Scholarlink

<p>Metal–organic frameworks (MOFs) and their derivatives have attracted extensive attention due to their multiple microwave attenuation mechanisms. However, challenges such as poor impedance matching and narrow absorption bandwidth still require further research and development. In this work, we propose an in-situ growth strategy to integrate MOFs with silicon carbide nanowires (SiC NWs) using dimethyldimethoxysilane as a molecular bridge. This strategy enables the fabrication of a novel heterostructure composite inspired by Pocky biscuits, consisting of MOF and SiC nanowires, with remarkably enhanced microwave absorption properties. The unique heterostructure not only preserves the excellent dielectric properties of SiC NWs but also incorporates FeCo magnetic nanoparticles and a conductive carbon network derived from MOFs, achieving superior impedance matching and multi-polarization loss. Calcined at 700&#xa0;℃, the MOF/SiC NWs composite exhibits an effective absorption bandwidth (EAB) of 6.18&#xa0;GHz, covering the 11.82 to 18&#xa0;GHz range that spans the entire Ku-band at a thickness of 2.1&#xa0;mm. Furthermore, it achieves full-band absorption in the X-band at 2.9&#xa0;mm. The performance enhancement is ascribed to the collaborative contribution of multiple mechanisms, including interfacial polarization, magnetic resonance, and conduction loss, as revealed by experimental and theoretical analyses. The findings herein open a feasible avenue for designing MOF-based absorbing materials with precisely adjustable electromagnetic properties.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Pocky biscuit-Like MOF/SiC nanowires: a novel absorber covering the X and Ku bands

  • 期刊论文

  • 发表日期：

    2026年5月19日

查看全文
  • Chengjie Xu,
  • Ning Shang,
  • Baijun Chen,
  • Ningtong Yang,
  • Zhi Song,
  • Zhigang Pan,
  • Yaqiu Tao,
  • Lixi Wang

摘要

Metal–organic frameworks (MOFs) and their derivatives have attracted extensive attention due to their multiple microwave attenuation mechanisms. However, challenges such as poor impedance matching and narrow absorption bandwidth still require further research and development. In this work, we propose an in-situ growth strategy to integrate MOFs with silicon carbide nanowires (SiC NWs) using dimethyldimethoxysilane as a molecular bridge. This strategy enables the fabrication of a novel heterostructure composite inspired by Pocky biscuits, consisting of MOF and SiC nanowires, with remarkably enhanced microwave absorption properties. The unique heterostructure not only preserves the excellent dielectric properties of SiC NWs but also incorporates FeCo magnetic nanoparticles and a conductive carbon network derived from MOFs, achieving superior impedance matching and multi-polarization loss. Calcined at 700 ℃, the MOF/SiC NWs composite exhibits an effective absorption bandwidth (EAB) of 6.18 GHz, covering the 11.82 to 18 GHz range that spans the entire Ku-band at a thickness of 2.1 mm. Furthermore, it achieves full-band absorption in the X-band at 2.9 mm. The performance enhancement is ascribed to the collaborative contribution of multiple mechanisms, including interfacial polarization, magnetic resonance, and conduction loss, as revealed by experimental and theoretical analyses. The findings herein open a feasible avenue for designing MOF-based absorbing materials with precisely adjustable electromagnetic properties.