Magnetite Nanocrystals on Multiwalled Carbon Nanotubes as a Synergistic Microwave Absorber
Citations Over TimeTop 10% of 2013 papers
Abstract
The understanding of the interaction between the building blocks in the hybrids can advance our comprehension of design principles in high-performance microwave absorbing materials. Here, we report a hybrid material consisting of magnetite (Fe3O4) nanocrystals grown on multiwalled carbon nanotube (MWCNT) as a high-performance microwave absorber in the 2–18 GHz band, although Fe3O4 nanocrystals or MWCNTs alone or their physical mixture show little microwave absorption. The hybrid is characterized by transmission electron microscopy, X-ray diffraction, and vector network analysis, X-ray absorption near-edge structures at the C K-edge and Fe L3,2-edge, and electron spin resonance analysis. Microstructural analysis reveals that Fe3O4 nanocrystals are immobilized on the MWCNT surface by a strong interaction. Charges in the MWCNT/Fe3O4 hybrids transfer from the conduction band in Fe3O4 to C 2p-derived states in the MWCNT substrate. Dipole interaction between the magnetic nanocrystals is increased. The synergetic interactions leads to much improved microwave absorption.
Related Papers
- → Formation of ultrafine-grained magnetite in soils(1988)614 cited
- → Inorganic Magnetite Precipitation at 25 °C: A Low-Cost Inorganic Coprecipitation Method(2010)26 cited
- → The identification of magnetite in limestones using the low-temperature transition(1975)20 cited
- 공침법에 의해서 제조된 자성유체의 자기적 특성 변화 연구(2001)
- → Changes in the oxidation of iron in magnetite; two kinds of magnetite? (discussion)(1927)