Posted in | News | Nanomaterials | Nanoanalysis

Researchers Discover Unusual Behavior in Carbon Foam

In a study set to appear in the journal Materials Today Communications, a unique finding of an atypical carbon phase nucleated on the iron filling surface was observed after 15 hours of annealing at a temperature of 990 °C. A deformed graphitic morphology was identified using TEM and HRTEM profile studies, as well as the fast Fourier transform (FFT).

Researchers Discover Unusual Behavior in Carbon Foam​​​​​​​

Study: Unusual broad antiferromagnetic transition in weakly graphitic carbon foam continuously filled with α-Fe. Image Credit: Gorodenkoff/

An Introduction to Ferromagnetically Filled Carbon Materials

Ferromagnetic loaded carbon composites are unique multifunction structures that have lately sparked considerable interest in materials chemistry and physics. Among the most appealing qualities of such substances is their great magnetic configuration, which emphasizes the potential of harnessing and modifying controlled magnetization, which has a significant influence on electromagnetic (EM) wave dissipating technologies.

Ferromagnetic loaded carbon foam, ferromagnetic loaded carbon nanotubes (Me@CNTs), where Me is the embedded metal or metallic carbide nanowire), ferromagnetic loaded carbon onions (Me@CNOs), iron-loaded graphene-covered nanoscale composites, Iron/iron-oxide-loaded materials (covered with amorphous carbon), and Fe-based ferromagnetic silica composite materials are examples this class of materials.

Salient Features of Ferromagnetically Filled Carbon Foams

In contrast with other complexes, ferromagnetic loaded graphite foams take advantage of rapid and uninterrupted ferromagnetic loading speeds. The activated magnetic areas are a very large-volume-fraction of these materials, allowing for extremely high saturating magnetizations equivalent to that of bulk Fe. A recent study also revealed the occurrence of unexpected architectural/magnetic transitions in this sort of complex, perhaps featuring an abnormal conversion of α-Fe into γ-Fe at lower temperatures.

The implementations of this unique type of carbon-foam materials take advantage of the ferromagnetic loading's adjustable magnetic characteristics or the innate EM absorbing-dissipating ability of the magnetic moments inside the ferromagnetic α-Fe phase, that has been proven to have especially high saturating magnetizations.

Hybrid Systems Also Show Good Microwave Absorption

Lately, extremely high microwave absorbing capabilities have been observed in hybrid systems comprising a dual-oxide cover of ZnO/Al2O3 as a strong boundary to a FeSiAl center (FeSiAl@ZnO@Al2O3). Additional uses of such structures may entail the modification of the carbon sheets by fluorination. Fluorinated nanoscale films have been identified as promising contenders for use in super-high-capacity Li batteries.

Furthermore, the type of magnetic-ordering inside the α-Fe loading of the graphitic foam and the issue of whether or not those magnetic moments engage with the spins of the π-electrons (i.e., electricity and heat-conducting electrons), are key elements that require further investigation.

Methodology Followed by the Researchers

In this study, the team reports on their innovative examination of this foam structure, emphasizing the characteristics of the carbon casings. The formation of an atypical carbon phase with high crystalline spacing is demonstrated in specimens annealed for 15 hours at temperatures of 990 ºC. The detection of a deformed hexagon graphite structure was made possible using transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) investigations, as well as fast Fourier transform (FFT) analysis.

The D, D', G, and 2D bands were investigated structurally using point and spatial mapping Raman spectroscopic methods, which indicated notably powerful D and D' bands and a usually weak G band.

Using electron spin resonance (ESR) spectroscopy, further observations showed an interesting variant of the π-electron differential absorptive characteristic.

Important Findings of the Study

This study presented a fresh analysis of an atypical carbon phase nucleated on the exterior of iron-loaded graphitic foam after annealing for 15 hours at a temperature of 990 ºC.

The discovery of a deformed carbon phase was made possible by the use of TEM and HRTEM profile investigations in conjunction with FFT. This unique configuration of carbon layers was understood as the consequence of border displacements moving across the graphitic architecture during the CNOs fusing procedure.

An extensive structural analysis using point-mapping and spatial-mapping Raman spectroscopic methods found especially powerful and wide D bands, as well as a typically weak G band. T-ESR measurements at temperatures of 300K, 200K, 150K, 100K, and 77K demonstrated a significant decrease in the intensity of the π-electron differential absorptive characteristic, indicating an increasing antiferromagnetic shift.


Wu, H., Song, J. et al. (2022). Unusual broad antiferromagnetic transition in weakly graphitic carbon foam continuously filled with α-Fe. Materials Today Communications. Available at:

Disclaimer: The views expressed here are those of the author expressed in their private capacity and do not necessarily represent the views of Limited T/A AZoNetwork the owner and operator of this website. This disclaimer forms part of the Terms and conditions of use of this website.

Shaheer Rehan

Written by

Shaheer Rehan

Shaheer is a graduate of Aerospace Engineering from the Institute of Space Technology, Islamabad. He has carried out research on a wide range of subjects including Aerospace Instruments and Sensors, Computational Dynamics, Aerospace Structures and Materials, Optimization Techniques, Robotics, and Clean Energy. He has been working as a freelance consultant in Aerospace Engineering for the past year. Technical Writing has always been a strong suit of Shaheer's. He has excelled at whatever he has attempted, from winning accolades on the international stage in match competitions to winning local writing competitions. Shaheer loves cars. From following Formula 1 and reading up on automotive journalism to racing in go-karts himself, his life revolves around cars. He is passionate about his sports and makes sure to always spare time for them. Squash, football, cricket, tennis, and racing are the hobbies he loves to spend his time in.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Rehan, Shaheer. (2022, April 04). Researchers Discover Unusual Behavior in Carbon Foam. AZoNano. Retrieved on June 15, 2024 from

  • MLA

    Rehan, Shaheer. "Researchers Discover Unusual Behavior in Carbon Foam". AZoNano. 15 June 2024. <>.

  • Chicago

    Rehan, Shaheer. "Researchers Discover Unusual Behavior in Carbon Foam". AZoNano. (accessed June 15, 2024).

  • Harvard

    Rehan, Shaheer. 2022. Researchers Discover Unusual Behavior in Carbon Foam. AZoNano, viewed 15 June 2024,

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.