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Defect Engineering Activates Schottky Heterointerfaces of Graphene/CoSe2 Composites with Ultrathin and Lightweight Design Strategies to Boost Electromagnetic Wave Absorption.
- Source :
- Advanced Functional Materials; 11/23/2023, Vol. 33 Issue 48, p1-14, 14p
- Publication Year :
- 2023
-
Abstract
- To tackle the increasingly complex electromagnetic (EM) pollution environment, the application-oriented electromagnetic wave (EMW) absorption materials with ultra-thin, lightweight and strong tolerance to harsh environment are urgently explored. Although graphene aerogel-based lightweight EMW absorbers have been developed, thinner thickness and more effective polarization loss strategies are still essential. Based on the theory of EMW transmission, this work innovatively proposes a high attenuation design strategy for obtaining ultra-thin EMW absorption materials, cobalt selenide (CoSe<subscript>2</subscript>) is determined as animportant part of ultra-thin absorbers. In order to obtain a dielectric parameter range that satisfies the ultra-thin absorption characteristics and improve the lightweight properties of EMW absorption materials, a composite of CoSe<subscript>2</subscript> modified N-doped reduced graphene oxide (N-RGO/CoSe<subscript>2</subscript>) is designed. Meanwhile, the controllable introduction of defect engineering into RGO can activate Schottky heterointerfaces of composites to generate a strong interfacial polarization effect, achieving ultra-thin characteristics while significantly improving the EM loss capability. In addition, infrared thermal images and anti-icing experiments show that the composite has good corrosion resistance, infrared stealth, and thermal insulation properties. Therefore, this work provides an effective strategy for obtaining thin-thickness, light-weight, and high-performance EMW absorption materials, embodying the advantages of N-RGO/CoSe<subscript>2</subscript> composites in practical applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1616301X
- Volume :
- 33
- Issue :
- 48
- Database :
- Complementary Index
- Journal :
- Advanced Functional Materials
- Publication Type :
- Academic Journal
- Accession number :
- 174487530
- Full Text :
- https://doi.org/10.1002/adfm.202305463