key Laboratory of Biochemical AnalysisCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2024年第16卷第12期

页      面：406-426页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foundation of China under Grant Nos. 52072196, 52002200, 52102106, 52202262, 22379081, 22379080 Major Basic Research Program of Natural Science Foundation of Shandong Province under Grant No. ZR2020ZD09 the Natural Science Foundation of Shandong Province under Grant Nos. ZR2020QE063, ZR2022ME090, ZR2023QE059. Moreover supported by the Visiting Scholar Fellowship Funding for Teachers in Shandong Province’s General Undergraduate Institutions 

主　　题：Defect engineering Oxygen vacancies SiC@MoO_(3)nanocomposite Electromagnetic wave absorption Induced dipole polarization 

摘      要：Defect engineering in transition metal oxides semiconductors(TMOs)is attracting considerable interest due to its potential to enhance conductivity by intentionally introducing defects that modulate the electronic structures of the ***,achieving a comprehensive understanding of the relationship between micro-structures and electromagnetic wave absorption capabilities remains elusive,posing a substantial challenge to the advancement of TMOs *** current research describes a process for the deposition of a MoO_(3)layer onto SiC nanowires,achieved via electro-deposition followed by high-temperature ***,intentional creation of oxygen vacancies within the MoO_(3)layer was carried out,facilitating the precise adjustment of electromagnetic properties to enhance the microwave absorption performance of the ***,the SiC@MO-t4 sample exhibited an excellent minimum reflection loss of-50.49 dB at a matching thickness of 1.27 ***,the SiC@MO-t6 sample exhibited an effective absorption bandwidth of 8.72 GHz with a thickness of 2.81 mm,comprehensively covering the entire Ku *** results not only highlight the pivotal role of defect engineering in the nuanced adjustment of electromagnetic properties but also provide valuable insight for the application of defect engineering methods in broadening the spectrum of electromagnetic wave absor ption ***@MO-t samples with varying concentrations of oxygen vacancies were prepared through in-situ etching of the SiC@MoO_(3)*** presence of oxygen vacancies plays a crucial role in adjusting the band gap and local electron distribution,which in turn enhances conductivity loss and induced polarization loss *** finding reveals a novel strategy for improving the absorption properties of electromagnetic waves through defect engineering.