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Can the Wonder Material Graphene Be Used as A Thin-Filmed Broadband Nanostructure Metamaterial Absorber?

Professor of Electrical Engineering, Dr. Montasir Qasymeh from the College of Engineering, published his latest research which evaluates how graphene, which has been described as a wonder material and a Nobel prize-winning discovery in its own right in 2010, can be used as a thin-film coating to improve the efficiency and performance of leading-edge technologies. This research has numerous industrial uses. Important applications, for example, include solar energy harvesting, surface disinfection, water desalination and purification, which has the potential to make an important contribution to achieving two UN Sustainable Development Goals (SDGs): 6 clean water and sanitation and 7 affordable and clean energy.

Professor Montasir explained the motivation for the research project: “Noble metals such as gold and silver nanofilms have been used extensively.  However, metamaterial absorption could possibly be improved using graphene coating layers, and act as a surface protection coating layer for nanofilms. Our research sought to evaluate the performance of graphene as a coating material in combination with more cost-effective lossy materials titanium, nickel, tungsten and magnesium”.

The reported results show that using graphene as a coating layer on lossy-metal nano-disks improved the average absorption of the plasmonic nanostructures by more than 10%, while offering protection and stability as a coating layer for the lossy materials. These findings pave the way for developing efficient and practical broadband absorbers across a range of industrial applications.   
Reference: Khosravi, R., Yashar E. M., and M.  Qasymeh (2022) Ultra-broadband nearly perfect absorbers based on graphene-coated lossy metallic nanostructures, Results in Physics, Vol 36.

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